Elecrow
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 ...
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
- A common digital temperature sensor often sold in waterproof probe form. It matters here because the kit does not include temperature measurement, and a DS18B20 is the suggested add-on if your water readings need temperature context.
- 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 plug-in connector ecosystem for sensors and modules that avoids soldering and jumper wires. Grove compatibility matters because it can make it quicker to add supported I2C devices, as long as the cable and voltage are suitable.
- 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 chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- OTA
- OTA means over-the-air updating, where firmware is updated wirelessly instead of through a programming cable. It matters because you may be able to update or maintain the module after it is installed in a project.
- 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.
Find this product in
Connectivity
Related Tutorials
Free guides on learn.littlebird.com.au
