Search found 4 matches

by anfractuosity
Thu Aug 27, 2020 7:12 pm
Forum: Hardware
Topic: esp32 keeps rebooting, with custom pcb
Replies: 2
Views: 2935

Re: esp32 keeps rebooting, with custom pcb

Thanks for the tips! It looks like with esptool I can both write and read to/from the flash ok, from what I understand. I've also tried other firmware such as that of micropython and nodemcu, with the same rebooting loop. I also tried turning off the hardware brownout detection in the firmware. I'll...
by anfractuosity
Thu Aug 27, 2020 1:07 pm
Forum: Hardware
Topic: esp32 keeps rebooting, with custom pcb
Replies: 2
Views: 2935

esp32 keeps rebooting, with custom pcb

Just wondering if anyone can spot any hardware issues with the attached schematic? When doing - picocom /dev/ttyUSB0 -b115200 I notice the esp32 keeps rebooting unfortunately. I was able to flash the 'getting started' example, which appeared to flash fine, but unfortunately I can't seem to get it to...
by anfractuosity
Sun Jun 14, 2020 12:19 pm
Forum: Hardware
Topic: esp32-d0wd pcb, can't connect with esptool
Replies: 3
Views: 3400

Re: esp32-d0wd pcb, can't connect with esptool

Thanks a lot for your reply. I just measured the xtal pins and there definitely seems something weird. I've not tried to measure an xtal frequency before, but hopefully I've done this correctly, I set AC coupling, and measured pin 3. This should be the xtal which has been placed - https://www.mouser...
by anfractuosity
Sat Jun 13, 2020 7:07 pm
Forum: Hardware
Topic: esp32-d0wd pcb, can't connect with esptool
Replies: 3
Views: 3400

esp32-d0wd pcb, can't connect with esptool

Hi, I just found this forum, after I made my PCB, I wish I'd seen it sooner ;) With esptool I get the error 'Timed out waiting for packet header' when trying to connect. I've attached a schematic and pcb photo, I have since added a 10K pull up resistor on GPIO0 to 3.3V, so that the correct logic lev...