LoPy Brownout detector trigered with last firmware .



  • Hi all ,
    i have 6 Lopy working nicely as BLE scanner with an ER17505 battery ( lithium 3.6V).
    Adding two more give me some problems.... with the last firmware and same setup (battery / program )
    the two LoPy just go into a reset loop with :

    Brownout detector was triggered

    ets Jun 8 2016 00:22:57

    rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
    configsip: 0, SPIWP:0xee
    clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
    mode:DIO, clock div:1
    load:0x3fff9010,len:12
    ho 0 tail 12 room 4
    load:0x3fff9020,len:388
    load:0x40078000,len:11584
    load:0x4009fb00,len:848
    entry 0x4009fc9c

    Is there a way to lower the brownout level or any workarround for this firmware ?
    Can i downgrade the firmware anymore ( i saw that the last i flashed required a program update ) ?

    thank's in advance.

    Stéphane A.



  • This was due to a change in the ESP32 IDF a couple of month ago. I've seen the brownout also in some C projects on the WROOM32. Make sure you can compensate when the MCU is spiking in power consumption by placing a big capacitor in the circuit. Google is your friend.



  • ok ,
    After flashing back to 1.6... no more problems.
    so 3.6V powered ( on 5V or 3.3V ) with this kind of battery issue a BDO with last firmware.
    Maybe this information can help others.

    Stéphane A.


 

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