Grove Node
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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 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
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>
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
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:
power off the Grove Node
do a double-clicks on the Grove Node's button
the red LED will be on and a BLE device named SD7DFU can be scaned
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 and a .
use to upgrade the BLE app
More information can be found at .
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