ESP8266 Community Forum

- Mon Jul 13, 2015 3:19 pm #23178 I think I'm missing something. My guess is that you have a sketch program which is sending the text "Goodnight Moon" through the serial. If this is the case and you have deployed that application to your ESP8266, then you have replaced the AT command handler program that was previously there with your "Goodnight moon" application ...

The AT command processor is an example application that comes pre-installed on new ESP8266s. When you install a new program, you replace the existing program with the new one.

Free ESP8266 book available for download here.

- Mon Jul 13, 2015 4:09 pm #23182 I remember getting the same messy output the first time I powered up the module and I've never tried uploading any code to print "Goodnight Moon!". So yes, it's a factory fresh module, the only question is WHICH factory.
Here's the module I ordered: http://www.ebay.com/itm/291352639350

So does this mean that at least the TX pin is working and is connected to the correct Arduino pin?

- Mon Jul 13, 2015 4:26 pm #23183 I think a reset on the story is what is needed. Have a look at this sample page:

http://www.electronicsupgrade.com/the-esp-12esp8266-arduino-wi-fi-shield/

I am guessing that YOU installed THAT program/sketch on the Arduino and the Arduino is running that program. And THAT is where the "Goodnight Moon" text is coming from ... from the setup code inside the Arduino. That puts a whole new twist on the story ... now we have a PC connected USB to an Arduino that is running a sketch that is receiving serial data that is transmitting it to a second serial that is connected to an ESP8266.

And if that is the case ... and your goal is simply to load a custom app into the ESP8266 ... then I'm going to claim that this is much more complicated than it need be. It would also explain why serial input just "disappears". It is being consumed by the Arduino sketch but not written to ESP8266.

Free ESP8266 book available for download here.

- Mon Jul 13, 2015 6:12 pm #23187

I think a reset on the story is what is needed. Have a look at this sample page:

http://www.electronicsupgrade.com/the-esp-12esp8266-arduino-wi-fi-shield/

I am guessing that YOU installed THAT program/sketch on the Arduino and the Arduino is running that program. And THAT is where the "Goodnight Moon" text is coming from ... from the setup code inside the Arduino. That puts a whole new twist on the story ... now we have a PC connected USB to an Arduino that is running a sketch that is receiving serial data that is transmitting it to a second serial that is connected to an ESP8266.

And if that is the case ... and your goal is simply to load a custom app into the ESP8266 ... then I'm going to claim that this is much more complicated than it need be. It would also explain why serial input just "disappears". It is being consumed by the Arduino sketch but not written to ESP8266.

I don't work with Arduino, but this sounds to me like the right answer. Nice catch.