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.


Log in to reply
 

Pycom on Twitter

Looks like your connection to Pycom Forum was lost, please wait while we try to reconnect.