@world101 The drivers are hard soldered and cannot be replaced without unsoldering.
I though the "Hard Limit" was only available to drivers with current sense which the DRV8825 doesn't have.

@meirmark is there already a real solution? The simple example of Webserver for W5500 as provided by M5Stack gives me the same compilation error using the latest Arduino IDE. Please people from M5Stack : please respond with a working webserver example program. Many thanks.

Hello @Satzende

Did you have a look at the SIM800 SMS example? I know it's not for the SIM7600 nor for the M5Core2, but the AT commands should be the same / similar I guess.

Thanks
Felix

@sinzapatillas
I don't know, I am not an expert in Lora. But you talk about a distance of (300m - 2km max) and the article, without external modification, is 20m if I remember correctly.

Regards
Carles

Hello @paul-k

how far did you get? Is the M5Core2 talking to the LoRa module?

Keep in mind that the LoRa module was designed for M5Stack (Fire, Gray, etc.) and some GPIOs have changed from M5Stack to M5Core2. You can find a comparison here.

I don't have the LoRa module, but from looking at the schematic this should be the GPIO mapping:

LoRa      <-> M5Core2 <-> Name

GPIO18  <-> GPIO18   <-> SCK
GPIO23  <-> GPIO23   <-> MOSI
GPIO19  <-> GPIO38   <-> MISO
GPIO5    <-> GPIO33   <-> CS
GPIO26  <-> GPIO26   <-> RST
GPIO36  <-> GPIO36   <-> DIO0 / INT

Note: on M5Core2 by default GPIO33 is used as external I2C (SCL) on the Groove port A. Luckily external I2C is not enabled by default so that should not interfere. Just keep in mind that you cannot use the LoRa module and external I2C.

Thanks
Felix

Hi, thanks for reply.
@ajb2k3 :
Every thing you wrote is ok ! And I would suggest to do it - in an open-source project.
But here we have an comercial project. I payed for something which they show not correct in the advertisement.
I cannot use it and I get so support !!

I cannot use this system ! I'll go back to Arduino.

BTW: M5Stack cannot be used to control the rover. The rover-system works only correct if I can control all the 6 motor individualy. So -- no change with M5Stack

regards
K.D.

@powersoft said in M5Paper I2C:

Today I rewrote the routines for the BMP280 and BME280 for a single device.
Simple include the source into the main program, and call it.
This is now working as I wont. It takes a afternoon of work!
Now put the finishing touches on the BMP280/BME280.

Would it make sense to post them on the forum when they are ready?

Cheers
Jan

Hi @Powersoft sorry for the absence, ive had some issues to deal with.
nice work finding the issue.
Create a project in the project forum and post your code and solution in there.

You could loop over x and y, calling readPixel to get individual values, and save them.
Or you could dump the raw buffer, which is available using frameBuffer, and is of size getBufferSize.

@felmue That actually worked. Not an ideal situation as I cannot use the newer units, but for now the Lego motors turn again which is awesome!
Thanks a lot! I downgraded the UI, but it never occured to me that I should downgrade the firmware too.

@powersoft
Do you only have 1 canvas? Try canvas instead of canvas1.

BTW, you can enclose your code in three back ticks (```) to make it easier for us to read, like this...

this text has three back ticks before and after it

Hello felmue,
it's no problem - i've ordered one and will have it by the end of the week.
I looked to the scematics too ( - a little, I'm no specialist) and I found what you said.
And I found more things that make me problems.
I think the voltage from the external input is converted to 5V DC like the USB power.
So I cannot use my DC12V motors unfortunately - I have to change to 5V types.

(Now I unterstand, why they are rotating with so less power and slow.)

Thank you and regards
K.D

Hello @Volos

have you tried the official Joystick hat example?

Thanks
Felix

@powersoft

Have you tried this tool yet?

https://github.com/m5stack/M5EPD/tree/main/tools/image2gray

It takes a jpg/png/bmp image and converts the image to a 4bit grayscale array.