Best posts made by SirMichael

@SirMichael

I found what I was looking for, a simple sketch to create a button. I did some minor massages, taking from the events_buttons_gestures_rotation.ino and figured it out.

#include <M5Core2.h>

ButtonColors on_clrs = { RED, WHITE, WHITE };
ButtonColors off_clrs = { BLACK, WHITE, WHITE };
Button myButton(10, 10, 80, 60, false, "Button", off_clrs, on_clrs, TL_DATUM );

void setup() {
  M5.begin();
  M5.Buttons.draw();
}

void loop() {  
  M5.update();
  if (myButton.wasReleased()) Serial.print("* ");
  
}

Sir Michael

@SirMichael

I did some more studying, and came up with the following table:

I hope this is right!
Now, I'm not using the M5Stack bottom board which has the PortB and PortC, so I figure that I can use the RXD2/TXD2 pins as well as the G36 and G26 pins. I'll use those for the other 2 SoftwareSerial ports, and G27 and G19 for the other pins.

The thing that I found confusing was that they do list the pins in the M5Stack documents, but they don't really explain what is available to the user. This took a lot more work than it should have!

Sir Michael

I've been struggling with trying to pass a structure between an Arduino NANO and an M5Stack Core2 through Serial Comms.

I can get the structure to pass correctly between two Arduino UNOs or NANOs, but when I try to get it to use on my project between a NANO and the M5Stack Core2, it fails. (Serial comms passes strings just fine!)

I finally figured out that the sizeof the Structure is reported as 15 bytes on the NANO and 24 bytes on the M5Stack Core2.

I changed my declarations from:
byte to uint8_t
int to uint32_t
on the NANO and M5.

I do also have a double in the structure:

//Use the same struct for comms both ways!
struct AmpStruct {
  uint8_t bMode;
  uint16_t iBand;
  double dVolts;
  uint16_t iAmpTemp;
  uint16_t iFanOutput;
  uint16_t iFwdPower;
  uint16_t iRefPower;
};
//Initialize the values to create the usable structure
AmpStruct AmpData = {0, 0, 0, 0, 0, 0, 0};

Can anyone tell me what the difference is? Is there a way to make the structure the same between the two? There has to be way to declare the variables so they take up the same number of bytes on the two platorms.

I do have the comms working by passing strings, but I'd like to use the Structure within the communications.

Sir Michael

I'm not an expert at this, but perhaps I can help some...

I think you are using an ESP32 for a board.

First of all, did you install the M5Stack boards on your Arduino IDE? Reference this link:
https://docs.m5stack.com/en/arduino/arduino_board

Make sure that you select the board correctly in the IDE:
Tools/Board/M5Stack/M5Core2
Make sure that you have the correct Comm Port. Open your Device Manager, unplug the USB cable from the M5Stack and see which Comm Port goes away. Plug it back in and use that Comm Port Number for the M5Core2.

I'd suggest starting with one of the Examples from the IDE:
File/Examples/M5Core2 (you may have to scroll al LONG way down). Make sure you can load one of the example files to get started. I'd suggest you look under "M5Unified".

Try to do all of your development using

#include <M5Unified.h>

There may be some examples that have

#include <M5Core2.h>

but these are no longer supported. All of the support is going in the the M5Unified branch so they don't have to support so many other products.

I hope this helps.

Sir Michael