I installed micropython on my esp32 for easier coding - no more waiting for the arduino code to recompile, and easy testing of new code.
All good for now.
A few problems started to appear.
When using a LCD a ST7735 the refresh is very slow, you can see the screen being painted from top to bottom. Its not terrible but not that great, on arduino with C code was fine.
Second problem, when I tried to log some data online with urequest, or even with sockets.
I started to get: OSError: (-29312, 'MBEDTLS_ERR_SSL_CONN_EOF')
The problem comes from SSL part - if the server is using anything more powerfull then RSA for the HTTPS certificate we have a problem.
ESP32 is left with too little memory and cpu from running micropython.
Two solutions.
If you remove the TFT library it works, but this is not really a solution, since I want the data displayed on the screen as well.
I went through the library and started to remove pieces of code not required, like they have 3 functions to initrb, initrg, initrr - to initialize the screen with red, green or blue. Just keep the red one and remove the others.
I also removed the drawing functions like circle, line, rect etc - I only needed text.
After this trimming, I got the first success, urequests actually working, but not all the time.
So second solution was to ditch the HTTPS.
Setup the server to accept http. Then it works fine.
