user33668: I want to make a very simple webserver who sends welcome message to anyone who joins it using WiFi.
I have a ESP8266MOD module, I want to program it using arduino ide and arduino uno board.
How I can use arduino uno to program this WiFi module without using urat USB serial board?
SoftwareSerial.h is not working with esp.write() command, I believe it is because of low power, can anyone suggest me on power supply too?
Thanks in advance,
Mohan

user37349: When you use the Uno for its UART only, i.e. grounding RST pin, its Rx pin 0 becomes Tx, and Tx pin 1 becomes Rx -- because that's what pins on the UART you are connecting to. AppMonk didn't say what specific breakout/ chip mount he's using, there are many, or say how he's managing level-shifting from the Uno to the ESP if needed. The Tx pin on Uno (0, labeled Rx) is putting out 5v and the ESP would prefer 3.3, so level shifting w/ simple voltage divider is recommended. You don't need to level shift the Tx signal from ESP to Arduino's Rx (pin 1).

33668: <p>I want to make a very simple webserver who sends welcome message to anyone who joins it using WiFi.</p>

<p>I have a ESP8266MOD module, I want to program it using arduino ide and arduino uno board.
How I can use arduino uno to program this WiFi module without using urat USB serial board?</p>

<p>SoftwareSerial.h is not working with esp.write() command, I believe it is because of low power, can anyone suggest me on power supply too?</p>

<p>Thanks in advance,</p>

<p>Mohan</p>
 37349: <p>When you use the Uno for its UART only, i.e. grounding RST pin, its Rx pin 0 becomes Tx, and Tx pin 1 becomes Rx -- because that's what pins on the UART you are connecting to. AppMonk didn't say what specific breakout/ chip mount he's using, there are many, or say how he's managing level-shifting from the Uno to the ESP if needed. The Tx pin on Uno (0, labeled Rx) is putting out 5v and the ESP would prefer 3.3, so level shifting w/ simple voltage divider is recommended. You don't need to level shift the Tx signal from ESP to Arduino's Rx (pin 1).</p>
