# 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](https://app.gitbook.com/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 \\ ### Get Started with Pre-programmed Firmware ![](https://github.com/SeeedDocument/Grove-Node/raw/master/img/Milcandy_IFTTT.jpg) 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* ![](https://github.com/SeeedDocument/Grove-Node/raw/master/img/Mil_Grove_con.png) 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](https://app.gitbook.com/Grove-Light_Sensor) and a [Grove\_-\_LED](https://app.gitbook.com/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. ## Over-The-Air 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](https://play.google.com/store/apps/details?id=no.nordicsemi.android.mcp) to upgrade the BLE app ![](https://github.com/SeeedDocument/Grove-Node/raw/master/img/Ota-ui.png) More information can be found at [mbed.org](https://developer.mbed.org/teams/Bluetooth-Low-Energy/wiki/Firmware-Over-the-Air-FOTA-Updates). ## Develop New Application See [ble on mbed.org](http://developer.mbed.org/teams/Bluetooth-Low-Energy/) ## Resources * [Grove - Node v1.0 schematic pdf file](https://github.com/SeeedDocument/Grove-Node/raw/master/res/Grove-Node_v1.0.pdf) * [Grove - Node v1.0 eagle design file](https://github.com/SeeedDocument/Grove-Node/raw/master/res/Grove-Node_v1.0_eagle.zip) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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