LEO WR 8 Channel Web Relay Module

1.Introduction

Sl.No.	SKU	Description	Relay Type	Operating temperature
1	NLEWR008A	LEO WR 8 Channel Web Relay Module - WR8A	SPST	-40 ℃ to 85 ℃
2	NLEWR008A-24	LEO WR 8 Channel Web Relay Module - WR8A-24	SPST	-40 ℃ to 85 ℃
3	NLEWR008B	LEO WR 8 Channel Web Relay Module - WR8B	SPDT	-40 ℃ to 85 ℃
4	NLEWR008B-24	LEO WR 8 Channel Web Relay Module - WR8B-24	SPDT	-40 ℃ to 85 ℃

Note: In this document, “LEO WR8” refers to the LEO WR 8 Channel Web Relay Module.

The Numato Lab LEO WR 8 Channel Web Relay Module is a compact, network-enabled controller designed for remote control and monitoring of electrical and electronic devices.

The LEO WR8 provides 8 relay channels and high-voltage digital inputs supporting up to 24 V, with Ethernet and 2.4 GHz Wi-Fi connectivity.

The module supports multiple communication methods depending on the network interface:

Ethernet: Web interface, REST API, and Telnet
Wi-Fi: Web interface, REST API, and MQTT/MQTTS

The MQTT/MQTTS support allows the LEO WR8 to connect to MQTT-compatible cloud platforms and IoT services. Once connected, these platforms can be used to remotely monitor the device and control its relays, enabling integration with cloud-based automation systems.

With its flexible connectivity and easy-to-use interfaces, the LEO WR8 is suitable for industrial automation, IoT applications, remote equipment control, testing, and smart automation systems. Users can operate the device through the web interface or integrate it into custom applications using REST API, Telnet, or MQTT/MQTTS.

Applications

Industrial Automation: Monitor sensor inputs and control actuators, machines, or alarms based on configurable logic.
Smart Home & Building Automation: Automate lighting, HVAC systems, and appliances using environmental data and remote control.
IoT & Cloud-Based Monitoring: Stream real-time data to AWS, Azure, or private MQTT brokers for centralized dashboards and alerting.
Remote Control Systems: Operate devices from anywhere using the onboard web server or REST APIs.
Smart Agriculture: Monitor field conditions and control irrigation or other systems based on environmental triggers.
Test Fixtures
DIY and Hobby

Key Features

8 Relay Outputs: Available in SPST and SPDT variants. Relay contact ratings depend on the installed relay variant.
8 High-Voltage Digital Inputs: Supports input voltages of up to 24 V for monitoring external signals and equipment.
Relay Status LEDs: Individual LEDs indicate the status of each relay on SPST relay variants.
Standalone Rule-Based Automation: Create local automation rules to automatically control relays based on input conditions and configured events, without requiring a host PC or cloud connection.
Smart Relay Control: Provides intelligent relay control based on configured conditions, inputs, and automation rules.
Relay Timer: Configure relays to turn ON or OFF automatically for a specified duration or at configured intervals.
Fail-Safe Operation: Configure predefined relay states and actions to maintain safe and predictable operation during communication or system failures.
Ethernet Connectivity: Provides reliable wired network connectivity for device access and control.
2.4 GHz Wi-Fi: Provides wireless connectivity for remote monitoring and control.
Web Interface: Built-in password-protected web interface for device configuration, monitoring, and relay control.
REST API: Enables integration with custom software and automation applications over Ethernet and Wi-Fi.
Telnet Interface: Provides command-line access for relay control and device configuration over Ethernet.
MQTT/MQTTS Support: Enables integration with MQTT-compatible IoT and cloud platforms for remote monitoring and control over Wi-Fi.
Cloud Integration: Supports cloud platforms and services that use MQTT/MQTTS, including AWS, Microsoft Azure, and other MQTT-compatible platforms.
DIN Rail Mounting: Supports standard DIN rail installation for convenient deployment in control panels and industrial environments.
USB Connectivity: Provides local access and configuration without requiring a network connection.
RGB Status Indicator: Provides a quick visual indication of the device’s operating status.

Parameter*		Value			Unit
Variant	NLEWR008A	NLEWR008A-24	NLEWR008B	NLEWR008B-24
Basic Specifications
Number of relays	8	8	8	8
Number of Digital Inputs	8	8	8	8
Digital circuit power supply voltage (External)	12	24	12	24	V
Maximum current drawn by digital circuitry	300	300	300	300	mA
Digital Inputs Specifications
Minimum DI sink current	2.05	2.05	2.05	2.05	mA
Maximum DI sink current	30	30	30	30	mA
Recommended sink current	10	10	10	10	mA
Maximum Low Voltage (VIL)	10.2	10.2	10.2	10.2	V
Minimum High Voltage (VIH)	10.5	10.5	10.5	10.5	V
Maximum High Voltage	24	24	24	24	V
Relay Specifications
Nominal relay coil voltage	12	24	12	24	V
Nominal coil power consumption (per relay)	450	450	450	450	mW
Relay contact material	Silver Alloy, silver metal-oxide	Silver Alloy, silver metal-oxide	silver metal-oxide	silver metal-oxide
Contact rating	7A 250VAC 7A 28VDC	7A 250VAC 7A 28VDC	7A/ 277V AC 7A/ 28V DC	7A/ 277V AC 7A/ 28V DC
Maximum switching voltage	250VAC/30VDC	250VAC/30VDC	277VAC/28VDC	277VAC/28VDC
Maximum switching current	7	7	7	7	A
Maximum switching power	2500VA/300W	2500VA/300W	2770VA/ 196W	2770VA/ 196W
Contact resistance	100	100	100	100	mΩ (at 1A 6VDC)
Insulation resistance	1000	1000			MΩ
Life expectancy (Electrical)	100000	100000	100000	100000	Operations (at 7A 250VAC resistive load, room temp)
Life expectancy (Mechanical)	10000000	10000000	10000000	10000000	Operations
Maximum switching on response time	1	1	1	1	second
Maximum switching off response time	9	9	9	9	second
shock resistance (Functional)	294	294	98	98	m/s2
Shock resistance (Destructive)	980	980	980	980	m/s2
Vibration resistance	10Hz to 55Hz, 1.5mm DA	10Hz to 55Hz, 1.5mm DA	10Hz to 55Hz, 1.5mm DA	10Hz to 55Hz, 1.5mm DA
Relay Indication	Available	Available	Not Available	Not Available

LED Indication	Status
Solid Red	USB configuration mode
Blinks in Blue Colour	Trying to connect to network
Solid Purple	Connected to Ethernet network
Solid Turquoise Blue	Connected to Wi-Fi network
Solid Blue	Connected to both Ethernet and Wi-Fi
Blinks in Red Colour	Factory reset in progress

Action	LED Indication	Function
Single Click	The Red LED briefly turns OFF and ON, indicating that the device is restarting.	Device Reset: Resets the device and reinitializes.
Press for 7-10 seconds	The Red LED blinks continuously while the factory reset process is in progress.	Factory Reset: Device erases all the settings and restores to factory defaults.

User name	admin
Password	admin1234
Host Name - both net0 and net1	*Factory set default unique Hostname.
Device ID	00000000
net0 IP Address	169.254.1.1
Telnet Authentication	ON
Telnet Port	23
net1 IP Address	169.254.1.1
Access IP - both net0 and net1	Disabled
IP0 to IP9	255.255.255.255
DHCP Status - both net0 and net1	Enabled
Smart Action	Disabled
Relay Power-On	Disabled
GPI Notify Feature	Disabled
IO Fail-Safe	Idle

Error Code	Error Name	Description
-3	Invalid Command	The device does not recognise the entered command
-2	Invalid Argument	One or more parameters are incorrect
-51	Invalid Relay Timer Limit	Timer delay is outside the allowed range
-41	Invalid Smart Engine Mode	The IO is already set to a different smart engine mode
-42	Invalid Relay Value	The relay value is outside the allowed range in the smart action engine

Interface	Available Communication
Ethernet	Web Interface, REST API, Telnet
Wi-Fi	Web Interface, REST API, MQTT/MQTTS

No.	Command	Parameters	Example	Description
Device Configuration
1	ver	none	ver	Returns firmware Version
2	info	none	info	Display information about the module including Failsafe and Power-on status
3	id	get/set xxxxxxxx	id get, id set 12345678	Reads/Sets id of the module
4	usr	get/set xxxxxxxx	usr get, usr set admin	Reads/Sets User name
5	pass	get/set xxxxxxxx	pass get, pass set admin1234	Reads/Sets Password
6	usr auth	get/on/off	usr auth get, usr auth on, usr auth off	Returns User Auth status, Enable/Disable Authentication
7	access	ip get/on/off/set N xxx.xxx.xxx.xxx	access ip get	Read the stored IP in the memory.
			access ip on/off	Enable or disabling the IP based access to the module, this command adds filtering. Once the command is enabled, the stored IP using the access ip set command will be able to access the module. By default access IP is disabled.
			access ip set N xxx.xxx.xxx.xxx	Set the acceptable IP in the network and save the same. Where N is the number 0-9, maximum 10 IP we can store in the non-volatile memory. Eg: access ip set 0 192.168.0. 2
8	reboot	none	reboot	Reboot does a soft-reset.
9	app mode	none	app mode	Exit the configuration interface and enter to the application mode and start the application communications.
10	fact reset	none	fact reset	Perform device factory reset

No.	Command	Parameters	Example	Description
Network0 Configuration
1	net0	mac get	net0 mac get	Read the MAC id of the NET0 Ethernet Interface.
2		hostname get	net0 hostname get	Shows the hostname of the Ethernet interface
3		hostname set xxxxxxxxxxxxxxx	net0 hostname set numato-eth	Sets the hostname to the Ethernet Interface. Hostname length must be between 1 and 15 characters, and only the '-' symbol is allowed
4		dhcp get	net0 dhcp get	Shows the DHCP status of the Ethernet Interface
5		dhcp on/off	net0 dhcp on/off	Enable or disable the DHCP of the Ethernet Interface
6		ip get	net0 ip get	Read the status of DHCP and the static IP of the Ethernet Interface. If DHCP is enabled it will display the DHCP status, and if it is disabled it will display the static IP too
7		ip set xxx.xxx.xxx.xxx	net0 ip set 192.168.5.36	Sets the static IP to the Ethernet Interface.
8		sm get	net0 sm get	Read the Subnet Mask of the Ethernet Interface. If DHCP is enabled it will display the DHCP status and if it is disabled it will display the Subnet Mask value.
9		sm set xxx.xxx.xxx.xxx	net0 sm set 255.255.255.0	Sets the Subnet Mask to the Ethernet Interface.
10		gw get	net0 gw get	Reads the Gateway of the Ethernet Interface. If DHCP is enabled it will display the DHCP status and if it is disabled it will display the Gateway value.
11		gw set xxx.xxx.xxx.xxx	net0 gw set 192.168.5.1	Sets the gateway to the Ethernet Interface.
Telnet Configuration
12		telnet auth get	net0 telnet auth get	Read the status of telnet authentication.
13		telnet auth on/off	net0 telnet auth on/off	Enable and disable the telnet authentication. telnet auth on enabling the telnet authentication and telnet off disabling the telnet authentication.
14		telnet port get	net0 telnet port get	Shows the telnet port.
15		telnet port set xxxxx	net0 telnet port set xxxxx	Sets the telnet port, where xxxxx can be in the range of 1 to 65535. The default value of the telnet port is 23.

No.	Command	Parameters	Example	Description
Network1 Configuration
1	net1	mac get	net1 mac get	Read the MAC id of the NET1 Wi-Fi Interface.
2		hostname get	net1 hostname get	Shows the hostname of the Wi-Fi interface
3		hostname set xxxxxxxxxxxxxxx	net1 hostname set Numato123	Set a unique hostname for the device. This is useful for identifying the device on the network and can be customized to reflect the device’s role or location. Hostname length must be between 1 and 15 characters, and only the '-' symbol is allowed
4		ssid get	net1 ssid get	Shows the SSID of the configured Wi-Fi network
5		ssid set xxxxxxxx	net1 ssid set admin	Enter the SSID (network name) of the Wi-Fi network that the device should connect to. This is the name of the wireless network that the device will search for and connect to. SSID length must be between 1 and 31 characters and '\', '/', space symbols are restricted
6		pass get	net1 pass get	Shows the password of the configured Wi-Fi network
7		pass set xxxxxxxx	net1 pass set admin1234	Enter the Wi-Fi password for the SSID you've selected. This ensures secure communication between the device and your network. Password length must be between 1 and 31 characters and '\', '/', space symbols are restricted
8		dhcp get	net1 dhcp get	Shows the DHCP status of the Wi-Fi Interface
9		dhcp on/off	net1 dhcp on/off	Enable or disable the DHCP of the Wi-Fi Interface
10		ip get	net1 ip get	Read the status of DHCP and the static IP of the Wi-Fi Interface. If DHCP is enabled it will display the DHCP status and if it is disabled it will display the static IP too
11		ip set xxx.xxx.xxx.xxx	net1 ip set 192.168.5.48	Sets the static IP to the Wi-Fi Interface.
12		sm get	net1 sm get	Read the Subnet Mask of the Wi-Fi Interface. If DHCP is enabled it will display the DHCP status and if it is disabled it will display the Subnet Mask value.
13		sm set xxx.xxx.xxx.xxx	net1 sm set 255.255.255.0	Sets the Subnet Mask to the Wi-Fi Interface.
14		gw get	net1 gw get	Reads the Gateway of the Wi-Fi Interface. If DHCP is enabled it will display the DHCP status and if it is disabled it will display the Gateway value.
15		gw set xxx.xxx.xxx.xxx	net1 gw set 192.168.5.1	Sets the gateway to the Wi-Fi Interface.
16		pdns get	net1 pdns get	Reads the Primary DNS of the Wi-Fi Interface. If DHCP is enabled it will display the DHCP status and if it is disabled it will display the Primary DNS value.
17		pdns set xxx.xxx.xxx.xxx	net1 pdns set 8.8.8.8	Sets the primary dns to the Wi-Fi Interface.

No.	Command	Example	Description
1	ver	ver	This command returns the current firmware version of the device. Command Format `ver` Response Format `xxxx` xxxx – Firmware version string Description Returns the firmware version currently running on the device. Example `ver` Returns firmware version Notes The version format may vary depending on the firmware release.
2	id	id get id set xxxxxxxx	This command is used to read and configure the device ID. Command Format `id get` `id set x` x – New device ID (exactly 8 characters) Description `id get` returns the current device ID. `id set x` updates the device ID to the specified value. Example `id get` Returns the current device ID `id set DEV12345` Sets the device ID to "DEV12345" Notes The device ID must be exactly 8 characters in length. Changing the device ID may affect identification in connected systems or applications.n a new ID to the module. “x” stands for alphanumeric characters including symbols. The new ID must be exactly 8 characters in length.
3	usr	usr get usr set xxxxxxxx	This command is used to read and configure the device username. Command Format `usr get` `usr set x` x – New username (1 to 8 characters) Description `usr get` returns the current username configured on the device. `usr set x` updates the username to the specified value. Example `usr get` Returns the current username `usr set admin` Sets the username to "admin" Notes Username length must be between 1 and 8 characters. Changing the username affects authentication over the USB interface.
4	pass	pass get pass set xxxxxxxxx	This command is used to read and configure the device password. Command Format `pass get` `pass set x` x – New password (9 to 31 characters, alphanumeric and symbols supported are `!, @, ^, (, )`) Description `pass get` returns the current password configured on the device. `pass set x` updates the device password to the specified value. Example `pass get` Returns the current password `pass set admin1234` Sets the password to "admin1234" Notes Password length must be between 9 and 31 characters. Use a strong password to ensure secure access to the device. Changing the password affects authentication over the USB interface.
5	usr auth	usr auth get	This command returns the current USB authentication status. Command Format `usr auth get` Response Format `USR Authentication Disabled` – Authentication is DISABLED `USR Authentication Enabled`– Authentication is ENABLED Description Returns whether USB authentication is currently enabled or disabled. Example `usr auth get` Returns USR Authentication Enabled if authentication is enabled, otherwise USR Authentication Disabled Notes Ensure authentication is enabled for secure operation. When disabled, commands can be executed without credentials.
		usr auth on	This command enables USB authentication for the device. Command Format `usr auth on` Description Enables authentication over the USB interface. Once enabled, valid credentials are required to execute commands. Example `usr auth on` Enables USB authentication Notes Ensure valid username and password are configured before enabling authentication. If credentials are unknown, use factory reset to restore default access.
		usr auth off	This command disables USB authentication for the device. Command Format `usr auth off` Description Disables authentication over the USB interface. Once disabled, commands can be executed without requiring a username or password. Example `usr auth off` Disables USB authentication Notes Disabling authentication reduces access security. It is recommended to use this feature only in trusted environments.
6	info	info	This command displays module information, including Smart Action status, Power-on configuration, and IO Failsafe status. Command Format `info` Description Returns a summary of key module configurations in a single response. Helps in quickly verifying system setup and operational status. Example `info` Returns module configuration summary Notes The response format may vary based on firmware version. Use individual commands for detailed configuration of each feature.
7	config mode	config mode	This command exits the application interface and enter to the configuration mode. Command Format `config mode` Description The device restarts the configuration mode without altering any stored configuration. Example `config mode` Enters configuration mode
8	reboot	reboot	This command performs a soft reset of the device. Command Format `reboot` Description Restarts the device without altering any stored configuration. All settings, including Smart Action, Timer, Failsafe, and credentials, remain unchanged. Example `reboot` Performs a device soft reset Notes The device will briefly disconnect and restart after execution. Use this command to recover from temporary issues or apply configuration changes.
9	fact reset	fact reset	This command performs a factory reset of the device. Command Format `fact reset` Description Restores the device to factory default settings. All configurations, including Smart Action, Timer, Failsafe, credentials, and other user-defined parameters, will be erased. Example `fact reset` Performs a device factory reset Notes The device will briefly disconnect, the LED will blink during the reset process, and the device will restart upon completion. Use this command to recover the device or reset all configurations. This action cannot be undone.

Relay State	Connection between NC and C	Connection between NO and C
OFF	Close	Open
ON	Open	Close

Relay State	IN to OUT Connection	Load Condition
OFF	Open	Load Disconnected
ON	Closed	Load Energized

No.	Command	Example	Description
1	gpi	gpi read xxx	This command reads the current state of a specific digital input (GPI). Command Format gpi read xxx xxx – Digital input number (Range: 000 to 007) Response Format 0 or 1 0 – Input is LOW 1 – Input is HIGH Description The command returns the instantaneous logic level of the selected digital input. Example gpi read 000 Returns 0 or 1 depending on the current state of GPI 0 Notes Ensure the input number is within the valid range (000–007). The response reflects the real-time state of the input at the moment of execution.
2		gpi read	This command reads the current status of all digital inputs in a single operation and returns the values grouped by input channels. Command Format `gpi read` Response Format `A:XXXX` XXXX – Current digital input state (hexadecimal value) Description The returned value represents the state of all digital inputs in the selected group. Each bit corresponds to one input channel. 0 – GPI LOW 1 – GPI HIGH Example `A:00FF` – All inputs in Group A are HIGH `A:0001` – GPI 0 is HIGH, all other inputs are LOW Group Representation A – Group A (first 16 digital inputs) Each bit represents one input channel 0 – GPI LOW 1 – GPI HIGH Value Range `0000` to `00FF` (8-bit)
3		gpi notify on	This command enables digital input (GPI) change notifications. When enabled, the device monitors input state changes and sends a notification to the host whenever a change is detected. Command Format `gpi notify on` Notification Format `A:XXXX/YYYY` XXXX – Current input state YYYY – Previous input state Description A notification is sent only when a change is detected in any input bit. The value represents the state of all inputs in the group using hexadecimal format. Example `A:00FE/00FF` Previous state: `00FF` Current state: `00FE` This indicates that GPI 0 changed from HIGH (1) to LOW (0), triggering the notification. Group Representation A – Group A (first 16 digital inputs) Each bit represents one input channel 0 – GPI LOW 1 – GPI HIGH Value Range `0000` to `00FF` (8-bit)
4		gpi notify off	This command disables the GPI change notification feature. Command Format `gpi notify off` Response Format `Gpi Notify Disabled` Description Disables automatic notifications for digital input state changes. Once disabled, the device will no longer send updates to the host when input states change. Example `gpi notify off` Disables GPI change notifications
5		gpi notify get	This command returns whether the GPI change notification feature is enabled or disabled. Command Format `gpi notify get` Response Format `Gpi Notify Enabled` or `Gpi Notify Disabled` Description Returns the current status of the gpi change notification feature. Example `gpi notify get` Returns `Gpi Notify Enabled` or `Gpi Notify Disabled`

Field	Description
Username	You can change your username by entering a new one in the provided field. Make sure to choose a unique and memorable username for easy access.
Password	Enter your new password here. Please follow the password strength requirements to ensure your password is strong and secure.
Confirm Password	Re-enter the new password here to confirm that both entries match. If they do not match, an error message will appear to help you correct it.

No.	Command	Example	Description
1	relay	relay on xxx	This command turns ON a specific relay channel. Command Format `relay on xxx` xxx – Relay number (Range: 000 to 007, numbering starts from 0) Description Turns ON the selected relay channel. Example `relay on 000` Turns ON Relay 0 Notes Ensure the relay number is within the valid range (000–007). The command immediately updates the relay state. If a relay is mapped to smart action or relay timer, manual control will be restricted
2		relay off xxx	This command turns OFF a specific relay channel. Command Format `relay off xxx` xxx – Relay number (Range: 000 to 007, numbering starts from 0) Description Turns OFF the selected relay channel. Example `relay off 000` Turns OFF Relay 0 Notes Ensure the relay number is within the valid range (000–007). The command immediately updates the relay state. If a relay is mapped to smart action or relay timer, manual control will be restricted
3		relay status xxx	This command returns the current status of a specific relay channel. Command Format `relay status xxx` xxx – Relay number (Range: 000 to 007, numbering starts from 0) Response Format `on or off` on – Relay is ON off – Relay is OFF Description Returns the current state of the selected relay channel. Example `relay status 000` Returns status of Relay 0 Notes Ensure the relay number is within the valid range (000–007). The response reflects the real-time state of the relay at the moment of execution.
4		relay status	This command reads the current status of all relays in a single operation. Command Format `relay status` Response Format `A:XXXX` XXXX – Current relay state (hexadecimal value) Description The returned value represents the state of all relays in the selected group. Each bit corresponds to one relay channel. 0 – Relay OFF 1 – Relay ON Example `A:0000` – All relays are OFF `A:00FF` – All relays are ON Group Representation A – Group A (first 16 relays. ) Each bit represents one relay channel. Value Range WR8: `0000` to `00FF` (8-bit) WR16: `0000` to `FFFF` (16-bit)
5		relay on all	This command turns ON all relay channels. Command Format `relay on all` Description Turns ON all relays in a single operation, regardless of their current state. Example `relay on all` Turns ON all relays Notes This command immediately sets all relay outputs to ON. It overrides any previously set relay states. If a relay is mapped to smart action or relay timer, manual control will be restricted
6		relay off all	This command turns OFF all relay channels. Command Format `relay off all` Description Turns OFF all relays in a single operation, regardless of their current state. Example `relay off all` Turns OFF all relays Notes This command immediately sets all relay outputs to OFF. It overrides any previously set relay states. If a relay is mapped to smart action or relay timer, manual control will be restricted
7		relay write A 00xx	This command controls all relays in a single operation using a hexadecimal value. Command Format `relay write G xxxx` G – Relay group identifier A – Group A (relays 0 to 15) xxxx – Relay state value (hexadecimal) Description Sets the state of multiple relays simultaneously. Each bit in the hexadecimal value represents one relay in the group. Bit Representation 0 – Relay OFF 1 – Relay ON Example `relay write A 00FF` – Turns ON all relays in Group A Value Range WR8: `0000` to `00FF` (8-bit) WR16: `0000` to `FFFF` (16-bit) Notes Each bit position corresponds to a relay channel within the group. Ensure correct bit mapping to avoid unintended relay switching. If a relay is mapped to smart action or relay timer, manual control will be restricted
8		relay pwron A 00xx	This command sets the relay power-on state for the module. Command Format `relay pwron G xxxx` G – Relay group identifier A – Group A (first 16 relays) xxxx – Relay state value (hexadecimal) Description Defines the relay states that will be applied when the device powers on or resets. Each bit in the hexadecimal value represents the state of a relay. Bit Representation 0 – Relay OFF 1 – Relay ON Example `relay pwron A 0003` 0000 0000 0000 0011 → Relays 0 and 1 ON, all others OFF Value Range WR8: `0000` to `00FF` (8-bit) WR16: `0000` to `FFFF` (16-bit) Notes The configured state is applied on device power-up or reset. Ensure correct bit mapping to avoid unintended relay activation. If a relay is mapped to smart action or relay timer, manual control will be restricted
		relay pwron get	This command reads the power-on status of all relays in a single operation. Command Format `relay pwron get` Response Format `A:XXXX` XXXX – Power-On values of the relays (hexadecimal value) Description The returned value represents the state of all relays in the selected group. Each bit corresponds to one relay channel. 0 – Relay OFF 1 – Relay ON Example `A:0000` – All relays are OFF `A:00FF` – All relays are ON Group Representation A – Group A (first 16 relays) Each bit represents one relay channel Value Range WR8: `0000` to `00FF` (8-bit) WR16: `0000` to `FFFF` (16-bit)
		relay pwron disable	This command disables the Relay Power-On feature for all relay channels. Command Format `relay pwron disable` Description Disables power-on feature to all relays. Once disabled, no relay will operate based on power-on settings. Example `relay pwron disable` Disables power-on feature to all relays Notes Use the power-on command to re-enable power-on based behavior.
Relay Timer Commands
9		relay tmr get xxx	This command returns the current configuration and status of a specific relay timer. Command Format `relay tmr get xxx` xxx – Relay number (Range: 000 to 007, numbering starts from 0) Response Format `Mx D:yyyy` M:Mx – Timer mode (M0 [Delayed ON], M1 [Delayed OFF], M2 [Toggle]) D:yyyy – Delay value in seconds Description Returns the timer configuration for the selected relay. Includes the configured timer mode and delay value. Example `relay tmr get 000` Returns timer status for Relay 0 Notes Ensure the relay number is within the valid range (000–007). If no timer is configured and the M0 or M1 delay expires, the response will indicate “timer not active”
10		relay tmr get	This command returns the list of relays with timer configurations. Command Format `relay tmr get` Response Format `xxx xxx xxx` xxx – Relay numbers with timer configured Description Returns a list of relay channels for which timer functionality is currently configured. Only relays with active timer settings are included in the response. Example `relay tmr get` `000 002 005` Indicates that relay timers are configured on Relay 0, 2, and 5. Notes If no relay timers are configured, the response may indicate an empty or default state. Use `relay tmr get xxx` for detailed timer configuration of a specific relay.
11		relay tmr disable xxx	This command disables the relay timer configuration for the specified relay channel. Command Format `relay tmr disable xxx` xxx – Relay number (Range: 000 to 007) Description Disables the timer configured for the selected relay. Once disabled, the relay will no longer operate based on timer settings. Example `relay tmr disable 000` Disables timer for Relay 0 Notes Ensure the relay number is within the valid range (000–007).
12		relay tmr disable	This command disables the Relay Timer feature for all relay channels. Command Format `relay tmr disable` Description Disables all configured relay timers. Once disabled, no relay will operate based on timer settings. Example `relay tmr disable` Disables all relay timer operations Notes Use the timer configuration command to re-enable timer-based behavior.
13		relay tmr [relay_number] [timer_mode] [timer_delay]	This command configures the timer behavior of a specific relay channel, enabling precise control over relay operation based on time. Command Format `relay tmr xxx mode delay` xxx – Relay number (Range: 000 to 007) mode – Defines the operating mode of the relay timer M0 – Delayed ON M1 – Delayed OFF M2 – Toggle Timer delay – Time delay in seconds (Range: 1 to 3600 seconds) Description Configures time-based behavior for the selected relay channel. The relay action depends on the selected mode and delay value. Examples `relay tmr 000 M0 1` – Turns ON Relay 0 after a delay of 1 second `relay tmr 000 M1 4` – Turns OFF Relay 0 after a delay of 4 seconds `relay tmr 000 M2 10` – Toggles Relay 0 every 10 seconds Notes Timer configurations are persistent and remain active even after a power reset. A configured timer continues to operate until it is explicitly disabled or the device is factory reset. If a relay is already mapped to smart action, relay timer cannot be configured If the relay timer mode is set to M0 or M1, the relay becomes available for manual control after the specified delay

No.	Command	Parameters	Example	Description
1	smart	get xxx/ get/ -i xxx/ -r xxx/disable/ [input] [mode] [target_output] [value]	smart get 000, smart -i 000, smart -r 000, smart disable, smart 000 L 000 1	Read configured data, clear configured input, clear configured relay, disable entire smart action feature, configure smart feature
Smart Action Engine Detailed Commands
1	smart	get xxx	smart get 000	This command returns the current Smart Action configuration for a specific digital input channel. Command Format `smart get xxx` xxx – Digital input number (Range: 000 to 007) Response Format `M:L R:000:H` M – Input mode (L: LOW, H: HIGH, F: FOLLOW) R – Relay number H / L – Trigger value (HIGH / LOW) Description Returns the Smart Action settings configured for the selected digital input Includes operating mode, mapped relay outputs, and configured trigger values Example `smart get 000` Returns Smart Action configuration for Digital Input (GPI) 0 Notes Ensure the input number is within the valid range (000–007) If no Smart Action is configured, the response will indicate `I:000 not mapped`
2		get	smart get	This command returns the list of digital inputs that have Smart Action configured. Command Format `smart get` Response Format `Mapped IOs: xxx xxx xxx` xxx – Digital input numbers with Smart Action configured Description Returns a list of digital input channels for which Smart Action is currently configured. Only mapped inputs are included in the response. Example `smart get` `Mapped IOs: 000 001 007` Indicates that Smart Action is configured on Digital Inputs 0, 1, and 7. Notes If no Smart Action is configured, the response may indicate an empty or default state. Use `smart get xxx` for detailed configuration of a specific input.
3		-i xxx	smart -i 000	This command disables the configured digital input for the specified channel. Command Format `smart -i xxx` xxx – Digital input number (Range: 000 to 007) Description Disables the selected digital input channel. Example `smart -i 000` Disables Smart action mapped on digital Input (GPI) 0 Notes Ensure the input number is within the valid range (000–007).
4		-r xxx	smart -r 000	This command disables the configured relay for the specified channel. Command Format `smart -r xxx` xxx – Relay number (Range: 000 to 007) Description Disables the selected relay channel mapped to smart action. Example `smart -r 000` Disables Relay 0 mapped to smart action Notes Ensure the relay number is within the valid range (000–007).
5		disable	smart disable	This command disables the Smart Action feature for all input channels. Command Format `smart disable` Description Disables all configured Smart Actions. Once disabled, no digital input will trigger any relay output based on Smart Action logic. Example `smart disable` Disables Smart Action feature for all inputs
6		smart [input] [mode] [target_output] [value]	smart 000 L 000 1	This command configures the Smart Action feature. Smart Action maps digital inputs to relay outputs and automates relay control based on input state. Command Format `smart xxx mode target_output value` xxx – Digital input number (Range: 000 to 007) mode – Defines the trigger condition for the relay L – Trigger when input is LOW H – Trigger when input is HIGH F – Follow mode (relay follows input state) target_output – Relay to be controlled by the selected digital input (Range: 000 to 007) value – Relay output state when triggered 0 – Relay OFF 1 – Relay ON Not required in F (Follow) mode Description Each command links a digital input (same index as xxx) to a relay output. The relay action depends on the selected mode and trigger condition. Examples `smart 000 L 000 1` – When digital input 0 goes LOW, Relay 0 turns ON `smart 001 H 002 0` – When digital input 1 goes HIGH, Relay 2 turns OFF `smart 003 F 003` – Relay 3 follows digital input 3 (LOW - OFF, HIGH - ON) Notes Digital input index corresponds to the input used in the command. Follow mode (F) continuously mirrors input state without delay. If a relay is mapped to relay timer, the same relay cannot be configured with smart action feature One relay can be mapped to only one input, One input can have multiple relays mapped to it

No.	Command	Parameters	Example	Description
1	fs	get/reset/disable/ [input] [mode] [relay_group] [relay_map]	fs get, fs reset, fs disable, fs 000 L A 0012	Read status of IO failsafe, Manual Reset Failsafe, Disable Failsafe, Configure Failsafe
IO Failsafe Control Detailed Commands
1	fs	get	fs get	This command returns the IO Failsafe configuration for the specified digital input. Command Format `fs get` Response Format `I:xxx M:X G:X V:xxxx` I:xxx – Digital input number M:X – Trigger mode (L: LOW, H: HIGH) G:X – Relay group (e.g., A) V:xxxx – Relay state value (hexadecimal) Description Returns the configured failsafe settings for the selected digital input. Includes trigger mode, relay group, and relay output value. Example `fs get` Returns failsafe configuration for Digital Input 0 Notes If no failsafe is configured, the response will indicate "FS Not Configured".
2		reset	fs reset	This command performs a manual reset of the IO Failsafe condition to resume normal device operation. Command Format `fs reset` Description Clears the active failsafe state triggered by a digital input. Restores normal operation of relay outputs and system behavior. Example `fs reset` Clears the failsafe condition and resumes operation Notes Use this command after resolving the condition that triggered the failsafe. If the trigger condition still exists, the failsafe may be reactivated immediately.
3		disable	fs disable	This command disables the IO Failsafe feature completely. Command Format `fs disable` Description Disables all configured IO Failsafe behavior. Once disabled, digital inputs will no longer trigger failsafe actions. Example `fs disable` Disables IO Failsafe feature Notes Use the configuration command to reactivate failsafe behavior.
4		fs [input] [mode] [relay_group] [relay_value]	fs 000 L A 0012	This command configures the IO Failsafe feature, enabling the module to automatically set relay states based on a defined digital input condition. Command Format `fs xxx mode G xxxx` xxx – Digital input number Note: The IO Failsafe feature currently supports Digital Input 0 only mode – Defines the trigger condition L – Trigger when input is LOW H – Trigger when input is HIGH G – Relay group identifier A – Group A (first 16 relays) xxxx – Relay state value (hexadecimal) Description Defines the relay output state when the specified digital input reaches the configured condition. Each bit in the hexadecimal value represents one relay. Bit Representation 0 – Relay OFF 1 – Relay ON Example Value `0003` – 0000 0000 0000 0011 Relays 0 and 1 ON, all others OFF Value Range WR8: `0000` to `00FF` WR16: `0000` to `FFFF` Examples `fs 000 L A 0012` When Digital Input 0 goes LOW, relays are set according to 0012 Relay 1 and Relay 4 turn ON, all others turn OFF `fs 000 H A 0012` When Digital Input 0 goes HIGH, relays are set according to 0012 Relay 1 and Relay 4 turn ON, all others turn OFF

Field	Description
Device ID	Displays and allows users to set the Device ID.
Firmware Version	Displays the current version of the firmware installed on your device.
Device Serial Number	The serial number specific to your device. This number is used for identification and support purposes.

Action	Description
Reboot	This option allows you to reset the device. Rebooting the device can be useful for applying new configurations and settings.
Config Mode	This option allows you to switch the device to USB Configuration mode
Factory Reset	This option restores the device to its original factory settings, erasing all user-configured settings and data. After a factory reset, the device will return to its default configuration.

Field	Description
MAC Address	Displays the unique MAC address assigned to the device. This address is used to identify the device on the network.
Host Name	Specifies the hostname of the device. The hostname can be customized to easily identify the device on the network.
Enable DHCP	When enabled, the device automatically obtains its IP address and other network parameters from a DHCP server.
IP Address	Displays or specifies the IP address assigned to the device. When DHCP is enabled, this address is assigned automatically.
Subnet Mask	Specifies the subnet mask used to determine the network address range.
Default Gateway	Specifies the gateway address used to communicate with devices outside the local network.

Field	Description
Device ID	Displays Device ID.
Firmware Version	Displays the current version of the firmware installed on your device.
Device Serial Number	The serial number specific to your device. This number is used for identification and support purposes.

Field	Description
SSID	Enter the name of the Wi-Fi network to which the device should connect.
Password	Enter the password for the selected Wi-Fi network.
Host Name	Specifies the hostname used to identify the device on the network.
MAC Address	Displays the MAC address of the Wi-Fi interface.
Enable DHCP Client	When enabled, the device automatically obtains its IP address and other network parameters from the network's DHCP server.
IP Address	Displays or specifies the IP address assigned to the Wi-Fi interface.
Subnet Mask	Specifies the subnet mask for the Wi-Fi network.
Default Gateway	Specifies the gateway address used for communication with other networks or the Internet.
Primary DNS	Specifies the primary DNS server used to resolve domain names into IP addresses.

Setting	Description	Mandatory for MQTT	Mandatory for MQTTS
Broker	Enter the MQTT broker address (IP or domain) with the appropriate protocol prefix (mqtt:// or mqtts://). For example, mqtt://broker.example.com or mqtts://broker.example.com.	YES	YES
Publish Interval (ms)	Set the publish interval in milliseconds. This defines how often the device will send data.	YES	YES
Client ID	Enter a unique Client ID for the device. This ID is used to identify the device on the MQTT broker.	YES	YES
Publish Topic	Define the topic for publishing data to the broker. Devices subscribing to this topic will receive the data.	YES	YES
Message Format	Specify the format of the message being sent to the broker. For example: 1. {Relay: ~rl_val~, Digital Input: ~din_val~}. The values ~rl_val~ and ~din_val~will be replaced by the actual Relay Status and Digital Input data from the device. 2.{"relay": 0,"State":1}. This message is used to control the relay number 0 with an ON state (1).	YES	YES
Username	Enter the Username for authentication if the MQTT broker requires security.	YES, If security is required.	YES, If security is required.
Password	Enter the Password for authentication if the MQTT broker requires security.	YES, If security is required.	YES, If security is required.
CA Certificate	Upload the CA certificate used to verify the broker’s identity. This is required for secure MQTT communication (MQTTS).	NO	YES
Client Certificate	Upload the client certificate used to authenticate the device to the broker in secure communication (MQTTS).	NO	YES
Client Key	Upload the client key associated with the client certificate for encrypted communication (MQTTS).	NO	YES

Ethernet Relay Modules

1.Introduction

Note: In this document, “LEO WR8” refers to the LEO WR 8 Channel Web Relay Module.

Applications

Key Features

2.Technical Specifications

3.How to use the module

3.1.Components/Tools required

3.2.Connection Details

3.3.DC Power Supply

3.4.USB Interface

3.5.Ethernet Connectivity

3.6.Wi-Fi Connectivity

3.7.Relay Contacts

SPDT Variant – [WR8B, WR8B-24]

SPST Variant – [WR8A, WR8A-24]

3.8.Digital Input Contacts

3.9.LED Indication

3.10.Multipurpose Switch

4.Factory Reset

Factory Default Settings

4.1.Powering up LEO WR8 after Factory Reset

5.Smart Action Engine

6.Relay Timer Engine

7.IO Failsafe Control

8.Supported Error Codes

9.Powering Up LEO WR 8 Channel Web Relay Module

10.Device USB Mode

Configure LEO WR8 : 8 Channel Web Relay Module

10.1.USB Configuration

10.2.Network Configuration

11.Device Application Mode

11.1.Accessing the module

11.1.1.Accessing the module using Ethernet web interface

11.1.2.Accessing the module using Wi-Fi web interface

11.1.3.Controlling the module through Telnet interface

11.1.4.Controlling through REST API commands

12.Configuration Command Set

12.1.Device configuration

12.2.Network0 (Ethernet) Configuration

12.3.Network1 (Wi-Fi) Configuration

13.Sending Commands

13.1.The command set

13.2.Device Command Set

13.3.Relay Command Set

13.4.GPI Command Set

14.Standalone Commands

14.1.Smart Action Engine Configuration

14.2.IO Failsafe Control Configuration

15.Ethernet Web Interface

15.1.GPI, Relay Status and Control

15.2.Device Settings

15.2.1.Device Info

15.2.2.User Account

15.2.3.Device Management

15.3.Network Settings

16.Wi-Fi Web Interface

16.1.GPI, Relay Status and Control

16.2.Device Settings

16.2.1.Device Info

16.2.2.User Account

16.2.3.NET1 OTA Firmware Update

16.2.4.Device Management

16.3.Network Settings

16.4.MQTT Settings

17.Additional Information

17.1.Using GPI's with switches

17.2.Using relay modules with inductive loads

18.Mechanical Dimensions

19.FAQ