Heatpump controller with web interface


The first basic ideas on paper. The Wemos D1 mini functions as controller.

It has a lot of code flashROM, sufficient RAM and enough I/O like WiFi, RS232,I2C/SPI, USB, 1 analog port and some digital I/O.




The web interface:














Wemos D1 mini:



This is the first prototype PCB. The 4 green connectors for NTC input. But because the Wemos only has 1 analog input, an external 4 channel (I2) ADC is added. (not on this photo).










Here you see the small ADC added (on the right side).It communicates via I2C with the Wemos D1 mini.