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Update on this one: Changing to other pins for external I2C makes it work for both Arduino and PlatformIO. So with arduino you can lay external I2C over the internal I2C, but in PlatformIO that does not work. Anybody an idea why not?

it was caused by the CS of the LAN Module13.2. switching the jumper to the alternate position fixed the problem... so far these seem to work (CoreS3 SE+COMMU+Lan Module13.2+DIN Base): int cs_pin = 13; // jumper right int rst_pin = 0; // jumper left int int_pin = 10;// jumper left

@007jimmey Any update or resolution? Im encountering this on ArduinoDroid...

Hello @VashJuan well, it looks to me that none of the listed devices are actually I2C devices. Grove Temp. Sensor: has an analog out pin (the other is NC) which means it directly sends an analog value Grove Wireless Mod: has RX and TX which means it has an UART interface Buzzer: well, my guess would be that it is not I2C either Thanks Felix

@scroggyg The file exists, could the path length be too long? C:\Users\xxxxxxxxxxxxxx\xxxxxxxxxxxxxx\Documents\Arduino\hardware\espressif\esp32\tools\sdk\esp32s3\include\esp_rom\include\esp32\rom

Hello, I've gotten a little closer to the problem. First, I performed a full clean in Visual Studio using platformio AND deactivated the entry for M5Unified. The new M5Unified@0.2.8 continued to load: Processing m5stampplc-test (platform: espressif32; board: esp32-s3-devkitc-1; framework: arduino) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Library Manager: Installing git+https://github.com/m5stack/M5StamPLC git version 2.43.0 Cloning into '/Users/myname/.platformio/.cache/tmp/pkg-installing-pmi7_zhl'... remote: Enumerating objects: 70, done. remote: Counting objects: 100% (70/70), done. remote: Compressing objects: 100% (57/57), done. remote: Total 70 (delta 4), reused 29 (delta 1), pack-reused 0 (from 0) Receiving objects: 100% (70/70), 80.39 KiB | 2.77 MiB/s, done. Resolving deltas: 100% (4/4), done. Library Manager: M5StamPLC@1.0.0+sha.1021da5 has been installed! Library Manager: Resolving dependencies... Library Manager: Installing M5Unified @ * Unpacking [####################################] 100% Library Manager: M5Unified@0.2.8 has been installed! Library Manager: Resolving dependencies... Library Manager: Installing M5GFX @ >=0.2.10 Unpacking [####################################] 100% Library Manager: M5GFX@0.2.10 has been installed! A look at the library.json revealed the challenge in my opinion: dependencies to "M5Unified" - No specific version of M5Unified, always the latest! "name": "M5StamPLC", "description": "Library for M5StamPLC", "keywords": "M5Stack,M5StamPLC", "authors": { "name": "M5Stack" }, "repository": { "type": "git", "url": "https://github.com/M5Stack/M5StamPLC.git" }, "dependencies": { "M5Unified": "*", "M5GFX": "*" }, "version": "1.0.0", "frameworks": "arduino", "platforms": "espressif32" } Before I copy and adapt everything locally, it would certainly be helpful to adapt this. In my opinion, there must be an M5StamPLC version 1.0.1 with the new features, and the old version M5StamPLC 1.0.0 must use M5Unified version 0.2.7. Who (from M5Stack) can help me?

Hello @Powersoft please have a look at my M5Tab5 library (unofficial) here. Thanks Felix

I solved it. My usb c cable was junk.

Hello @felmue, yes, I did, but I didn't see this part: [env:m5stack-stamp-s3] platform = espressif32 board = esp32-s3-devkitc-1 framework = arduino upload_speed = 1500000 build_flags = -DESP32S3 -DCORE_DEBUG_LEVEL=5 -DARDUINO_USB_CDC_ON_BOOT=1 -DARDUINO_USB_MODE=1 lib_deps = M5StamPLC=https://github.com/m5stack/M5StamPLC M5Unified=https://github.com/m5stack/M5Unified Thanks, I will try it.

More information If I use M5Unified.h and then a begin of M5.begin(), the data is all zeros. If I take out the begin, then the data is correct. There must be something in the M5Unified that is restarting the Wire or taking over the I2C bus. How can I correct this. It is a show stopper. If I can find a solution, then I will have to discard the M5Stack basic and go to a regular ESP32.

Hello @felmue, thank you very much for your quick support, it really helped me. It didn't work in my "big" program, but I wrote a small test program, and it fully meets the requirements: #include <M5StamPLC.h> void my_set_backlight(bool o) { PI4IOE5V6408_Class p; p.setDirection(7, true); // false input, true output p.digitalWrite(7, !o); // false on, true off } void printAndWait(String s) { M5StamPLC.Display.println(" " + s); delay(4000); } void setup() { Serial.begin(115200); M5StamPLC.begin(); M5StamPLC.Display.setTextSize(3); } void loop() { M5StamPLC.Display.fillScreen(TFT_BLACK); M5StamPLC.Display.setCursor(0, 10); printAndWait("Test 1"); printAndWait("Test 2"); my_set_backlight(false); printAndWait("Test 3"); my_set_backlight(true); printAndWait("Test 4"); } You can see it not only in the dark screen, but also in the power consumption, which is reduced by about 20%. I suspect that in my "big" program, someone is turning the lights back on (and working against me). Best regards, Uwe

@restart-au said in M5StickC Plus2 crash when Button State call: StickCP2.Display.printf("%d \%", vol); I don't think that backslash-percent means anything special in printf(). You probably want %% instead to get a literal percent sign in the output. I don't know what happens with what you've used, but a crash would not surprise me.

This error usually means the uploaded firmware didn't flash correctly. Try these steps: Use a different USB cable and port. Press the reset button on your M5Stack before uploading. Make sure you have the latest Arduino M5Stack libraries and board definitions. Try erasing the flash completely using esptool (esptool.py erase_flash). Reboot your PC and M5Stack. If it persists, it could be a hardware fault, but most often it’s a flashing or connection issue.

@jbruggem Your first post shows that you haven't configured Arduino to configure code for the M5Stack Core2 which uses a different core and pin config to a base esp32. The example you are using is not an M5Stack demo, Arduino is missing Libraries. All these errors point back to not have the M5Stack Core2 board type selected.