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For the past 2 days i have been trying to upload sketches to my esp module by using as a middleman this arduino uno clone .My goal is to program the esp to work alone as a microcontroller using the Blynk app,so installing the nodemcu flashing method is not an option. The connections i used are the following: ESP-->Arduino Uno

  1. ch_pd - 3.3v
  2. vcc - 3.3v
  3. GND - GND
  4. rx - rx
  5. tx - tx

No matter what i do i don't even get a response using AT commands on the serial monitor either by choosing The uno board or the esp8266 generic at 115200 baud or 9600 at both nl & cr.

I have also tried bypassing the arduino mcu by shorting the RES pin with GND since the chip is non-removable with no avail.(read somewhere that this method can be used for the original arduino uno instead of removing the chip,seems that doesn't work for the clone version).

Another method i used was to power the esp externally via a 5v battery leading to a 3.3v regulator thinking power might be the issue,nothing yet again.The connection i used was:

  • ch_pd (esp) - 3.3v (regulator)
  • vcc (esp)- 3.3v (regulator)
  • gnd (esp)- gnd (regulator)
  • rx (esp) - rx(arduino)
  • tx (esp) - tx(arduino)

What am i doing wrong ?

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Connecting TX(ESP) to TX(ARDINO) lets 2 outputs fight against another... please rethink this. – yeti May 22 at 13:02

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