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I use an stm32f103 as an io extender for my esp32-a1s, they cost about 2$ per board and the chip programmer cost about 10$. I use I2C to communicate between the
by nick__m 3y ago
I use an stm32f103 as an io extender for my esp32-a1s, they cost about 2$ per board and the chip programmer cost about 10$. I use I2C to communicate between the esp32 and the stm32.
I do my development in VSCode using platformio with the Arduino framework and FreeRTOS. It is really convenient to have the same os and framework used for all the MCUs of a project. That's why I use the 2$ stm32 instead of a 1$ stm8.
- HeyLaughingBoy 3y agoYeah, I decided to use an "Arduino" 10MT "PLC" board as my I/O extender since it comes with optically isolated inputs, 4-20mA analog input and a 24VDC power input, all of which I can use. At the improbable price of $22.75!
- nick__m 3y agoThank you, I did not know about those PLC, it's incredible what you can obtain for that price.