thank you for letting the community know.

I've checked the touch firmware version (w/o actually updating it) of two of my M5Core2s and both report fw v0.0.0.

Do you remember if the touch firmware update actually ran through successfully? I wonder if maybe the firmware isn't broken, but the update process failed.

Thanks
Felix

I feel like it may be a screen calibration issue. There is this note from this page (https://shop.m5stack.com/products/m5stack-core2-esp32-iot-development-kit-for-aws-iot-edukit):

"Some of the screen edges will have touch non-linearity problem, you can try to use M5Tool to upgrade the screen firmware to solve this problem."

And looking at the source code for the referenced M5Tool, it appears it performs a procedure to update the touch firmware to version 17. This may actually be a downgrade for the AWS unit, maybe not, but in any case I'm pretty sure this broke it.

-- void ft6336_fw_updater(void); // M5Core2 TouchPanel updater

I logged an issue with the M5Tool github project. Looking at the history this is not the first time this firmware update broke one of the models.

sorry, I cannot help you with that. I am not very well versed about how to use classes.

Thanks
Felix

private:
    void tapEvent(Event& e);

Then in M5GUI.cpp:

void M5GUI::begin(){
  M5.Buttons.addHandler(tapEvent, E_RELEASE);
}

void M5GUI::tapEvent(Event& e){
  Serial.print("Button: ");
  Serial.println(e.objName());
}

The M5.Buttons.addHandler(tapEvent, E_RELEASE); is giving me this error:

argument of type "void (M5GUI::)(Event &e)" is incompatible with parameter of type "void ()(Event &)"

How do I integrate that event handler function properly into class method?

ok, I hope you have better luck with the non-AWS version.

Thanks
Felix

Stubborn ( or dumb) here, I'll return these 2 and buy the non-AWS version.
Bo

have you downloaded the Core2_For_AWS from within M5Burner?

In my Linux setup Core2_For_AWS-v0.0.1.bin is in this path M5Burner_Linux/packages/fw/core/.

Thanks
Felix

I looked everywhere on the web and only found the source. Can you send it to me?

On + side, I got Thonny, blink, & hello going on a new ESP-WROOM-32 ESP32S!

I'm hoping the.bin file is the solution.
Bo

the documentation here should answer most of your questions. If you define your buttons outside a function then you can use btn1.wasPressed() like this:

    #include <M5Core2.h>
    Button myButton(10, 10, 200, 100, false, "I'm a button !", {BLACK, WHITE, WHITE});
    void setup() {
      M5.begin();
    }
    void loop() {
      M5.update();
      if (myButton.wasPressed()) Serial.print("* ");
    }

As for I2C - as I wrote in my last post, check out tasks.

Thanks
Felix

Yes, I also realized Wire.requestFrom(); is causing the block. Is there any way to get around this issue? This make the device's UI not very user friendly when i2c is used and without i2c, this device is not very useful as a lot of modules depend on i2c :(

if I print millis() before and after the Wire.requestFrom() statement I see that the statement is blocking for about 1 second. During that time no other code is running, including checking for touch. You might want to look into tasks.

As for the button, you'll need to add the keyword static in front of Button btn1 .... Reason: with your current code the button gets drawn but since the variable btn1 is only valid as long as ShowScreen() is executed, it no longer exists when you tap the screen.

Thanks
Felix

String wireData;
unsigned long prevReadMillis;
int READ_DELAY = 100;    

void setup() {
  M5.begin();
  Serial.begin(115200);
  Wire.begin(32, 33);

  //Init GUI
  myGUI.begin();

  myGUI.ShowScreen();
}

void loop() {
  myGUI.loop();
  I2CLoop();
}

void I2CLoop(){
  if((millis() - prevReadMillis) > READ_DELAY){
    //Read 20 bytes from the slave
    length = Wire.requestFrom(I2C_ADDR, I2C_LENGTH);

    if(length == I2C_LENGTH){
    //in test environment, codes inside this if statement are never executed because I have not connected any external I2C device but the touch is already not responsive.

      wireData = "";

      wireData = Wire.readStringUntil('!');
      Wire.flush();

      Serial.print(millis());
      Serial.print(" - ");
      Serial.print("Wire Data: ");
      Serial.println(wireData);

    }else{
      wireData = "";
    }

    prevReadMillis = millis();
  }
}

GUI class codes:

void M5GUI::begin(){
  //Setup touch buttons
  M5.Buttons.addHandler(tapEvent, E_RELEASE);
}

void tapEvent(Event& e){
  Serial.print("Button: ");
  Serial.println(e.objName());
}

void M5GUI::loop(){
  M5.update();
}

void M5GUI::ShowScreen{
  //Create Touch Button
  ButtonColors on_clrs = {RED, WHITE, WHITE};
  ButtonColors off_clrs = {BLACK, WHITE, WHITE};

  Button btn1(BTN1_POS_X, BTN1_POS_Y, BTN_WIDTH, BTN_HEIGHT, false ,"btn1", off_clrs, on_clrs, CC_DATUM);
}

Another issue is, whenever I touch the screen, the source is always "background" even though I clicked on the "btn1" coordinate. How do I make the virtual touch button to work? The only working sources are: background, physical btnA, physical btnB, and physical btnC. I can't get any virtual button to work. I plan to put several virtual button and execute different code when each button is tapped, so I need to be able to identify the correct source of event.

Core2_For_AWS is a firmware binary in M5Burner as well. No need to compile anything. (Note: it's listed under CORE and not CORE2 & TOUGH.)

As for the AT608A error. Since the AT08A is in the M5GO battery bottom 2 - did you try this with the M5GO battery bottom stacked?

The only other idea I have, if you haven't tried that yet, is to use M5Burner to completely erase your M5Core2 before burning a new firmware.

Thanks
Felix

I know it's a software error but am out of places to look.

Is there a way of transferring an image from a working cube?
What I've done twice can be done again, I'm afraid. Should I buy the third one?🤔😂
Thanks so much for your help.
Bo

it's difficult to say why that is happening w/o seeing the actual code you are using. Care to share your code?

Thanks
Felix

ok. so we know that the touch IC is alive - that is good.

Using M5Burner have you tried to load and run Core2_Tools or Core2FactoryTest or Core2_For_AWS firmware? Does touch work with any of these three firmwares?

Thanks
Felix

Should I return both and buy another, if Amazon let's me?
Thanks again.
Bo

M5Core2 has two I2C busses. An internal one (GPIO 21, 22) and an external one (GPIO 32,33) e.g. port A.

The I2C scan code you've posted only scans the external I2C bus (port A). So if nothing is connected to port A the scan will find noting.

In order to scan the internal I2C bus you'll need to modify these two lines:

    Wire.beginTransmission(address);
    error = Wire.endTransmission();

to

    Wire1.beginTransmission(address); // change Wire to Wire1
    error = Wire1.endTransmission(); // change Wire to Wire1

Without the M5GO Battery bottom2 stacked I get 34, 38 and 51. The touch IC has address 38.

Please try the I2C scan with the above modifications on your M5Core2 and let me know the scan result.

Note: In the M5Core2 library Wire is used for the external I2C bus and Wire1 is used for the internal I2C bus.

Thanks
Felix

It this a portion that I may have corrupted that needs to be reflashed?? I'm assuming it is not affected by the ERASE option.

I took it apart but could not run it since the battery is there.

It has to be a software bug in one of the programs I ran, for it to happen in TWO. It did work initially. I killed the second almost immediately.

I left a note on the AWS M5 forum and sent one to M5stack support.

Should I send them both back? I really want to give micropython/blocky a chance to help me learn Python.

I wonder if I can find this available on another device.?? Any ideas greatly appreciated.
Bo W4GHV

Part of the sketch.

• describe：I2C Scanner. I2C探测
• date：2021/7/26

/
/
This program scans the addresses 1-127 continuosly and shows the devices found on the TFT.
*/
#include <M5Core2.h>

void setup()
{
M5.begin(true,true,true,true); //Init M5Core2(Initialization of external I2C is also included). 初始化M5Core2(初始化外部I2C也包含在内)
//Wire.begin(21, 22); //Detect internal I2C, if this sentence is not added, it will detect external I2C. 检测内部I2C,若不加此句为检测外部I2C
M5.Lcd.setTextColor(YELLOW); //Set the font color to yellow. 设置字体颜色为黄色
M5.Lcd.setTextSize(2); //Set the font size to 2. 设置字体大小为2
M5.Lcd.println("M5Core2 I2C Tester"); //Print a string on the screen. 在屏幕上打印字符串
delay(3000);
M5.Lcd.fillScreen( BLACK ); //Make the screen full of black (equivalent to clear() to clear the screen). 使屏幕充满黑色(等效clear()清屏)
}

int textColor=YELLOW;

void loop()
{
int address;
int error;
M5.Lcd.setCursor(0, 0);
M5.Lcd.println("scanning Address [HEX]");
for(address = 1; address < 127; address++ )
{
Wire.beginTransmission(address); //Data transmission to the specified device address starts. 开始向指定的设备地址进行传输数据
error = Wire.endTransmission(); /*Stop data transmission with the slave. 停止与从机的数据传输
0: success. 成功
1: The amount of data exceeds the transmission buffer capacity limit. 数据量超过传送缓存容纳限制
return value: 2: Received NACK when sending address. 传送地址时收到 NACK
3: Received NACK when transmitting data. 传送数据时收到 NACK
4: Other errors. 其它错误 */
if(error==0)
{
M5.Lcd.print(address,HEX);
M5.Lcd.print(" ");
}
else M5.Lcd.print(".");

delay(10);

}

if(textColor==YELLOW) {
textColor=CYAN;
}else textColor=YELLOW;
M5.Lcd.setTextColor(textColor,BLACK); //Set the foreground color of the text to textColor and the background color to BLACK. 设置文字的前景色为textColor背景色为BLACK