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Devicter Relay 1 Node V1.0 (ATmega 328) – with support OTA update
The devDuino Relay 1 Node V1.0 is a compact Arduino-compatible microcontroller board with a built-in mains power supply (110–220 V AC), a 10 A relay, and an ...
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The devDuino Relay 1 Node V1.0 is a compact Arduino-compatible microcontroller board with a built-in mains power supply (110–220 V AC), a 10 A relay, and an nRF24L01+ wireless transceiver. It is designed for building wireless home automation networks with support for over-the-air (OTA) firmware updates and data encryption.
The board includes an integrated ACS712 current sensor (20 A), on-board SPI flash for OTA updates, an ATSHA204A encryption chip, and GROVE-compatible connectors for easy sensor expansion. It runs the UNO Optiboot bootloader and can be programmed via a standard FTDI header.
Key Features
- Arduino Compatible – ATmega 328 with UNO Optiboot bootloader
- nRF24L01+ Transceiver – Built-in wireless for sensor network communication
- 10 A Relay – On-board relay for mains switching
- ACS712 Current Sensor – Integrated 20 A current measurement
- OTA Firmware Updates – 64 KB on-board SPI flash/EEPROM
- Data Encryption – ATSHA204A security chip
- Mains Powered – Built-in 110–220 V AC power supply
- GROVE Connectors – 1× I2C, 1× 2-pin digital
Specifications
- Microcontroller: ATmega 328
- Bootloader: UNO Optiboot
- Clock Frequency: 16 MHz
- Wireless: nRF24L01+ (mini)
- Relay Rating: 10 A
- Current Sensor: ACS712, 20 A
- Flash (OTA): 64 KB SPI
- Encryption: ATSHA204A
- Power Supply: 110–220 V AC
- Programming: FTDI header, ICSP header
- Expansion: 2× GROVE connectors (I2C, digital), DS18B20 temperature sensor header
- LEDs: 3 (user, power, relay)
- Dimensions: 32 mm × 68.5 mm
Ideal For
- Wireless home automation and smart switches
- Remote monitoring with nRF24L01+ sensor networks
- Smart thermostats and relay control
- Current monitoring for mains appliances
Package Contents
- 1× devDuino Relay 1 Node V1.0 (ATmega 328)
Jargon buster
Plain-language definitions for the technical terms used above.
- Bootloader
- Small starter software on a microcontroller that lets new code be uploaded before the main program runs. Knowing how to enter bootloader mode matters when you need to program the board or recover it after a faulty sketch.
- DS18B20
- The DS18B20 is a common digital temperature sensor, often supplied in a waterproof stainless-steel probe, that sends its readings to a microcontroller over a 1-Wire connection. It is a typical choice for adding temperature data to environmental or water-monitoring projects.
- EEPROM
- A type of non-volatile memory that keeps stored data even when power is turned off. In a sensor module, it can be used to store settings or calibration data so they do not need to be re-entered every time.
- Grove
- Grove is a standardised 4-pin plug-in connector system for sensors and modules that avoids soldering and jumper wires, with different cable types carrying I2C, UART, analogue or digital signals. When a product is Grove-compatible it can be quicker to connect supported modules, provided the connector type, signal and voltage all match.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- OTA
- OTA means over-the-air updating, where a device's firmware is updated wirelessly rather than through a programming cable. This lets firmware be updated or maintained after a device is installed without a physical connection.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
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Connectivity
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