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.

Features

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

Specifications

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

Pinout

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

Distance

Grove - Button

On/Off

Grove - Electricity Sensor

Electricity

Grove - Gas Sensor(MQ2&MQ5)

Gas Quality

Grove - Light Sensor

Light

Grove - Magnetic Switch

Magnetic

Grove - Moisture Sensor

Moisture

Grove - PIR Motion Sensor

PIR Motion

Grove - Rotary Angle Sensor

Rotary Angle

Grove - Tilt Switch

Object Position

Grove - Sound Sensor

Sound

Grove - Temperature Sensor

Temperature

Grove - Touch Sensor

Human touch

Grove - Water Sensor

Water

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

LED On

Grove - Vibrator

Vibrate

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.