With this setup, the Raspberry Pi is used to control and monitor the connected components, which include a capacitive soil moisture sensor, a relay module, a micro submersible mini water pump ...

First, they modified an off-the-shelf bubble machine with a Raspberry Pi and relay module. The Pi can easily trigger the bubbling mechanism by controlling power to the machine using the relay.

Today is Pi Day. 3rd month, 14th day. It's not the 314th day of the year; that’s November 10th.

Runs on the Raspberry Pi Compute Module 4 (CM4), providing reliable performance ... CAN bus, RS232/RS485, ADC, relay control, and digital I/O for seamless integration with other industrial systems.