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Thank you for uploding the CAD, that helps a lot.
The redesign won't be a problem for me.

Hello,
I adopted the Code a litte for using it with M5Stack Core2 AWS.
It needs only a few changes in the Code, mostly in the Battery level check.

I have changed the HTTP Communication because, when you set a password on the Duet it wont connect properly

  String protocol = "http://";
  String con = "/rr_connect?password=";
  String login_url = protocol + doc["printer_ip"].as<String>() + con + doc["printer_pass"].as<String>();

  Serial.println(login_url);

  String query = "/rr_status?type=3";
  String status_url = protocol + doc["printer_ip"].as<String>() + query;
  
  Serial.println(status_url);

  String dis = "/rr_disconnect";
  String logout_url = protocol + doc["printer_ip"].as<String>() + dis;

  Serial.println(logout_url);

  //Start Connecting to Duet when Wifi is connected
  if (wifi_connected and com == 0) {
    com = 1;
    Serial.println("Wifi Connected");
  }

  // Connect to duet and send a Get status http request.
  http.useHTTP10(true);
  switch (com) { 
    case 1: {
      http.begin(config.printer_pass);
      Serial.print("[HTTP] GET ");
      Serial.println(config.printer_pass);
      com = 2;
    }
    break; 
    
    case 2: {
      http.begin(config.printer_ip);
      Serial.print("[HTTP] GET ");
      Serial.println(config.printer_ip);
    }
    break;
 
    case 3: {
      http.begin(config.printer_diss);
      Serial.print("[HTTP] GET ");
      Serial.println(config.printer_diss);
      M5.shutdown();
    }
    break;
    default : {
      com = 0;    
    }
    break;
  }
  const int httpCode = http.GET();
  Serial.printf("[HTTP] GET... code: %d\n", httpCode);

Also edit the SD Card Variables

 {
"wifi_ssid" : "xxx",
"wifi_password" : "yyy",
"printer_name" : "zzz",
"printer_ip" : "xxx.xxx.xxx.xxx",
"printer_pass" : "yyy",
"printer_diss" : ""
 }

The only thing where i struggle a bit, is to Logoff corectly when Battery level is low or Poweroff is pressed.

@richardmckenna
@zapta
23. Mai 2021, 20:31

Have you interest in the full code for M5stack Core2/CoreAWS, for your Github?