rpi-devices

rpi-devices implements the drivers of devices or sensors for raspberry pi in pure golang. The drivers for the sensors below have been implemented, and I will keep developing for new sensors.

Sensors	Image	Description	Example	App
ADS1015		Analog-to-digital converter	N/A	joystick
Button		Button module	example	vedio-monitor
Buzzer		Buzzer module	N/A	car, door-dog
Collision Switch		A switch for deteching collision	example	car
DHT11		Temperature & Humidity sensor	example	home-asst
DS18B20		Temperature sensor	example	auto-fan
Encoder		Encoder sensor	example	car
GPS		location sensor	example	gps-tracker
GY-25		angle sensor	example	car
HC-SR04		ultrasonic distance meter	example	auto-light, doordog
Infrared		Infrared sensor	example	N/A
Joystick		XY Dual Axis Joystick	example	car
L298N		motor driver	N/A	car
LC12S		2.4g wireless module	example	car
Led		Led light	example	car, vedio-monitor
Led Display		led digital module	example	auto-air
MPU6050		6-axis motion sensor	example	N/A
Oled		Oled display module	example	home-asst
PCF8591		Analog-to-digital converter	N/A	N/A
PMS7003		Air quality sensor	example	auto-air
Relay		Relay module	example	auto-fan
RX480E-4		Wireless remote control	example	remote-light
SG90		Servo motor	example	auto-air, car, vedio-monitor
Step Motor		Step motor	example	N/A
SW-420		Shaking sensor	example	auto-air-out
US-100		ultrasonic distance meter	example	car
Voice		Voice sensor	N/A	N/A
ZE08-CH2O		CH2O sensor	example	ch2o-monitor

Compile & Deploy

It is very easy to cross-compile and deploy for golang. It is an example that compiles the binary for raspberry pi on MacOS.

$ CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=6 go build -o test main.go

If you aren't sure the cpu info of your raspberry pi, check it out by,

$ lscpu
# those are the cpu info of my raspberry pi 2.
# ------------------------------------------------------------
# Architecture:        armv6l
# Byte Order:          Little Endian
# CPU(s):              1
# On-line CPU(s) list: 0
# Thread(s) per core:  1
# Core(s) per socket:  1
# Socket(s):           1
# Vendor ID:           ARM
# Model:               7
# Model name:          ARM1176
# Stepping:            r0p7
# CPU max MHz:         700.0000
# CPU min MHz:         700.0000
# BogoMIPS:            697.95
# Flags:               half thumb fastmult vfp edsp java tls
# ------------------------------------------------------------

And then, deploy the binary to your raspberry pi by,

$ scp test pi@192.168.31.57:/home/pi

192.168.31.57 is the ip address of my raspberry pi, you need to replace it with yours.

ssh to you raspberry pi, and run the binary.

# from /home/pi
$ ssh pi@192.168.31.57
$ ./test

# or, run it in background
$ nohub ./test > test.log 2>&1 &

App

Using the driver programs, I built several applications. The most complex and interesting project is the self-driving car, more than 10 sensers were used to build the smart car. I highlight few interesting apps here, please go to app for all apps I development. You can learn how to use the driver programs from my apps.

Self-Dirving Car

play the video on youtube.

Video Monitor

Auto-Air

Auto-Light