Grove Node

Grove - Node is a simple and flexible electronic module to connect physical objects. It's based on the idea of IFTTT (IF-This-Then-That). It has two Grove connectors to access a variety of Grove modules. With pre-programming IFTTT firmware, it's easy to create physical objects with analog sensors and 0/1 actuators.

It integrates Bluetooth Low Energy (BLE) which makes it extremely easy to interact with phones and tablets. To extend its usability, a DFU bootloader is built in to reprogram it Over-The-Air through BLE. It supports ARM mbed platform to write new firmware with hundreds of libraries.


  • IFTTT pattern to use

  • Two Grove connectors for sensors and actuators

    • Plug-Play with analog sensors and high/low actuators

      • Flexible 4 GPIOs, all can be used for PWM, ADC, I2C and UART

  • Nordic nRF51822 Multi-protocol Bluetooth® 4.0 low energy/2.4GHz RF SoC

    • ARM Cortex-M0 processor

      • 256kB flash, 16kB RAM

  • On board battery charge circuit

  • OTA firmware

  • mbed enabled

    • Online IDE

      • Easy to use C/C++ SDK

      • Handy libraries


  • Operating voltage: 3.3Vdc

  • Battery capacity: 80mAH

  • Maximum charge current: 100mA

  • Grove Interface supply Voltage:3.3V

  • Grove Interface supply Current: 100mA max

  • Grove Interface input Voltage:0~3.3V


Get Started

  • Turn On Grove Node

Connect Grove Node with a battery or a USB cable and then press its button, it will run.

* Double Clicks - run its bootloader, the red LED will be on. * Otherwise - run its application, the green LED will blink.

  • Turn Off Grove Node

  • In bootloader mode - wait for a while to run into the application.

  • In application mode - long press the button wait until all LEDs are off </dd></dl>

Get Started with Pre-programmed Firmware

First, we need an Input Grove module to sense the physical world. Pre-programmed firmware only supports an analog input sensor or 0/1 digital input sensor. The following Grove modules from Seeedstudio can be used as an Input:

Module name

Parameter to measure

Grove - 80cm Infrared Proximity Sensor


Grove - Button


Grove - Electricity Sensor


Grove - Gas Sensor(MQ2&MQ5)

Gas Quality

Grove - Light Sensor


Grove - Magnetic Switch


Grove - Moisture Sensor


Grove - PIR Motion Sensor

PIR Motion

Grove - Rotary Angle Sensor

Rotary Angle

Grove - Tilt Switch

Object Position

Grove - Sound Sensor


Grove - Temperature Sensor


Grove - Touch Sensor

Human touch

Grove - Water Sensor


Other analog sensors which is not Grove-compatible need a little small adjustment. Just connect your signal output to pin4 of Grove connector and then the VCC and GND. Note that only sensors that output an analog or digital 1/0 value can be used with the pre-programmed firmware

Second, we need an output Grove module as an actuator. The following Grove modules can be used:

Module name

Action when triggered

Grove - Buzzer

Buzzer enabled

Grove - LED


Grove - Vibrator


Grove - Relay

Swith On/Off other circuits

For example, we intend to create a light which automatically turns on if the environment is dark and turns off if otherwise, then we select a Grove_-_Light_Sensor and a Grove_-_LED.

Third, teach the Grove Node a logic.

Connect the light sensor as an input and the LED as an output, and then turn on the Grove Node.

  • In a normal environment, do a single-click on the Grove Node's button

  • Cover the light sensor with a hand to simulate a dark environment, and then do a double-clicks, the Grove - LED will be on.

  • Release the light sensor, the Grove - LED will be off.


The Grove Node has a pre-programmed OTA bootloader. To run into the bootloader:

  1. power off the Grove Node

  2. do a double-clicks on the Grove Node's button

  3. the red LED will be on and a BLE device named SD7DFU can be scaned

  4. use nRF Master Control Panel to upgrade the BLE app

More information can be found at

Develop New Application

See ble on


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