I just can’t find a microcontroller for my project (not arduino), what do you advise?

Question

Do it yourself

Wireless communication is required between the smartphone and the device, the device is battery powered, the data sent to the device is displayed on the LCD screen, what should I take as a wireless communication method?

Answer 1

Bluetooth module HC-05 .

Answer 2

ESP8266 if not so critical with consumption. The functionality is very large and it is quite easy to write firmware.

Answer 3

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