Serial Communication Between WX-ESP8266 Module and Arduino Nano

nwiggins · 2020-02-17 01:42

Hey all,

I'm currently working on a project that involves the use of a WX ESP8266 with an Arduino Nano. Currently I'm unable to read the data being sent by the Wifi module to the Arduino. Both the Arduino and the WX ESP8266 have a baud rate of 115200. The data we are getting is garbage. Are there any tutorials for using the WX-ESP8266 Wifi module with Arduino Nano? (AVR specifically, not PropC).

Thanks in advance!

iseries · 2020-02-17 13:07

Here is some sample code that works on my Bufferfly board. It has 3 serial devices which it seems the Nano does not. So I assume you are using soft serial to communicate with the WX WiFi module.

On the web page for the WX WiFi make sure under settings that "Serial Commands (aka CMD):" is enabled and saved to flash.

Then the following Arduino code should work except since you only have one serial device you will have to use soft serial for Serial1.

#include <Arduino.h>
#include <Wire.h>


// WiFi Commands

#define JOIN    0xEF
#define CONNECT 0xE4
#define CLOSE   0xE8
#define LISTEN  0xE7
#define REPLY   0xE5
#define POLL    0xEC
#define RECV    0xE9
#define SEND    0xEA
#define CHECK   0xEE
#define SET     0xED
#define CMD     0xFE

char Buffer[1024];
int Pos;
char Status;

void WXCheck(char *Environment)
{
  Serial1.write(CMD);
  Serial1.write(CHECK);
  Serial1.print(Environment);
  Serial1.write('\r');

  delay(1000);
  Pos = 0;
  while (Serial1.available() > 0)
  {
    Buffer[Pos++] = Serial1.read();
    Buffer[Pos] = 0;
  }

  Status = ' ';
  if (Buffer[0] == CMD)
  {
    Status = Buffer[2];
  }
}

void setup() {
  delay(5000);
  
  Serial.begin(115200);
  Serial1.begin(115200);

  Serial.println("Starting");
  
  WXCheck("version");

  Serial.print("Status: ");
  Serial.println(Status);
  Serial.print("Version: ");
  Serial.println(&Buffer[4]);
}

void loop() {
  // put your main code here, to run repeatedly:

}

This should return the version number of your WX WiFi board as seen on the home page.

Mike

nwiggins · 2020-02-20 00:10

iseries wrote: »
Here is some sample code that works on my Bufferfly board. It has 3 serial devices which it seems the Nano does not. So I assume you are using soft serial to communicate with the WX WiFi module.

On the web page for the WX WiFi make sure under settings that "Serial Commands (aka CMD):" is enabled and saved to flash.

Then the following Arduino code should work except since you only have one serial device you will have to use soft serial for Serial1.
#include <Arduino.h>
#include <Wire.h>


// WiFi Commands

#define JOIN    0xEF
#define CONNECT 0xE4
#define CLOSE   0xE8
#define LISTEN  0xE7
#define REPLY   0xE5
#define POLL    0xEC
#define RECV    0xE9
#define SEND    0xEA
#define CHECK   0xEE
#define SET     0xED
#define CMD     0xFE

char Buffer[1024];
int Pos;
char Status;

void WXCheck(char *Environment)
{
  Serial1.write(CMD);
  Serial1.write(CHECK);
  Serial1.print(Environment);
  Serial1.write('\r');

  delay(1000);
  Pos = 0;
  while (Serial1.available() > 0)
  {
    Buffer[Pos++] = Serial1.read();
    Buffer[Pos] = 0;
  }

  Status = ' ';
  if (Buffer[0] == CMD)
  {
    Status = Buffer[2];
  }
}

void setup() {
  delay(5000);
  
  Serial.begin(115200);
  Serial1.begin(115200);

  Serial.println("Starting");
  
  WXCheck("version");

  Serial.print("Status: ");
  Serial.println(Status);
  Serial.print("Version: ");
  Serial.println(&Buffer[4]);
}

void loop() {
  // put your main code here, to run repeatedly:

}
This should return the version number of your WX WiFi board as seen on the home page.

Mike

Hi Mike,

Thanks a lot, this worked like a charm.

Serial Communication Between WX-ESP8266 Module and Arduino Nano

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