AT command not send but blue LED stays on I am new to working with Arduino Uno and ESP8266.

Firstly I connected an ESP8266 to an Arduino Uno like so:


TX to TX, 
RX to RX, 
GND to GND, 
VCC to 3.3V,
CH_PD to 3.3V and
adding RESET to GND on the Arduino Uno.


After completing the wire connection, I opened the Arduino IDE serial monitor, where it always shows symbols and text and I set baud rate 115200 and adjusted both NL and CR.

After all of that, when I send an AT command, then no response is shown.
TX is an output. RX is an input.

By connecting TX to TX and RX to RX you have connected an output to an output, and an input to an input.

You need to connect the TXs to the other RXs.

Also: see (NEWBIE) Sending AT Command from Arduino UNO to ESP8266 doesn&#39;t work