Search found 7 matches

by AshIsPurestWhite
Thu Aug 27, 2020 4:12 am
Forum: Hardware
Topic: Is GPIO different in ESP32-PICO-D4?
Replies: 1
Views: 3219

Re: Is GPIO different in ESP32-PICO-D4?

These pins can be used as GPIOs.
It seems that the writer of the datasheet of ESP32-PICO-D4 forgot adding GPIO function to pin description
by AshIsPurestWhite
Tue Mar 12, 2019 3:31 am
Forum: Hardware
Topic: External supply
Replies: 3
Views: 5104

Re: External supply

Using a efficient buck IC will help a lot. And what task you run may have a big impact for the battery life. You can measure the power consumption and the battery life by yourself. I think it's not too hard to operate.
by AshIsPurestWhite
Tue Mar 12, 2019 3:01 am
Forum: Hardware
Topic: Issues flashing brand new ESP32 Module
Replies: 3
Views: 6473

Re: Issues flashing brand new ESP32 Module

GPIO2 should be low, when booting ESP32 in UART mode. Please check this point first.
by AshIsPurestWhite
Wed Mar 06, 2019 6:44 am
Forum: Hardware
Topic: Cleaning ESP-Wroom32 Module
Replies: 1
Views: 4028

Re: Cleaning ESP-Wroom32 Module

I think the link below can answer your question:
https://www.instructables.com/id/Cleaning-up-your-PCB/
by AshIsPurestWhite
Mon Mar 04, 2019 7:05 am
Forum: Hardware
Topic: ESP32 WROOM32 on USB + Ext 5V on Vin
Replies: 4
Views: 17430

Re: ESP32 WROOM32 on USB + Ext 5V on Vin

if you connect EXT 5V and USB VBUS directly, there will be current flowing between EXT 5V and USB, since the voltage levels of these two power supply may be different(e.g. EXT 5V is 5.1V, while USB VBUS is 4.8V). And this current may damage either EXT 5V or USB. You can add a diode for each the powe...
by AshIsPurestWhite
Wed Feb 27, 2019 3:27 am
Forum: General Discussion
Topic: GPIO16 issue of ESP WROOM32
Replies: 13
Views: 16457

Re: GPIO16 issue of ESP WROOM32

Hi jadhavashitoshj48,
For the relay drive circuit,
1. try to add a flywheel diode across the coil
2. try to add a RC Snubber between NO and COM

see more infomation here: https://www.electronics-tutorials.ws/bl ... rcuit.html
by AshIsPurestWhite
Mon Feb 25, 2019 12:05 pm
Forum: General Discussion
Topic: GPIO16 issue of ESP WROOM32
Replies: 13
Views: 16457

Re: GPIO16 issue of ESP WROOM32

I think the schematic is OK, and you may check your code with respect to the GPIO init. You can post the code if you like. Also the GPIO may suffer noises from other part of the board. In this situation a larger value of the capacitor will help to solve the problem, e.g. 1uF.