# Seeedstudio Grove interface

<abstract>
Grove is a modular, standardized connector prototyping system made 
by the company Seeed studio. 
</abstract>

* <a href="http://wiki.seeed.cc/Grove_System" target="_blank">Grove Ecosystem Introduction</a>

The Grove port only supports the I2C Grove modules. We have tested only a few modules, but this
should be the list of module compatible with this port.

* [Grove I2C modules](https://www.seeedstudio.com/catalogsearch/result/?q=grove%20i2c) 

<img src="./grove_connectors.jpg" class="img-responsive">

The GPIO port used for Grove are:

* GPIO 44 - SDA
* GPIO 45 - SCL

Install the <code>i2c-tools</code> package by typing:

	$ sudo apt update
	$ sudo apt install i2c-tools

then check if your module is detected on the I2C bus by using this command:

	$ i2cdetect -y 1

### Schematic

<img src="./grove-1-schematic.jpg" class="img-responsive">

### config.txt definition

To use the GPIO 44 and GPIO 45 lines as I2C bus insert this line in
__/boot/config.txt__ and reboot the Raspberry Pi.

	#Set the I2C1 interface on GPIO44 and 45
	dtparam=i2c_arm=on
	dtparam=i2c_arm_baudrate=400000
	dtoverlay=i2c1-bcm2708,sda1_pin=44,scl1_pin=45,pin_func=6

* <https://github.com/raspberrypi/linux/blob/rpi-4.9.y/arch/arm/boot/dts/overlays/README#L783>

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