@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

@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

@kuriko

But the question gets to be, using the pbhub_1.1, can I somehow communicate from the I2C port (PortA) with a Serial Port?

I can't seem to find an I2C to Serial Converter...

Sir Michael

I have an M5Stack Core2 AWS and working on designing a project.

I haven't been able to find a document that really tells me which pins I can and can not use.

I need 3 Comm Ports (probably 2 will use EspSoftwareSerial) and 2 other pins, a Digital Input and a Digital Output. I don't see where RXD1/TXD1 (has a UART) pins are available!

For the Core2 the pins are listed:

From (hours of) studying, the ones that I don't think that I can use are:

1. intSDA/intSCL (I2C Port, I'll have a 4 relay board that I'll have installed that uses I2C).
2. RXD0/TXD0 (used for USB Comms)

Are there other pins that are RESERVED? (besides the obvious: GND, RST, 3.3v, 5v & BAT)

What I THINK I CAN USE:

1. I can use the RXD2/TXD2 for my most important comm port.
2. G27/G19 as my first SoftwareSerial RX/TX Ports.
3. G25/G26 as my second SoftwareSerial RX/TX Ports.
4. G35 & G36 as my Discrete Input and Output pins.
   (I have a MAX3232 Serial Interface chip that I can use with 3.3v power.)

Is this correct?
Are there any other pins that I could use?

Thanks for your help!
Sir Michael

@SirMichael

I finally found the pinout document:
https://docs.m5stack.com/en/core/core2_for_aws

However, I still need to know where to get the compatible cable connectors.

Sir Michael

I have an M5Stack Core2 and want to use SoftwareSerial for communications through a couple of the Ports.

1. Where do I find a document that tells me what GPIO Ports are used for the Ports A, B, and C as well as the pins across the bottom of the M5Stack main?

2. Where do I find the 4 pin connectors that plug into these ports?

Sir Michael

@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