ESP8266 Community Forum

- Tue Dec 09, 2014 6:59 am #4352 Again, I am very appreciative of your replies.

I removed the AVR IC from the Arduino and did an echo test to make sure that I was communicating on the correct COM port which I was.

Did the usual Vcc (and CH_PD) to 3.3V, GND to GND, RX on ESP to TX on Arduino, TX on ESP to RX on Arduino (as per the attached diagram). I continuity tested all connections from the ESP Pins to the Arduino Pins. I tested at both 115200 and 9600 baud rate but to no avail.

I have seen from tutorials on the web that your should get a form of OK message when power is first attached. I don't get any of that. I have tried just sending a simple AT command down the line but the ESP does not respond.

Could it be that my ESP is faulty despite reporting as a WiFi access point and can be connected?

Thanks again,
Harold Clements

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Kind Regards,
Harold Clements

ICQ: 621094716

- Tue Dec 09, 2014 7:10 am #4354 Hi,

I had similar problems at the beginning. In my case it has been a limited power source. Make sure, that your power supply could deliver at least 300 mA for the ESP.
Have success.
Walter

- Tue Dec 09, 2014 7:25 am #4355 Yea, my PSU is variable desktop power supply (30V 5A max). But thank you for the suggestion...

Kind Regards,
Harold Clements

ICQ: 621094716

- Tue Dec 09, 2014 8:44 am #4362 Because the internal pullup resistors can be switched off by sw, in my opinion should connect to external resistors also RST and GPIO0