It's been a long time since I posted anything here, but I've started building the new version. While the software remains the same, the new hardware is built in a modular way. There's a main board with multiple parallel slots (each one is identical) and cards that can be plugged into it.

The cards are:

• CPU: STM32 board with some minimal peripherals

• Storage: ESP32 that will send data outside, SD card slot

• Acquisition: BNC connectors, UART connectors

• HMI: display, keyboard, phototransistor to detect how much to dim the display at night

The idea is that, in this way:

• if one part needs changes or redesign, the other parts can still be used

• new boards can be added in the future

• PCB manufacturing in China is so cheap these days that it's economically reasonable