FAQS

• 

  Change font size in python
  • loboris

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  Note, Do not submit questions in this section.
  • m5-docs

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  PIR motion sensor compatibility with LAN W5500 Proto Module
  • btrex

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  Hello @btrex not sure I understand why the LAN module removes port B. Do you mean the LAN module uses the GPIOs normally used for port B? Anyways, if you are using an M5Core2 device this module might help. And for an M5Stack device the bus module might be helpful as it exposes all pins. Thanks Felix
• V

  Problems writing to SD Card
  • vsthose

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  @stoni99 , yes, I have the same issue with my "picky" M5Stack. Samsung 64GB EVO plus XC Speedclass 3 are working fine, but I can no longer find it on Amazon. Sometimes Sundisk 32GB V30 are working, but in the next insert they refuse to work. Is it really the card or the software?
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  http requests do not resolve local dns
  • sgu

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  @ajb2k3 This looks very nice, I'll try it out. Thanks for your post !
• O

  RFID. How to reach maximum distance?
  • Oleksii

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  Hi, About change "region": I implement the reader U107 (JRD-4035) with an USB to serial TTL UART interface (a TTL-232R-5V-PCB fron FTDI Chip) and can drive this reader with a serial terminal software as RealTerm (that supports frame of hex bytes) for simple tests (with Pyserial for a more evolved application). Then it is possible to check active "region" parameter, by send the command frame: 0xBB 0x00 0x08 0x00 0x00 0x08 0x7E. After a power On, the response is: BB 01 08 00 01 01 0B 7E corresponding to "China 900MHz" (01). We have to send the command: 0xBB 0x00 0x07 0x00 0x01 0x03 0x0B 0x7E to pass in "EU region", the reponse after the command: 0xBB 0x00 0x08 0x00 0x00 0x08 0x7E, is BB 01 08 00 01 03 0D 7E region parameter has well switched to "EU region" (03). (note: if the USB dongle is unplugged then plugged, the region parameter returns to '01') About documentation on this reader: I used this manual "https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/unit/uhf_rfid/MagicRF M100%26QM100_Firmware_manual_cn.pdf" and "translate Google tool" (the en version of the manual is not sufficient). Best, Thierry PS: the link between U107 and the FTDI interface module is: TXD/U107 to RXD/FTDI, RXD/U107 to TXD/FTDI, 5V to VCC and GND to GND.
• B

  M5Paper - Flickering when updating screen
  • BBulMushroom

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  Hello @ajb2k3 thank you for the valuable reminder about the screen refresh rate. My above example is meant to show that it is possible to do a refresh w/o flickering even after a shutdown. Thanks Felix
• K

  Error : can't create thread
  • kawabatapaper

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  Thank you for your message. I posted my program. I got an error in the same time several times in this program. So, I measured the sensor value every 5 seconds, but I extended it every 10 seconds. I don't know if that was good, but so far it hasn't stopped for 3days. Please let me know if there is anything else you know.
• S

  I don't know how to send a lot of data per time by BLE(Bluetooth low energy)
  • stackyarou

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  Hello @stackyarou it looks like the limiting factor is the MTU which by default is set to 23 bytes. I've tried to set a higher MTU on both sides using BLEDevice::setMTU(40);, but it did not help. I read somewhere that 23 bytes is the maximum for BLE 4.2 so maybe that is the reason? Thanks Felix
• O

  ECG Module13.2 AD8232 pin mapping
  • OfureAlakhume

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  Hello @OfureAlakhume the M5Stack M-Bus is described here and the ECG Module seems to use GPIO13, GPIO5, 5 V and GND. Thanks Felix
• R

  Keyboard Input (bluetooth keyboard, USB keyboard)?
  keyboard usb bluetooth • • rodberry

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  We have the same problem, I might take a look at the replies
• G

  Remove Default apps from m5 core
  • ganeyvim

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  UnitV2 Linux Firmware?
  • Asmodev

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  I am in the same situation, I ask for more details thank you in advance
• H

  SK6812 RGBW
  • Henry Schmidt

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  I heard from my supplier that SK6812RGBW has been stopped production and updated to SC6812RGBW,SC6812RGBW quanlity is better than SK6812RGBW. Here is SC6812RGBW led datasheet:http://www.normandled.com/upload/202102/SC6812RGBW LED Datasheet.pdf
• S

  [SOLVED] How to charge M5StickC and M5StickC Plus (beyond 3.7V)?
  • sloflo

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  Danke @felmue , Your answer pointed me in the right direction. The voltage between GND and BAT pins was indeed 4.0V+, so I went back to check my code. I noticed that the official documentation for the AXP on the M5StickC only mentions M5.Axp.GetVbatData() (which is what I used and what gave me weird readings) but the AXP code example uses M5.Axp.GetBatVoltage() and the latter actually gives me the correct number. What's the difference between these two? Is it just the *1.1/1000? Cheers, Flo
• L

  My M5Stick doesn't boot
  m5stick • • lelepg

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  Sound like the battery protection circuit has tripped. Try pluging it into a none intelleegent USB charge for around 5 hours (with the charger switched on) and see if it come to life. If not, it could be that it has died and needs replacing.
• T

  About power supply of M5stack
  • takero

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  @m5stack I supplied 5v to Ⅿ5 BASIC, but it doesn't work. Why? I connected + 5.1v to the pin socket battery and connected -t o GND. Is it not possible to supply power from the pin socket?
• Z

  working / running with PC and USB connection. Not work/run at standalone without PC. Why?
  • zoroaster

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• C

  ScanDisk Ultra microSDH card compatible with the M5Stack disk drive?
  • Carles B.

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  Thanks again @world101 , solved. Ho I'm really bad looking for M5Stack documentation, or documentation is missing.
• 

  How to use AESLib.h with M5.
  • ryokutya_hos

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