Control SxL RLY2UH relay module from Raspberry Pi
The script is to be run on Raspberry Pi!
Change the variables relay1_pin and relay2_pin to the pin number connected to SIN1 and SIN2 of the relay module respectivity.
Turn relay 1 on:
RLY2UH_control.py -r 1 on
Turn relay 2 off:
RLY2UH_control.py -r 2 off
Turn off relay 2 after 30 seconds:
RLY2UH_control.py -r 2 -t 30 off
A simple HTTP server is provided to allow control through LAN/Internet.
Start the server:
export FLASK_APP=RLY2UH_http_control.py
cd <path_to_source>
flask run
# If want to expose to the whole network: (do it at your own risk)
flask run --host=0.0.0.0
GET arguments:
- relay=[1|2]
- action=[on|off|toggle]
Example URL:
http://127.0.0.1:5000/relay_control?relay=2&action=toggle
Remote control an USB lamp via SSH on mobile phone: https://www.youtube.com/watch?v=FLi56sj9ToY
Remote control through a smartwatch sending HTTP command: https://youtube.com/shorts/5wBk7VCaKU0
SxL RLY2UH is a USB relay module with USB power input/output, super simple wiring and it can be controlled by simple GPIO signal. You may visit this website to order.