@ameero95 said in M5StickC Plus cant drive an Adafruit sensor module (3.3V) through the Grove port using the Grove to STEMMA QT adapter.:

STEMMA QT

try level shifter maybe?

how long it takes to connect if you burn firmware and set it up with network start for online UIflow? on my devices it usually connects in seconds

@ajb2k3 tday I've loaded one of old firmwares with old M5burner and it is same...only LCD backlight is on all the time not a single thing being displayed on LCD, if I use ERASE option then backlight is off

@ajb2k3 said in Forwarded Adafruit support for M5Stack Faces:

Just curious, did you update the firmware between when it was working and when it stopped working? M5Stack do sell replacement screens for $30 ish as I had to check after braking the ribbon cable trying to replace the glass screen cover I accidentally broke putting in a screw that was too long.
Are you sure it’s soldered correctly?
Did you try running code that accidentally accessed the pins used by the screen?

think you could get core2 for very close to this screen replacement price tag,

I have M5Stack Core Basic which after months and months of working fine suddenly is now only showing LCD backlight on after power is on. I can see its COM port fine, I can see COM port messages being printed fine, I can connect to it and load project via COM port or remotely via UIflow (wifi works) but......screen is blank with backlihgt LEDs on all the time...
You mentioned that you opened it, dismantled and soldered connections which would void warranty I think. Did you tried to ERASE it using M5Burner then load factory test easyloader in to it?

@ajb2k3 said in M5Core - blank screen:

Can you install the latest firmware version make you are using Core for the Core1 gen and Core2 for the Core2/touch gen as they have different screens and are connected differently

I'am loading Core firmware as below:

Did some tests tday with loading M5Core basic factory test project and checking what is coming out via COM port after restart...
and looks like "internals" are working, at the end of test when pressing each button it prints A B C on COM port monitor so it reacts to buttons press too but still only LCD backlight is up nothing else on LCD, i can connect to Core via usb or uiflow remotely still.

@hiranobu said in (Core2 AWS) LCD does not light up:

Hello, I am a Beginner.
The LCD on my Core2AWS has stopped lighting up.
The power seems to be on, writing is normal, and when I restore the firmware to its initial state with M5Burner, the LCD lights up again, so it does not seem to be a hardware failure.

After writing the sketch using ArduinoIDE, the LCD will not light up.
I would appreciate any good advice you can give me.
I posted this using an automatic translation service. Sorry if it was funny English.

does it work if you use UIflow?

Hi, what kind of tests can I do to find issue with my M5Core? It was working ok for months. Suddenly it stopped to display on the screen. I can see its COM port, I can burn firmware in to it, I can send project to it but....nothing is displayed at all. Only thing visible when its on is backlight, I can also hear boot/on sound.

Does UIFLOW supports Modbus TCP - i'm trying to read Modbus device (meter) on my network by using M5GO on wifi?