This must be a question that is asked a million times on this forum..!
I'm connecting an arduino uno rev3 to a Esp8266-01s module.
I'm following these setups: https://cordobo.com/2300-flash-esp8266- ... duino-uno/
The arduino is in reset mode and i'm using the arduino ide serial monitor to send commands.
If I don't use a voltage divider, it works. I can send commands and replies are sent (115200 baud, NL+CR). But I was afraid this would damage it in the long run?
If I use a voltage divider with three 1k resistors, when I power the board the TX blue led stays on and nothing happens. The circuit is:
ARDUINO_TX -> 1k ----> 1k -> 1k -> GND
Could anyone please help out? what is going on?
Thanks a lot!