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)