LoPy Brownout detector trigered with last firmware .

[stef]

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.

[Smeedy]

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.

[stef]

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.