Logging temperature meter (ltm) is a ESP8266 based temperature measurement and logging device.
ESP32
The project is based on port of an existing ESP8266 Arduino project, and consideration was given to migration to the ESP32 hardware platform, but there are large differences to the WiFi related libraries… so for now, ESP8266 looks ok.
A bigger issue is that the ESP32 ADC is renowned for non-linearity, worse in some modes than others.
One poster offered the following graph of an ESP32 measurement to a discussion.

Some developers have worked on a per device look up table to implement a linearisation scheme. That means each individual device needs to have its input characteristic mapped and then used by the compensation code running on that device. Continue reading Logging temperature meter (ltm) v1 – prototype Vin calibration
Last update: 18th April, 2021, 8:48 AM