gogrove

Go library for interacting with GrovePi

Currently only tested with GrovePi firmware version 1.3.0

See examples in example_test.go

The Rasberry Pi communicates with GrovePi over I2C. The following kernel modules are needed to support this:

• i2c_dev
• i2c_bcm2835

To see if the Rasberry Pi is communicating with the Grove pi, run the following:

# sudo i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          03 04 -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- 3e --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- 62 -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

You should see the "04" for the GrovePi and the "3e" and "62" for the LCD.

If these are not showing up, try reloading the i2c_bcm2835 module:

# sudo modprobe i2c_dev
# sudo rmmod i2c_bcm2835
# sudo modprobe i2c_bcm2835

This package is goroutine safe within a session

To cross compile your go app for the Rasberry Pi:

# GOOS=linux GOARCH=arm go build

Some logic within is based on the Python library available here

Useful links:

• port description
• some protocol dicsussion
• main GrovePi page