Workshop relay example

Relay module gives us the possibility to protect our Raspberry Pi and to interact with a device that needs a power source higher than 5v, in this example we will see how to use the Relay module with Raspberry Pi.

Wiring

RELAY	Raspberry Pi
-	GND pin
+	+5v pin
Signal	GPIO 21

Code

1- Power your raspberry

You can achive it with connecting it to your pc trought the Micro USB Port of the raspberry pi

2- Connect to your raspberry pi

Using putty if you're on windows, Ssh if you're on a linux based os Follow the following instruction if you dont know how to connect to raspberry pi Connect to Raspberry Pi using Putty

3- Download relay binary file

Assuming you're connected with... copy and past this command If you're using Raspberry zero

curl -O https://raw.githubusercontent.com/ionoid-io-projects/workshop_relay_example/master/bin/arm6/relay

If you're using Raspberry 3 b

curl -O https://raw.githubusercontent.com/ionoid-io-projects/workshop_relay_example/master/bin/arm7/relay

make it executable

chmod +x relay

4- execute binary to make led blink

./relay

How to stop the program

To quit or stop the program click on Ctrl+C

Ressources

http://blog.whatgeek.com.pt/2018/05/use-a-raspberry-pi-and-a-relay-to-control-a-lamp/