Cores

• T

  M5Paper EPD power consumption
  • tatar-andrei

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  The E-Ink Paper Display (EPD) on the M5Paper consumes power even when the screen is idle due to its underlying technology. E-Ink displays are different from traditional LCD or OLED screens in that they only consume power when the content on the screen is changed. Once an image or text is displayed on an E-Ink screen, it doesn't require any power to maintain that state. However, changing the content on the screen, such as refreshing to display a new image or text, does consume power. In your case, when the EPD power is disabled, the display is essentially turned off, and it consumes very little to no power because it's not actively refreshing the content. When you enable the EPD power and the display is idle, it's likely in a state where it's ready to receive new content and is therefore consuming some power in anticipation of a refresh. The power consumption you're observing is not necessarily a sign of a defective unit but rather a characteristic of E-Ink displays. If you want to optimize power consumption further for your low-power application, you might consider: Reducing Refresh Rate: Minimize the frequency of screen refreshes. E-Ink displays are typically used in applications where the content doesn't change frequently. You can adjust the refresh rate to be as infrequent as possible to save power. Full Screen Updates: Instead of partial screen updates, use full screen updates when you need to change the content. Partial updates can be more power-intensive. Deep Sleep: Continue using the deep sleep mode of the ESP32 when the screen is idle. This will significantly reduce overall power consumption. Optimize Code: Make sure your code is efficiently managing the display and other peripherals. Ensure that you are properly putting the ESP32 into deep sleep mode when it's not actively needed. Hardware Modifications: Depending on your specific use case, you might consider hardware modifications to further reduce power consumption. This could involve custom power management circuitry or using different power supplies.
• 

  Connecting temp sensor DS18B20 direct to A grove port - 5V supply vs 3.3v logic
  • arzaman

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  Hi @arzaman, Sorry to answer with a question, but I just want to check I've understood. You want to accommodate the 5V supply into this sensor and associated 5V? logic output from it down to the 3V3 input of StickC, Core2, etc? A couple of thoughts: #1 StickC has a 3V pin out on the end opposite Groove port, so I guess you could go from the head end of the StickC to sensor (reduce all to 3V3). #2 Copy the voltage divider circuit a lot of the M5Stack sensors use (they are quite cheap, so you could even use one as a donor and solder your sensor on to it). https://docs.m5stack.com/en/unit/dual_button #3 I've a feeling Seeed, DFRobot, Waveshare do a mini board to do such a thing, but probably equivalent to donor M5Stack part. If you used the M5Stack Mini Dual Button Unit as a donor/connection board. I suppose you could have two inputs, pin 32 and pin 33, hide the pull up resistors, etc. Or the Proto units, perhaps an easier solder at home proposition. Q) If it "can be powered from data line. Power supply range is 3.0V to 5.5V", would 5V power issue go away anyway? https://shop.pimoroni.com/products/temperature-probe-ds18b20-arduino-compatible-adapter?variant=39365415829587 (NB Alt schemtic for circuit)
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  CoreInk Multifunction Button not working
  • hooble

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• M

  M5Stack Basic V2.7: can't install library M5Stack
  • maze2904

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  @teastain Hi Terry, et al thx 1M for your effort helping me! I've just found the work around: As per "M5Stack Library won't install on Arduino IDE", CitrusPeel identified the issue: The package's name "MODULE_GRBL13.2" in library.properties should be "MODULE_GRBL_13.2" (underline instead of space before 13.2). So download M5Stack unzip it edit file "library.properties", line to "depends=M5Family,M5Module-4Relay,MODULE_GRBL_13.2,M5_BMM150" zip it and install zipped library restart IDE update now performed flawless @m5stack: awaiting M5Stack (0.4.6) to be released soon, as not all users having the knowledge on how to apply this "patch". Cheers, Marcus
• J

  CoreS3 touch with Arduino
  • jaysom

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  Hello @jaysom please find a simple touch application drawing random colored circles here. Thanks Felix
• S

  Core S3 with ENV3 sensor bug?
  • stefan-h

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  Nope still hanging
• D

  Core Ink: recognize if USB or battery powered
  • davincino

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  @davincino Thanks for posting your findings.
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  Connect COM.LTE to CoreS3?
  • aezero

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  I just made another discovery. If you power it up with the factory demo software, go the home screen, and then tap on "CORES3" six times, it puts you into a factory test mode
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  How recognize if CoreInk runs on battery?
  • Martin8bity

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  This topic is old, but I will reply if it is found through search functions: I found a solution, what can be applied with small external hardware modifications. It is possible to take some measurements on HAT interface's pin "5VIN". Measured voltages: If powered by USB: ~4.7V Powered by battery and switched off: ~0.7V Powered by battery and switched on: ~2.4V Using voltage divider with two same resistors, we get usable logic values for HIGH and LOW ( ~2.3V and ~1.2V). The measured values are not inside garanteed logic range but as a workaround: it works well. Maybe it helps someone else...
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  M5Stack Tough product lifetime
  • insaneLX

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  You would be better off directly contacting M5Stack about this but as the tough is a core2 and core2 is still being added to UIFlow, I wouldn't think it would be EOL that soon.
• D

  M5Paper wakeup cause
  • dov

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  To make this detection really reliable I had to change the RTC register check like this: Wire.begin(21, 22); uint8_t reason = M5.RTC.readReg(0x01); // now it's safe M5.begin(); // check reboot reason flag: TIE (timer int enable) && TF (timer flag active) if ((reason & 0b0000101) == 0b0000101) { restartByRTC = true; Serial.println("Reboot by RTC"); } else { restartByRTC = false; Serial.println("Reboot by power button / USB"); }
• M

  M5Paper Factory Software?
  • masterhacker

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  Did you click on the "Erase" button in M5Burner before burning the correct M5Paper firmware?
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  UIflow power functions Core INK
  • Cognitive5525

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  @cognitive5525 Thank you for your insight and investigation. I was facing same situation after my m5stack core2 lost its battery at all. Then I almost gave up development with m5stack since I'm not familiar to this ecosystem but it started restart again after your i2c cord had been tried. Thank you so much again!!
• Z

  I2S GPIO pins?
  • zalaking

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  @zalaking The schematic shows the following I2S pins on the CoreS3: GPIO00 I2S_LRCK, (Mic MCLK) GPIO13 I2S_DOUT/DAT0 GPIO14 I2S_DIN/DAT1 GPIO33 I2S_WCK (Mic) GPIO34 I2S_BCK (Mic)
• S

  how to make an image clickable with uiflow 2.0 on coreS3?
  • syrinebh

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• S

  why image+ is not showing on coreS3?
  • syrinebh

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  @ajb2k3 I'm getting the image from images section in google
• S

  How to scan nearby devices via bluetooth with core S3 ?
  • syrinebh

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  So, to scan nearby devices via Bluetooth with Core S3, you gotta go to the settings and click on the Bluetooth option. Once you're there, just tap on the "Scan" button, and your Core S3 will do its thing and find all the devices chilling nearby.
• S

  This topic is deleted!
  • syrinebh

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  CoreS3 internal battery?
  • pefortin

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  I also faced this problem. In my case, battery was fine, but connector was bad. Please check battery and pcb voltage.
• M

  M5Paper suggestion for multiple serial capture
  • mtylerjr

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  @holofloh I thought about it. The devices are not always that near near each other. Having them isolated is a bonus, also. I am trying with my Atom S3 (not the lite) because I think I blew up my s3-lite. UIFLOW2 has some bugs in the existing BLE code, on the AtomS3 - basic things like 'there is no "is_connected"...' Im not sure if there is enough implemented in UIFlow2 yet for actual BLE use with an Atom S3