I’ve put together PlatformIO library for connecting ESP32 boards to the Arduino* Science Journal App via BLE (Android / iOS). In my case, the boards are 10# generic ones from Aliexpress. The code is on Github here.
* Previously Google Science Journal
It is by no means ‘my code’ BTW. All I have done is to refactor the code from this repo so you can quickly-and-easily to add it to ESP32 projects as a library dependency. Then you can graph and record sensor data in the phone app. Thought it might be useful in this library-form for others too.
Its a WIP.
Usage instruction in the readme, but in a nutshell and the following dependency to your platformio.ini file:
lib_deps = https://github.com/aegis1980/esp32-science-journal.git