@felmue Thank you for suggestion Felix.　And Sorry for my late reply. I tried Serial2.println("AT$SF=" + msg );. or Serial2.println("AT$SF= + msg ");. and Serial2.write("AT$SF= + msg ");. or Serial2.write("AT$SF=" + msg );. But I couldn't communicate. If you have new tips, I would love to try. Thank you.

Hi guys I've found that the SD card only seems to be read when it already is inserted when M5Paper is booted / reseted. Or in other words, if M5Paper already is running when I insert the SD card it is not read and going to the Factory Test Test screen returns an SD card failed. On the other hand when the SD card has been recognised and I remove it and then go to the Factory Test Test screen the SD card still passes the test. Which leads me to my question. In the M5Paper schematic the SD card detect line is connected to GPIO34 and I already verified that reading GPIO34 actually reflects whether an SD card has been inserted or not. Has anyone already tried to use this information? Thanks Felix

Your flow works for me using https://httpbin.org/get as a test server for HTTP GET. Also it works for HTTP POST, but I added a key/value pair to pass along with the POST Data, like this... If you would like further help troubleshooting, you'll need to provide more detail... What M5 hardware and software version (uiFlow and device firmware) are you using? What the 192.168.1.123 device is (you mentioned IOT device, but what is it?) and also what the ?offx query string is for (i.e. what does it do or what do you expect from it?)

This is specifically for the Core2 for AWS IoT EduKit hardware. The regular Core2 and/or the standard M5Go bottom will not work with this firmware.

Hello @braddo there are Functions in UIFlow. Thanks Felix

Hello @Piet could you share your UIFlow code? I can read hour, min, sec, day, month and year just fine, no error. Thanks Felix

Hello @veryalien nice work-a-round. Hopefully it will be fixed soon though. Thanks Felix

Hello @m5stack thank you for the clarification. I appreciate it. Thanks Felix

Sorry, full documentation is way behind schedule.

Sorry, I have been busy but Moderation can take normally up to 12 hours to 24 hours and most people join or post when I'm asleep.

Just a follow up. I contacted M5Stack tech support and they told me the old modules have pins that are 2.5mm and the new board has pins that are 3mm. So in theory I have the newer board but it separates from the Core2 fairly easily. Meaning the pins are probably making contact but not great. Will have to get longer screws and screw the module down to ensure good contact. For reference to separate from the Grey Core it is very tight and I usually use a screwdriver. I measured and the Grey Core lets the pins seat approximately 1mm more than the Core2. Here is a picture showing how to measure pin length.

Thanks for your support @felmue, today I received my new M5Stack CORE2 and the SD card was immediately, so the card is not the problem, the problem is the fire M5Stack FIRE that has a problem. I have verified the great quality that CORE2 has, the truth is that it is very very good. I'm going to do more tests to see how it works.

It seems that it was a short-lived joy. Revert to a black screen, distorted screen, or an upside-down screen. I tried v1.7.1.1, v1.7.1, v1.7.0, v1.6.6 and they are all the same and have a black screen. It's HW problem? Also, even in this situation with UIFlow is running, if I burn factory test firmware, it will work normally.

Sadly, the ESP32-S3 drops USB host mode, so the use case presented by the OP won't work on the new part. An M5Stack w/ the ESP32-S2 would open up a bunch of interesting use cases due to that feature.

Can you advise how I can get the required Token as I have been trying for 2 days and still getting a failed error? Thanks Ian