Search found 37 matches

by PanicanWhyasker
Sat Jan 12, 2019 8:45 am
Forum: ESP-IDF
Topic: Functions for getting/setting the SPI flash frequency
Replies: 1
Views: 1662

Functions for getting/setting the SPI flash frequency

Background One of the promising suggestions I got in my other thread was to try lowering the flash frequency from 80 MHz to 40 MHz, which I would want to try ASAP, however the devices I want to try that on are on the field for testing - I can only OTA update them. AFAIK the flash frequency can only...
by PanicanWhyasker
Fri Jan 11, 2019 4:34 pm
Forum: Hardware
Topic: ESP32 (D0WD) instability
Replies: 12
Views: 6568

Re: ESP32 (D0WD) instability

@jcsbanks, thanks for the pointer, I will try that very soon.

@mikemoy, fair point, I will try that when possible. I'm thinking about just wrapping the whole device in 2-3 layers of aluminium foil, that's probably good enough for the test, what do you think?
by PanicanWhyasker
Fri Jan 11, 2019 5:08 am
Forum: Hardware
Topic: ESP32 (D0WD) instability
Replies: 12
Views: 6568

Re: ESP32 (D0WD) instability

@jcsbanks, it's 80 MHz.

@mikemoy, noted, yet I think if it is in a shielded box, wouldn't that seriously impede the WiFi signal?
by PanicanWhyasker
Thu Jan 10, 2019 4:22 pm
Forum: Hardware
Topic: ESP32 (D0WD) instability
Replies: 12
Views: 6568

Re: ESP32 (D0WD) instability

Update: it's likely a HW issue, not fixable in software, but I'm still curious: the crash happens even if only the car's chassis ground is connected to my device's GND. No other signals or inputs into the device, just connect car GND with device GND. Does this shed any light?
by PanicanWhyasker
Mon Jan 07, 2019 1:30 pm
Forum: Hardware
Topic: ESP32 (D0WD) instability
Replies: 12
Views: 6568

Re: ESP32 (D0WD) instability

OK, an update: I was able to be present with the laptop when a device crashed this way. The message it printed when it crashed was Gr eiainErr oe1 ai'd(nerp d ieu nCU) Which (it seems that every other char was skipped for some reason) should be Guru Meditation Error: Core 1 panic'ed (Interrupt wdt t...
by PanicanWhyasker
Mon Jan 07, 2019 5:00 am
Forum: Hardware
Topic: ESP32 (D0WD) instability
Replies: 12
Views: 6568

Re: ESP32 (D0WD) instability

This is unfortunately what I can't do, since it doesn't reboot/crash in lab settings, and it would be next to impossible to install a UART logger attached to the device in the field application.
by PanicanWhyasker
Sun Jan 06, 2019 2:14 pm
Forum: Hardware
Topic: ESP32 (D0WD) instability
Replies: 12
Views: 6568

ESP32 (D0WD) instability

Hi, I've designed a ESP32-based device on a custom circuit board (using bare ESP32 D0WDQ6 chips, rev1) and unfortunately I'm facing some instability issues that are very hard to reproduce. The issue is that, when the device is used, at some point it seems to reset into bootloader or something simila...

Go to advanced search