Yeah, looked at CAN then decided the wi-fi mesh.

Left the 2 I2C resistors as through hole as from what I was reading the value depends on devices, distance, etc.

The PCB is now in production but I added 2 more push buttons.

Hi, I want to use ESP32 in a mesh to control hydroponics/aquaponics etc. One will act as a master and control everything, the "slaves" just send data when asked and action stuff when asked as only the master knows the layout. Anyway, my PCB makes it easier to attach many I/O pins and multiple SPI, I...

I've been "cannibalizing" a copy of the SPI code that uses the 64 byte FIFO. :shock: The original code was not too bad but had a lot of overhead and locking that was not needed. First iteration of moving some stuff to inline and removing (via some #define's) locking and checking. A lot of the code h...

Had 2 ESP8266's given to me some time back and finally got to experiment with them. Not bad little units but the SRAM got eaten a bit and since the ESP32 was available... IMO makes the ESP8266 redundant if wanting some RAM and extra CPU cycles. In defence of the ESP8266 it still had 40K+ of SRAM lef...

Been looking at the ESP8266 and "adjusted" the SPI library a bit and getting 40+ fps using SPI and a SSD1351 @16BPP. As stated above, the real limiting factor is the real RAM available as the buffer for the screen itself is 32K!!!! The other factor is unlike the Arduino Due or Teensy reading from fl...