I have connected Arduino Rx(pin 0) to Bluetooth module Rx pin. Tx od Arduino to Tx of Bluetooth . I am able to send command to Bluetooth module using Serial Monitor of Arduino on my PC.
I have uploaded the empty code in Arduino.
I want to know why we connected Tx to Tx and Rx to Rx i.e one to one connection?
If I send command "AT" from my PC using serial Monitor of Arduino , How is it flowing to Bluetooth module.
Why not we connect Rx to Tx pin in AT Mode of Bluetooth module?
Pls explain using diagram.