If you want your Arduino to transmit data with other device or control PWM, I/O pin, serial communication of the Arduino by PC or phone client. Trust me, you definitely don't want to miss it- our Elecrow ESPduino! It will he https://elecena.pl/product/7560121/crowduino-uno-esp8266-v1-1 2017-02-01 https://elecena.pl/product/7560121/crowduino-uno-esp8266-v1-1 2017-02-02 https://elecena.pl/product/7560121/crowduino-uno-esp8266-v1-1 2017-02-06 https://elecena.pl/product/7560121/crowduino-uno-esp8266-v1-1 2025-12-17