@robski Yes, I have looked at the website (wasn't easy to find on the website). I was looking for a module to expose more of the GPIO pins.

I gave up on using the M5Stack for the project. I can't get access to enough pins.

Thanks though.

Sir Michael

I'm having a lot of trouble finding a list of modules for the M5Stack Core2 AWS that I have, where I can make some connections for a project.

I need to make about 20 external connections for a project consisting of about 4 analog inputs, 11 digital outputs and 6 digital inputs.

Is there a module that I can add to the M5Stack that will give me access to the I/O?
What I/O is available?

I've been searching and can't find the answers that I need.

Sir Michael

@felmue
Yes, I'm aware of the voltage limits. I'm pretty sure that I have some Serial converters that will limit the Rx voltage. I had bought some MAX3232 serial converters on ebay for a previous project that were garbage, but ordered real MAX parts to replace the chips.

I will verify that they are not just TTL level converts.
I appreciate the reminder.
Sir Michael

Felix,

That really helps, and makes sense! That appears to be the bottom that I have on my M5Stack. I should be able to figure it out from there...

Silly question, but what do I use for an I/O connector?

Thanks!
Sir Michael

I'm interested in starting a project using an M5Stack Core2 AWS that I have which would principally be communicating through the Serial Port (GPIO1 & GPIO3) with a Ham Radio device.

I'm not real familiar with the hardware on the M5Stack, but I need to interface with the serial port for communication.

I don't understand how I physically connect to the M5Stack GPIO pins 1 and 3. When I remove the 4 Allen screws, I have access to the GPIO pins, but how to I get access to them when I have the lower part connected to the display? Is there a way to get the connections through one of the outside I/O connectors?

I've looked at the docs (https://docs.m5stack.com/en/core/core2) but it isn't clear to me how to do the hardware interface.

I'm fairly familiar with Arduino programming, so I'll go with that for now.

Sir Michael, W0IH

I'm trying to figure out how to used the M5Stack, Core2 and using the Examples. I'm trying to write some code to generate some on-screen buttons and found the "events_buttons_gestures_rotation" sample script.

OK, it works, but it doesn't explain some of the details that I need. For example there is a code line:

Button tl(0, 0, 0, 0, false ,"top-left", off_clrs, on_clrs, TL_DATUM);

I'm assuming that the "0,0,0,0" is the coordinates (but what order???). But what is the binary "false" arg, etc...
But I can't find any document that explains what all of the function arguments are.
This is not only for this function, but all of the other functions in the library.

I went to the https://github.com/m5stack/M5Core2 which is the download for the library and found the Keywords.txt which lists all of the functions, but none of the definitions.

Where can I find the definitions for the various function arguments?

Sir Michael

@teastain,

I haven’t gotten very far in learning the UIflow enough to learn if it supports the “tabs” like the Arduino ide. I have some libraries that I often include in my sketches (i.e.: Morse code for error messaging) and it’s easier to put all of the buttons in one file, display in another, subroutines, etc….
Does UIflow support anything like that? Files?

I’ll be honest, I don’t understand enough about the ESP32 to understand about your references to Expressif. I have used an ESP32 for the Bluetooth as a solution to a problem that I had, but I am not using it at near its capacities.

And to ajb2k3, I am in fact using the M5burner with the Core2 (as mentioned above). It’s working, but just slow…. As a matter of fact, even the Arduino compiler is slow.
I think that I may have some other interaction issues with some other install somewhere.

Sir Michael

I gave up... There were no answers and I couldn't get UIFlow to work.
Went back to Arduino IDE.

Sir Michael

I have a Core2-AWS and trying to learn how to use it. I've done a lot of programming with Arduinos in the past...

I had a program loaded into the M5Stack, and then went back to the M5Burner and loaded the UIFlow for the Core2 (top of the list).

My M5Stack comes up as Com9 and I can load in my original "Hello World" that I wrote some months ago. However, I can't see to do any mods to the program and get them to load (adding a box/label/sound, etc.). The UIFlow just says that it's disconnected.
I'm trying to figure out how I would go about writing and debugging a program, adding code, etc... Keeps saying that it's "Disconnected".

I tried via USB (local UIFlow exe) and TCPIP (Browser editor), but it always says that the device is disconnected. Tried "Reset" and restarting...

What am I doing wrong?

Sir Michael

I can't seem to figure out how to use the online UIFlow editor and to save to a different folder. It defaults to the "Downloads" folder.

I can open a file in another directory, but I can't seem to change the default folder. I want to use "Documents/M5Stack" and locate my folders there.

I've searched the "Settings" and everyplace else that I could think of.
I've tried to google for a solution, but it always takes me on a wild goose chase.

Sir Michael