ESP8266 Community Forum

- Sun Jun 28, 2015 10:28 pm #21935 Hi,

thanks for the answer. Sorry, but im new in this. What mean loopback?
Or if this method for arduino serial communication wrong, can you show me good example?

Thank you.

- Mon Jun 29, 2015 12:27 am #21941 Serial communication is a point to point communication.
You are using one interface with two partners: ESP8266 and the Serial-Monitor.
It would be better to use two serial interfaces.
Arduino (beside MEGA) have only one hardware-serial-Interface. This should stay for uploading and monitoring
I would connect the ESP to a "softserial-Interface". This are two different pins of the arduino.
Look at here:
https://www.arduino.cc/en/Tutorial/SoftwareSerialExample
This is a good explanation, and a basic example for this.
For the first step, you can use this 1:1. If you use the same pins of the arduino.
But be aware, you should use a lower baudrate than 115200 baud with this interface.
I normally take 19200. This is quick enough for this.

my ESP8266: ESP-01 V2 / ESP-12E (NodeMCU)
ESP8266 Arduino add-on
Arduino IDE 1.6.5

- Mon Jun 29, 2015 3:05 am #21948 Hi, thank you, unfortunately got the same result with softwareserial too
Used 9600 baud at ESP and Arduino side too.

Any working Serial example for ESP and Arduino?

- Mon Jun 29, 2015 6:26 am #21961

Hi, thank you, unfortunately got the same result with softwareserial too
Used 9600 baud at ESP and Arduino side too.

My ideas are gone....

Did you take the basic example, or your code (modified for software-serial)?
For the first step, the example should be enough. It is only carrying through the signals from one serial port to the other.

You told us, that with only ESP (serial port connected to the USB-TTL-Converter at the PC) you got a proper result. Right?

my ESP8266: ESP-01 V2 / ESP-12E (NodeMCU)
ESP8266 Arduino add-on
Arduino IDE 1.6.5