Cactus Micro Rev2 ESP Serial Communication

Arduino
1

Hello. I’m trying to communicate with ESP via Mega32U4. I successfully upload .bin file with NodeMCU flasher but it doesn’t give any respond. I can’t even communicate simple serial. ESP side sketch file:

#include <ESP8266WiFi.h>

const char* ssid = “ADIisim”;
const char* password = “biseylerbiseyler123”;

void setup()
{
Serial1.begin(115200);
}

void loop()
{
Serial1.println(“Hello”);
delay(1000);
}

Settings (I’m not sure this settings, maybe wrong is here):

2
2491×637 11.2 KB

I extracting .bin file with Arduino IDE and send to flasher with this settings:
Baudrate: 115200
Flash size: 512kB
Flash speed: 40Mhz
SPI Mode: DIO

Mega32U4 side sketch file:

while(Serial1.available()) {
String character = Serial1.readString();
Serial.println(character);

}

Serial port didn’t give any value. And I don’t know ESP firmware version. I tried firmware update (espduino/esp8266/release at master · AprilBrother/espduino · GitHub) via esptool but it gave connection error. And I can’t erase flash it still gives an error. This time I tried via nodeMcu flasher:

Screenshot:
https://bbs.aprbrother.com/uploads/default/original/1X/7791f29736c716eae76605727e2905fd5ba9c882.png

It succeeds, but I still get no response.

2

@aprilpea @aprilpeas Do you know the solution?

3

Did you use Arduino Mega 32u4? Is it Cactus Micro Rev2?

4

Yes it is Cactus Micro Rev2.

5

You may need erase flash for the ESP8266 module. nodemcu-flasher can’t do the job. I recommend you try the esptool-ck we modifed instead

Here’s an example for upload esp-programmer to 32u4 with platformio

How to Erase flash for ESP8266

example

esptool -cp /dev/ttyUSB0 -cd nodemcu -ce
6

Problem had solved in the arduino.stackexchange:

7

Thanks for update