ESP8266 Community Forum

- Tue Dec 09, 2014 7:52 am #4356 Hey guys,

I've seen a lot of people having problems with the 5V signals of the Uno. This is why I ordered an due, which works with 3.3V signals.
I know you can solve the problem with a simple voltage divider, and I've got that working with my uno, but my main problem was that I couldn't get the software serial to work, this way I couldn't talk to my ESP through the serial monitor.

The Due has an programming serial port and a native serial port and 4 hardware TX and RX's for communication.
http://arduino.cc/en/uploads/Guide/DueSerialPorts.jpg

By using two different TX and RX-ports, I should be able to use the serial monitor when I am coding the arduino chip, right?

- Tue Dec 09, 2014 7:58 am #4357 yep

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Lets get the party started and +1

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- Tue Dec 09, 2014 12:05 pm #4397 So, which is weird. I've got it working with an uno, but when I connect it the same way:

AT of ESP --> AT0 of Due
TX of EXP --> TX0 of Due

The ESP doesn't seem to transmit, while I read on the forum that the Uno doesn't supply enough current for the ESP to work.
The Due is able to supply 800mA on the 3.3V:



which should mean it should work, anybody experience with the due who knows where the problem may be?

- Sun Dec 14, 2014 7:15 am #4791 I am just now up and running on a Due. I run directly off the 3.3v power on the Due. And only using the USB to power the Due. It seems to be working fine. I have a simple program up and running sending data to ThingSpeak and it seems to be running without power issues.

The setup is as basic as you would image:

Arduino Due -- ESP8266
3.3v -- VCC
3.3v -- CH_PD
GND -- GND
TX3 -- URXD
RX3 -- TRXD

I chose to communicate with the ESP8266 via Serial3 so that I could continue to use Serial(0) as a debugging port (already hard wired to the USB cable).

Jay