Topics tagged with arduino

Tab5 Display Power Save

Thu, 27 Nov 2025 19:58:19 GMT

I2c failure with MPU6050 component

Grandpa-G — Sun, 03 Aug 2025 15:10:40 GMT

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.

PPS 13.2 Arduino Can not compile the example Sketch

plackettsj1 — Sat, 11 Jan 2025 14:25:20 GMT

@felmue Thank-you - I had completely misunderstood :-) Simon

Arduino Export binary names changed (m5stick_c_plus to m5stack_stickc_plus) why?

Thu, 22 Aug 2024 22:47:26 GMT

PCB LED stick

Matej's Workshop — Fri, 31 May 2024 18:59:54 GMT

@JohnSal Or, you can just stick a wooden popsicle stick on it, so it won't be flexible! :-)

Serial trouble at startup with TimerCamX and Arduino

Mon, 01 Apr 2024 18:44:10 GMT

Anyone using PlatformIO? Unable to get serial terminal to work.

LukeS — Sun, 31 Mar 2024 19:54:03 GMT

Thanks guys adding the build flags fixed the blank serial terminal in PlatformIO.

C++ syntax question - Defining an object in a class that requires arguments?

pstoehr — Mon, 26 Feb 2024 17:01:14 GMT

@lukes said in C++ syntax question - Defining an object in a class that requires arguments?: HardwareSerial Maybe this solves your problem ... class StaticClass { private: int myContent; public: StaticClass(int v){myContent = v;} void printout(){printf("%d\n",myContent);} }; class TestClass { public: //StaticClass myClass = StaticClass(42); // With C11 StaticClass myClass; TestClass() : myClass(42) { } void doit() { myClass.printout(); } }; int main(void) { TestClass tc; tc.doit(); }

M5 RS485 Modbus slave sample code does not compile

robertoubeperuzzo — Sat, 17 Feb 2024 02:02:45 GMT

I'm having the same problem testing a similar example in https://github.com/m5stack/ATOM_DTU_LoRaWAN/blob/master/examples/Modbus/ModBus-RTU/Slave/Slave.ino Does anyone have a working example to share?

Atom LED and serial port (not USB) on Atom Switch Kit with M5Unified

felmue — Sat, 17 Feb 2024 01:00:51 GMT

Hello @LukeS I don't think the RGB LED has been integrated into M5Unified library for M5AtomLite. Even for M5AtomS3 the code for the RGB LED is kind of outside M5Unified library, e.g. in utility/LedDisplay.c. All I can find in M5Unified is the GPIO definition for the RGB LED for different M5Stack devices. However I don't think they are used. For M5AtomLite the RGB LED GPIO is (re-)defined and used from here. And for M5AtomS3 it is (re-)defined and used from here. Thanks Felix

Interfacing COM.X SIM7020G NB-IOT module with Arduino/STM32

jeetS — Sat, 24 Jun 2023 09:53:29 GMT

@felmue Thank you so much Felix ! Have a good day (:

"A fatal error occurred: Timed out waiting for packet header"

ajb2k3 — Mon, 22 May 2023 11:05:07 GMT

Have you got the correct port selected for the M5StickCPlus in arduino?

UHF RFID unit problems interfacing with arduino mega using code example from github

pierrethr — Fri, 21 Apr 2023 07:12:18 GMT

Hi @kasperhvid, any luck on that? I was hoping to do the same but all I get is an obscure "ERROR" response back from the getVersion() method.

Atom lite does not work with OTA

ajb2k3 — Thu, 13 Apr 2023 14:39:29 GMT

@kees No, its to do with the fact that not all browsers are written the same. for best results always use google chrome as its the most upto date with web development standards.

Unable to load new FW from Arduino IDE.

fbritop — Tue, 28 Mar 2023 02:07:35 GMT

@teastain This is en backtrace decoded: PC: 0x04d25826 EXCVADDR: 0x04d25824 Decoding stack results 0x40090d71: prvIdleTask at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/tasks.c line 3382 0x4008f5b6: vPortTaskWrapper at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/port.c line 143

Core2 Default Partitioning in Arduino IDE 1.X

mongonta555 — Mon, 20 Feb 2023 03:51:30 GMT

Hello, @wsanders The app0 and app1 partitions are used for firmware update with rollback in case of failure. It is also used by the OTA function. https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/ota.html

M5Stack.h: No such file or directory with M5StickCPlus?

wsanders — Wed, 08 Feb 2023 20:22:00 GMT

@wsanders At least with respect to the LCD library: The only function implemented so far to manipulate whole images is drawBitmap. drawJpg and drawJpgFile are commented out in https://github.com/m5stack/M5StickC-Plus/blob/master/src/M5Display.h so I assume they aren't working yet. So my workflow for now is: Save the image from gimp in gimp's ".h" format. This is smaller than a xpm or bmp. You will get a static char *data structure of all the pixels in the image. The .h file includes a macro to extract the pixels: #define HEADER_PIXEL(data,pixel) { pixel[0] = (((data[0] - 33) << 2) | ((data[1] - 33) >> 4)); pixel[1] = ((((data[1] - 33) & 0xF) << 4) | ((data[2] - 33) >> 2)); pixel[2] = ((((data[2] - 33) & 0x3) << 6) | ((data[3] - 33))); data += 4; } Write your own function rgb888to565 to compress the pixels into a uint16_t. Draw a bitmap of the image as fast as you can: #include #include "1.h" int pixel[3]; // pointer fu to preserve the start of .h data char *datastart; uint16_t *bitmap; void setup() { M5.begin(); M5.Lcd.setRotation(3); bitmap = (uint16_t *)malloc(height * width * 2); } void loop() { M5.Lcd.fillScreen(GREEN); datastart = data; for (int16_t y=0; y < height; y++) { for (int16_t x=0; x < width; x++) { HEADER_PIXEL(data, pixel); bitmap[60*y + x] = rgb888to565(pixel[0], pixel[1], pixel[2]); } } M5.Lcd.drawBitmap(0,0,width,height,bitmap); data = datastart; } Or you can use the Sprite library, which works well.

[Solved] "#include " doesn't compile

rh1972 — Thu, 12 Jan 2023 19:03:27 GMT

Well, it's working. The path to my Windows profile has a space in it. I created a local account without a space, and my empty program compiled with no issues. Don't know if that's the reason. Very strange. Makes me want to reinstall Ubuntu, or something. Thanks for the replies, Terry.

M5Paper: fast update to display keyboard entries

Fri, 30 Dec 2022 15:57:01 GMT

Stange interaction between clock and temprature sensor setup

EricR — Thu, 01 Sep 2022 12:04:21 GMT

Hi @felmue and thanks for the help. I changed GPIO and it works now. Strange as input port 2 worked when the temperature sensor were implemented separably. However I have spend enough time trying to make it work. So I will not conplain now that it is working. Thanks again