Search found 4 matches

by ewgoncalves
Tue Jun 23, 2020 8:15 am
Forum: Hardware
Topic: esp32-wroom-32 start on battery power on without requiring boot button
Replies: 8
Views: 10416

Re: esp32-wroom-32 start on battery power on without requiring boot button

Hello, I had a solution from espressif support after exchanging some details of my circuitry. My issue was with the fact that I kept a capacitor attached to IO0. I used the dev kit schematic as a guideline, however, I think that in the latest update they also removed it. That capacitor does not let ...
by ewgoncalves
Wed Jun 17, 2020 2:03 pm
Forum: Hardware
Topic: esp32-wroom-32 start on battery power on without requiring boot button
Replies: 8
Views: 10416

Re: esp32-wroom-32 start on battery power on without requiring boot button

Hello mikemoy, Thank you for your reply, By following that suggestion do you mean that by applying an RC circuit to delay the activation of CHIP_PU? "...The chip should be activated after the power rails have stabilized. This is achieved by delaying the activation of CHIP_PU (Pin9) after the 3.3 V r...
by ewgoncalves
Tue Jun 16, 2020 3:25 pm
Forum: Hardware
Topic: esp32-wroom-32 start on battery power on without requiring boot button
Replies: 8
Views: 10416

Re: esp32-wroom-32 start on battery power on without requiring boot button

Hello Beowulff and thank you for your reply,
Yes, I have a 10k Resistor from EN to VDD (the same power supply as batteries) and a 0.1uF capacitor to GND.
Screenshot from 2020-06-16 16-24-49.png
Screenshot from 2020-06-16 16-24-49.png (10.03 KiB) Viewed 10389 times
Best regards,
by ewgoncalves
Mon Jun 15, 2020 2:55 pm
Forum: Hardware
Topic: esp32-wroom-32 start on battery power on without requiring boot button
Replies: 8
Views: 10416

esp32-wroom-32 start on battery power on without requiring boot button

Greetings, I have a custom board that integrates the esp32-wroom-32 with minimal peripherals. This device's application demands that the chip remains in deep sleep (~5uA) for most of the time. I currently have it operating with some batteries however, whenever I place a new set of batteries, I alway...