This summer I created a pool temperature monitoring and pump control system using a Pi Zero W. This article gives an overview of the system and how I put it together. It allows the temperature of the air and water to be displayed on a web page while automatically turning the pump on and off according to a preset schedule.
We originally had an 8ft Bestway “fast set” pool with an inflatable ring around the top. This proved to be slightly incompatible with the 3 cats we share the garden with. So this year we changed it for a 10ft metal framed “Summer Escapes” pool. It holds 4100 litres of water and I had no idea what temperature the water ever reached or how this related to the air temperature. I also had no way of easily controlling the pump without fiddling with the settings on a mains timer.
I decided I should be able to create a system that could :
Measure the air and water temperature
Log temperatures to the internet
Display temperatures on a web page accessible from a mobile phone
Allow the pump to be turned on, off or placed in an automatic mode that would follow a schedule
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.