stevo01 / rpi_gpioctrl

The project includes sample for raspberry PI GPIO access with MQTT protocol.

Overview

The project includes sample for access to RaspberryPi GPIO ports with MQTT protocol.

The current implementation allows you to control eight outputs of raspberry PI Board. The following table shows the mapping of the PINS.

number	GPIO Port on RaspberryPi	comment
1	4
2	17
3	18
4	27
5	22
6	23
7	24
8	10

install mqtt message broker and git on your raspberry pi

execute following commands tio install required software packages on your raspberry pi

sudo apt install mosquitto mosquitto-clients git python3 python-pip3
pip3 install paho-mqtt

clone project and start application

execute following commands on your raspberry pi to clone the repository:

cd /home/pi
git clone https://github.com/stevo01/RPi_gpioctrl

execute following commands to start the mqtt client

cd /home/pi
python3 mqtt_client.py

autostart

sudo chmod +x gpio_mqtt_client.sh
sudo cp gpio_mqtt_client.sh /etc/init.d/
systemctl daemon-reload

test application with command line

monitor all toppics on raspberry message broker

mosquitto_sub -h 192.168.1.80 -t /# -q 1

switch first GPIO on and off

mosquitto_pub -h 192.168.1.80 -t /gpio/switch/1 -m '1'
sleep 1
mosquitto_pub -h 192.168.1.80 -t /gpio/switch/1 -m '0'

control application with MQTT dash (android implementation of MQTT client)

Install and start Mqtt dash (from google app store)

see https://play.google.com/store/apps/details?id=net.routix.mqttdash&hl=de for further informations

configure MQTT dash

t.b.d

MQTT toppic description

the following table liste all used toppics and message content:

toppic	message	comment
/gpio/switch/1	"0" or "1"	"0" - set port 1 to low, "1" = set port 1 to high
/gpio/switch/2	"0" or "1"	"0" - set port 2 to low, "1" = set port 2 to high
/gpio/switch/3	"0" or "1"	"0" - set port 3 to low, "1" = set port 3 to high
/gpio/switch/4	"0" or "1"	"0" - set port 4 to low, "1" = set port 4 to high
/gpio/switch/5	"0" or "1"	"0" - set port 5 to low, "1" = set port 5 to high
/gpio/switch/6	"0" or "1"	"0" - set port 6 to low, "1" = set port 6 to high
/gpio/switch/7	"0" or "1"	"0" - set port 7 to low, "1" = set port 7 to high
/gpio/switch/8	"0" or "1"	"0" - set port 8 to low, "1" = set port 8 to high

Bookmarks

https://play.google.com/store/apps/details?id=net.routix.mqttdash&hl=de for further info

http://blog.scphillips.com/posts/2013/07/getting-a-python-script-to-run-in-the-background-as-a-service-on-boot/