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by boarchuz
Mon Dec 02, 2019 5:49 am
Forum: ESP32 IDF
Topic: ULP coprocessor wakeup + RTC_PERIPH ON
Replies: 0
Views: 56

ULP coprocessor wakeup + RTC_PERIPH ON

The Sleep Modes documentation notes: Revisions 0 and 1 of the ESP32 only support [ULP coprocessor wakeup] when RTC peripherals are not forced to be powered on (i.e. ESP_PD_DOMAIN_RTC_PERIPH should be set to ESP_PD_OPTION_AUTO). https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/syst...
by boarchuz
Thu Nov 28, 2019 10:49 pm
Forum: ESP32 Arduino
Topic: GRRRR How can I use ESP32 to SEND and RECEIVE GET Requests simultaneously?
Replies: 11
Views: 324

Re: GRRRR How can I use ESP32 to SEND and RECEIVE GET Requests simultaneously?

kermitfuckingfrog wrote:
Thu Nov 28, 2019 7:26 pm
My watchdog get's triggered
Have a read over the documentation here and you'll see what the problem is:
https://github.com/me-no-dev/ESPAsyncWebServer
by boarchuz
Sat Nov 23, 2019 10:51 pm
Forum: ESP32 IDF
Topic: Is it possible to protect against excessive deep-sleep delays?
Replies: 7
Views: 346

Re: Is it possible to protect against excessive deep-sleep delays?

You could write your own little watchdog using the ULP coprocessor to generate an interrupt if it's not fed for x hours/days/weeks. I suppose that's subject to the same kind of hiccup but what are the odds of it happening twice? (Really, what are the odds of it happening even once?)
by boarchuz
Wed Nov 20, 2019 1:35 pm
Forum: ESP32 IDF
Topic: Is it safe to use unused register address space?
Replies: 4
Views: 324

Re: Is it safe to use unused register address space?

Just because there is address space does not mean there is a physical memory element there. I'm not ready to give up on this yet but it looks like I've got some reading to do... Thanks again for your help. ******************************************************************************************* O...
by boarchuz
Wed Nov 20, 2019 2:14 am
Forum: ESP32 IDF
Topic: Is it safe to use unused register address space?
Replies: 4
Views: 324

Re: Is it safe to use unused register address space?

Are there actual functional registers there or do the other registers just have duplicate access at those addresses? To my untrained eye it seems that from the end of the addresses here: https://github.com/espressif/esp-idf/blob/a45e9985344575a80acb1dc9c12e7bec4d8af401/components/soc/esp32/include/...
by boarchuz
Wed Nov 20, 2019 12:38 am
Forum: ESP32 IDF
Topic: Is it safe to use unused register address space?
Replies: 4
Views: 324

Is it safe to use unused register address space?

It occurs to me that it would be possible to use the REG_RD and REG_WR instructions in a ULP program to effectively carve out some address space for custom purposes. I have a ULP program with a lot of boolean-type variables which are very expensive in terms of RTC memory (4 bytes each), where these ...
by boarchuz
Mon Nov 18, 2019 3:16 am
Forum: Hardware
Topic: Use NC pins on WROOM and WROVER to relay power?
Replies: 4
Views: 236

Re: Use NC pins on WROOM and WROVER to relay power?

Incidentally, I just had some PCBs delivered 5 minutes ago where I've done something similar on a little 2-layer board. What I did was to edit a custom WROOM footprint where I've removed the pad entirely (ie. There's soldermask where that pin will be on the WROOM, so it won't be soldered to the boar...
by boarchuz
Sun Nov 17, 2019 8:45 pm
Forum: General Discussion
Topic: GPIO isr service
Replies: 2
Views: 211

Re: GPIO isr service

It's safe:

https://github.com/espressif/esp-idf/bl ... pio.h#L631
return ESP_ERR_INVALID_STATE ISR service already installed.
by boarchuz
Thu Oct 17, 2019 7:16 am
Forum: ESP32 Arduino
Topic: Error sending array > around 255 bytes
Replies: 4
Views: 325

Re: Error sending array > around 255 bytes

char htmlResponse[35000];
Do you really need 35k for that little json?
Make it much much smaller or allocate dynamically.

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