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    erazor

    @erazor

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    Posts made by erazor

    • RE: M5-TOUGH / unable to change display brightness

      @felmue said in M5-TOUGH / unable to change display brightness:

      M5.Axp.SetLDOVoltage(3,3000);

      Hi Felmue!

      That one works, thanks a lot!

      Really confusing that there is a PWM backlight LED mentioned in the library which does not work. And that the usage of SetLcdVoltage is inconsistent between the Core2 and TOUGH.

      On Core2 the LcdVoltage changes DCDC3 (@param number 0=DCDC1 / 1=DCDC2 / 2=DCDC3 ) which is connected to LCD_BL. For the TOUGH on the other hand DCDC3 is unused and they used the LDO3.

      So maybe they should simply change the line SetDCVoltage(2, voltage); to M5.Axp.SetLDOVoltage(3,voltage); or maybe even better introduce a new function SetLCDBacklightVoltage(...) in their library.

      Thanks to all for your hints.

      posted in PRODUCTS
      E
      erazor
    • RE: M5-TOUGH / unable to change display brightness

      Well, yeah... but nothing works with the M5-TOUGH which should support it via the Axp.

      posted in PRODUCTS
      E
      erazor
    • RE: M5-TOUGH / unable to change display brightness

      Hi.

      No Luck with M5.Axp.SetLcdVoltage(...);
      The value has to be from 0-255 anyway.

      At the backside they mentioned the backlight:
      "BL: ACP_LDO3"

      So this seems to the same as in Core2.

      posted in PRODUCTS
      E
      erazor
    • M5-TOUGH / unable to change display brightness

      Hi.

      I'm using the latest library via Platformio (lib_deps = https://github.com/m5stack/M5Tough) and am unable to change the display brightness.

      My code is as simple as this:

      M5.Axp.SetLcdVoltage(2500);
      

      This does not change anything on the display.

      It works with the M5-Core2 module though.

      Can anybody confirm the SetLcdVoltage works for the M5-TOUGH?

      Thanks and have a great week.

      posted in PRODUCTS
      E
      erazor
    • RE: ATOM-DTU-NB-IoT - modem does not respond anymore

      @forairaaaaa you can find my code here:
      https://github.com/erazor83/nb_dtu_reset_issue/

      posted in Atom
      E
      erazor
    • RE: ATOM-DTU-NB-IoT - modem does not respond anymore

      Update for anybody who's reading this.

      My previous assumption that the reset-button kills the modem seems incorrect.

      I've had another two devices and carefully did not use the reset-button at all but these modules also stopped working.

      posted in Atom
      E
      erazor
    • RE: ATOM-DTU-NB-IoT - modem does not respond anymore

      @felmue thanks for your hints and your time!

      posted in Atom
      E
      erazor
    • RE: ATOM-DTU-NB-IoT - modem does not respond anymore

      @felmue there is nothing. I also removed and replaced Q3 with Q5. My idea was, that maybe Atom-RX line became output and killed Q3 but that's not the case.

      Removing the Q5 completely changed nothing.

      I ordered another two modules to check the signals but I start to think the issue is in the modem.

      Maybe I come to a point where I should ask the M5 team for help. This is kinda annoying, I really like the design of the DTU.

      posted in Atom
      E
      erazor
    • RE: ATOM-DTU-NB-IoT - modem does not respond anymore

      Well, yes.... "AT\r" should be enough and this was even mentioned in the datasheets.

      Anyway, mostly people use tinyGSM and "AT\r\n" should work anyway.

      I tried "AT\r" - no difference, the modem remains silent. I also tried a USB-USART connection with 3.3V levels and tried different baudrates, spamming the modem with any combination of "AT\r\n" - no success.

      Normally it has autobaud, if not it should start with "RDY" - I'm not getting anything with powerup. The modems LEDs blink but thats all.

      I saw that they're translating the logic-levels from 3.3V to 1.8V. I'm not sure but these are looking completely strange to me.

      0_1676556849878_IMAG001.BMP

      There shouldn't be any 3.3V peaks, right? The image shows my TX line, somewhere at transistor Q3. NB_RX and U1_RX are looking quite similar, so maybe the transistor is broken?

      posted in Atom
      E
      erazor
    • ATOM-DTU-NB-IoT - modem does not respond anymore

      Hi, I was playing with the DTU-NB some days ago until suddenly the modem stopped responding to any AT command.

      So I bought two new devices, and now none respond anymore.

      For testing I started to use "TinyGsmAutoBaud" (I also modified the code to use the correct PINs). With my first broken DTU - no response to any Baudrate.

      Since I seemed to broke the second module already and the TinyGsmAutoBaud also does not respond I simply put the Atom into my third unused DTU - which worked and got a response with 115200 - so the TinyGsmAutoBaud and Firmware seems to work.

      I tried the same Atom on my second (broken) DTU with no success. So I resumed playing with the third DTU, and pressed the rest button - and finally this one also does not respond.

      Is this a hardware issue? Any way to get the broken devices running again?

      Thanks for your time.

      posted in Atom
      E
      erazor