Go Down

Topic: Mega + WiFi R3 ATmega2560 + ESP8266 (8 Mb mémoire) (Read 15286 times) previous topic - next topic


In reply to posters above...

To Awesomo I have the same issue - the ESP creates a WiFi AP when powered up, without the Mega sending any AT commands to it at all. The ESP doesn't respond to any AT commands.

To rcosta I get the same problem - If I try to connect to the serial port on the ESP I get a crash dump at a very strange baud rate.

Kimleng stated that he uploaded a new sketch for AT commands to the ESP chip from the Arduino IDE.

Could you please post the location you downloaded those sketches from?

(Esspressif provide a flashing tool, but it is scary - you have to select lots of different .bin files, and send them to the right address - I'll be much happier using Arduino IDE and a sketch/libraries).


This board is a carrion, pay 10% of a minimum wage in that, only expert to get ... Mine will stay in the bottom of the drawer until I have the courage to throw away ...


Does anyone have any further info on this board?
I'd really like to use it....

The response from RobotDyn isn't very helpful.

The crash dump I get at 74880 baud(!) is:

ets Jan 8 2013,rst cause:2, boot mode:(3,7)

load 0x40100000, len 25700, room 16
tail 4
chksum 0x0b
load 0x3ffe8000, len 848, room 4
tail 12
chksum 0x3f
ho 0 tail 12 room 4
load 0x3ffe8350, len 184, room 12
tail 12
chksum 0xb7
csum 0xb7


i used the @Kimleng instructions to upload this sketch on esp module

#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "936f6136f9f1454981c46cce3382620";

// Your WiFi credentials.
// Set password to "" for open networks.
const char ssid[] = "arduino";
const char pass[] = "";

// This function will be called every time Slider Widget
// in Blynk app writes values to the Virtual Pin V1
 int pinValue = param.asInt(); // assigning incoming value from pin V1 to a variable

 // process received value

void setup()
 // Debug console

 Blynk.begin(auth, ssid, pass);

 // You can also specify server:
 //Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 8442);
 //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8442);

void loop()

and i haven't problem with the upload but when i go to search the wifi network on the phone i don't find it, where i wrong?


Nov 08, 2018, 03:43 pm Last Edit: Nov 08, 2018, 03:45 pm by songjongton
Hello everyone
1.my esp8266 on board can't connect to WiFi. I follow DIP switch table but it's still not connect.
2.what is "MODE" button on the board and how to use
Could you help me please?

thank you


Take a look at the link as posted by isotopa

You can use Google Translate as the blog is in Russian.

The author describes the load of the library and the board settings to program both processors.

Where he refers to "WeMos D1 R2 & mini" to program the esp8266, I used "LOLIN(WEMOS) D1 R2 & mini"
He used Flash Size:4M(3m SPIFFS) as one of the boars settings

You have to press the "MODE" button before you upload the sketch
to the esp8266

I was able to load the sample as described and switch LED13 on and off through the web sample.


Go Up