Hello all,
I made a design of the board and use ESP32-WROOM-32E module
I have a hardware issue when ESP32 not running a Firmware after power up until strap GPIO0 to GND after a module boot,
Module flashing works well, bootloader works properly,
when checking with with scope , all Strapping pins are at proper level:
GPIO0- 1
GPIO12- 0
GPIO2- 0
GPIO15- 1
After power up, short GPIO0 to GND and only then FW start to run,
before ESP32-WROOM-32E used with ESP32-WROOM-32D and all worked well,
Removed all capacitors from Enable and GPIO0 and still not running the FW,
Is there is some problem in hardware design or timing problem that i can't find...
Will be very appreciated for some assistance/advise,
Eduard
ESP32-WROOM-32E Not running FW in normal boot mode
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- Posts: 9766
- Joined: Thu Nov 26, 2015 4:08 am
Re: ESP32-WROOM-32E Not running FW in normal boot mode
At the very least, we'll need a schematic to debug this.
Re: ESP32-WROOM-32E Not running FW in normal boot mode
Attached schematic,
C7,C7 and Q5 removed,
R15 assembled
not solved the issue either,
Attached also video to show a board behavior
C7,C7 and Q5 removed,
R15 assembled
not solved the issue either,
Attached also video to show a board behavior
- Attachments
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- InShot_20240108_130208568.gif (17.93 MiB) Viewed 16682 times
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- esp32 schematic + buttons
- esp32_schematic.png (135.04 KiB) Viewed 16682 times
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- Posts: 9766
- Joined: Thu Nov 26, 2015 4:08 am
Re: ESP32-WROOM-32E Not running FW in normal boot mode
That behaviour doesn't make any sense given the schematic you've shown. Any chance something physical is wrong with the PCB, like a loose connection or a soldering bridge?
Re: ESP32-WROOM-32E Not running FW in normal boot mode
This kind of behavior is on 2 types of PCB,
Current schematic has been designed properly ?
Why to make board run the FW I need to strap GPIO0 to the GND by pressing the button ?
Current schematic has been designed properly ?
Why to make board run the FW I need to strap GPIO0 to the GND by pressing the button ?
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- Posts: 9766
- Joined: Thu Nov 26, 2015 4:08 am
Re: ESP32-WROOM-32E Not running FW in normal boot mode
I cannot tell you that, as from the PCB I see no indication that the ESP32 would behave this way.
Can you see what TXD0 outputs when you boot the ESP?
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