Hi,

and thanks for the quick reply and help.

I checked without any device connected and got the same behavior.

To try with the UIFlow firmware like suggested, can you please describe how on an Atom device I can make the firmware to execute the boot.py and main.py out of the flash, so I can use my tooling how described?

It not worked until now. I can connect to the repl, but there is something running, even when I am in the (blue) usb programming mode.
From where the UIFlow firmware executes? Can I put my stuff there with ampy?

Thanks for the help again!

Hi,

I started some weeks ago playing around with M5Stack components. I love the Atom. It is chosen as the main "work horse" of my projects.

Want to not use the cloud for programming and I also could not bring M5Burner or UIFlow to work locally.
So I flashed MicroPython via esptool and use ampy for bringing my scripts to the ATOM.

I worked out successfully a project with the i2c connected Thermal camera unit.

Now on my second project I want to connect 3 to 4 Watering Units to the ATOM. With only one connected to the ATOM it works all ok.

But now to my problem (sorry for the long intro...).
When I now connect the PbHUB 1.1 to the Atom, it is visible in a i2c.scan() with the right ID, but only until I try to access one of its registers. Whenever I do that, I get an exception from type OSError.ETIMEDOUT. After that also a scan will not find the device again until it is freshly connected.

I tested with 2 PbHUB devices and the second was never connected to a watering unit or any other device. So I am quite sure it is not an hardware failure issue.

I read in the docs that the PbHUB V1.1 is based on STM32 and the Input/output PINS are only 3,3V. But I don't think that this holds true also for the grove connector, right?

Do somebody know what the root cause of my problem is?

Thanks for the help in advance!