Why is the ESP8266 not responding to the AT commands?

Why is the ESP8266 not responding to the AT commands?

Seems like you didnt used any type of voltage divider or level shifter between the Arduino Tx -> ESP8266 RX Line. The ESP8266 isnt really 5V friendly. Too Bad the Arduino outputs 5V on all of it Pins. You could still try it With a Voltage Divider using 2 Resistors or a level Shifter in hope it works.

How is the ESP8266 connected to the Arduino Uno?

I have already made the connections between the ESP8266 and the Arduino Uno which are : The VCC and chid pind of ESP8266 are connected to an external supply of voltage 3.3V and 160mA current.

Do you need to flash ESP8266 with at firmware?

You need to flash the ESP8266 with the AT firmware in-order to use the AT Commands. Download The AT firmware and flash it using esptool.py or NodeMCU flasher. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.

Why does my Arduino not connect to my ESP?

Also, you can’t use the same Tx pins for USB communication AND to connect to the ESP, that basically won’t work. The arduino runs on 5V, but, the ESP on 3.3V you shouldn’t want to mix these up.

How to control ESP8266 with Arduino serial monitor?

Start by uploading blink sketch to your Arduino then connect it to your ESP8266 like this: TX-TX and RX-RX. Now open Serial Monitor and send AT command and see if it responds. If so then you can control it using your Arduino by wiring it back to TX-RX and RX-TX.

Is there a blue LED flashing from ESP?

There is a blue LED flashing from ESP only when I am using 115200, and red LED lights up constantly at any other baudrate. What have I done wrong here? I did 4 hours of research already and don’t know what else I can do now.

Why does my ESP stop responding after random time?

Sometine it work very well and after a random time (1 day, 2 day, 10 minutes, 1 hour…), the esp01 stop working, it not responding to the AT commands sent by the arduino. If I plug directly the esp on an FTDI USB SERIAL converter: same thing, no response from the esp. (The blue led don’t turn ON when I send command, so it’s not normal).

Why is the ESP 8266 not connecting to Arduino?

I am trying to connect the esp 8266 to the arduino and trying to control a bulb using it. But there is a problem flashing the firmware. But there is an error in flashing the firmware . “failed to connect”. Also there is no response in the serial monitor for the AT commands.

Why does the ESP8266 barf out junk?

From the factory they come with the AT firmware installed, so when the ESP8266 power up, they will barf out some junk to the terminal, then they say ‘ready’ and give you a prompt. Do you see this? If you only see junk, then maybe you have the wrong baud rate set on your terminal. try 115200, try 9600.

Do you need firmware to flash esp8266-01?

You need to have flashed the ESP with the AT command firmware. I was able to flash my ESP8266-01 with nodemcu firmware so atleast I know my chip is working. Click to expand… You may have flashed the firmware to use LUA programming.