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I just got a couple of ESP32-S3 devices direct from China (AliExpress), one with a 5" TFT screen and the other with a 7". I don't know what home assistant is,
by HeyLaughingBoy 3y ago
I just got a couple of ESP32-S3 devices direct from China (AliExpress), one with a 5" TFT screen and the other with a 7".
I don't know what home assistant is, but these will run C++ or MicroPython just fine. My application is an industrial controller and they are really nice. Dirt cheap at around $30 each shipped (arrived in just over 2 weeks) to USA.
[edit] They have very little I/O since the display is driven in parallel mode and that takes up most of the EPS32 pins. There's a SPI connector and a couple other pins that could probably be redirected for I2C. I haven't gotten around to to checking that. I did use one of the available pins for serial input to read a GPS module and that was trivial to setup though.
- nick__m 3y agoI use an stm32f103 as an io extender for my esp32-a1s, they cost about 2$ 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.