@Balboa yes and it can be used to send data it can not be used as a WiFi modem. You can use it to receive data and commands from sensors to send to the internet just not browse internet

@themaker did you erase the firmware before writing?

@Revilo_oli With some testing it was found that the core 2 was faulty and it had to be replaced

You can’t directly but if you use thonny, you can retrieve the Micropython code from the controller as its save on the controller as pure text

Looking at the schematics, the RST pin if pulled low, will do the same thing as if S1 is pressed. I assume S1 is the reset button. [image: 1714661819436-c0ff6da9-61b2-4c66-b20b-bf6cbb1b267e-image.png] [image: 1714661833578-64f32551-a132-4a03-8cf5-b66d60089d5b-image.png] I don't have a CORE2, but from experience with some other M5Stack products the function of the reset button depends on whether the device is on external power (e.g. USB) or on battery power. External power: restarts , battery power: shuts down. (but that is something you can test yourself)

Ok, I found the issue and it's a stupid mistake on my part. I had forgot that M5 Stack is the company, not the device name and had downloaded the M5Stack examples, which aren't aimed at this particular device. When I started using the M5 Core2 library, it looks like it is actually working, so that's good news. Sorry for the confusion!

Use M5Burner to erase the firmware and burn UIFLOW2 for Core2/Core2AWS. once the process is complete and the button turn green, close M5Burner and press the reset button.

Thank you so much for the quick response. Indeed, the pins for the I2C communication are not matching. Given that the only marking on the module is '5V' and I2C, is it possible to reroute the wiring of the I2C from the back of the driver module? Also, I noticed a Core2 mark on the driver—does this have implications of how the Core 2 should be connected? Thanks again for all the support [image: 1713368288496-65ec1899-dcd0-4ba7-abce-7155ee95ef83-image-resized.png]

Wait and try again. It could have been a server update or the Great Firewall of China.

What os do you have and have you installed the USB drivers?

@ajb2k3 seller's page on GitHub says ESP32 series works wrong. https://github.com/DFRobot/DFRobot_PH I can confirm it because analogRead() returns some unreal value of voltage: 8461.9

If you carefully look under the 3D antenna, you can see there are pre-soldered areas that look like for receiving an U.FL connector. Quite challenging to access to though. Maybe desolder the 3D antenna first. [image: 1712063033613-m5core2antenna-resized.jpeg] [image: 1712062993748-screenshot-2024-04-02-at-15.01.58-resized.png]

@teastain Thanks, that worked like a charm!

You haven't installed the ESP-IDF tools and Xcode tools needed for OSX