Search found 357 matches

by zliudr
Sat Nov 25, 2023 5:04 pm
Forum: General Discussion
Topic: Flashing and erasing both successful but ESP32 won't load code
Replies: 0
Views: 1482

Flashing and erasing both successful but ESP32 won't load code

I am pretty experienced with ESP-IDF at least between 2019 and 2022 and then moved on to micropython development on ESP32. I know what I'm doing but not with this symptom: It's a board I designed and personally populated and tested previously to success. After sending it to a user and getting it bac...
by zliudr
Wed Jun 21, 2023 3:58 pm
Forum: General Discussion
Topic: ESP32 wrover vs ESP32-pico-D4/V3
Replies: 0
Views: 1470

ESP32 wrover vs ESP32-pico-D4/V3

I'm looking at the esp32-pico-D4/V3 system on a chip solution as an alternative to the ESP32-WROVER modules. I know picos don't have SPIRAM but I can add that easily. What I've found so far is that WROVER integrates both QSPI FLASH and QSPI RAM so the bandwidth would be the highest. I'm reading pico...
by zliudr
Sat May 20, 2023 1:58 am
Forum: Documentation
Topic: Can I still download PDF format for ESP-IDF doc?
Replies: 2
Views: 3621

Re: Can I still download PDF format for ESP-IDF doc?

ESP_Sprite wrote:
Fri May 19, 2023 7:59 am
I still see a 'Download PDF' link at the bottom right of the document at the URL you linked, and that link seems to work.
Thank you! I wasn't aware the link was at the bottom of the page! I thought they were on the left side.
by zliudr
Thu May 18, 2023 1:54 pm
Forum: Documentation
Topic: Can I still download PDF format for ESP-IDF doc?
Replies: 2
Views: 3621

Can I still download PDF format for ESP-IDF doc?

Now it seems I can't find .pdf download of the ESP-IDF API guide anymore:

https://docs.espressif.com/projects/esp ... index.html

It's quite inconvenient to read this long document in a browser. I'd prefer .pdf file. Is there still any way to download?
by zliudr
Tue May 16, 2023 1:28 pm
Forum: Hardware
Topic: WROVER module with LAN8720A
Replies: 4
Views: 1327

Re: WROVER module with LAN8720A

Thanks for sharing. I didn't check stock of LAN8720A. I guess that's another reason to not use it, besides having to rig some mechanism on GPIO0 for uploading. I'm using micropython so my support is very limited, either the LAN8720A (and a few other PHY chips I can look for stock) or wiznet W5500, w...
by zliudr
Tue May 16, 2023 1:42 am
Forum: Hardware
Topic: WROVER module with LAN8720A
Replies: 4
Views: 1327

Re: WROVER module with LAN8720A

OK thanks. GPIO0 has CLK_OUT1 feature. I'll do some tests once I have WROOM+LAN8720A dev boards in hand. Does the trace have to have some impedance matching due to 50MHz frequency?
by zliudr
Mon May 15, 2023 7:57 pm
Forum: Hardware
Topic: WROVER module with LAN8720A
Replies: 4
Views: 1327

WROVER module with LAN8720A

I'm trying to put together a design with WROVER and LAN8720A. Based on existing designs such as the one with WROOM and LAN8720A, GPIO17 is used as EMAC_CLK_OUT. I wonder if there are any alternative pins for EMAC_CLK_OUT. Since WROVER uses GPIO17 for SPIRAM, if I can't use a different pin, then I'm ...
by zliudr
Sat May 13, 2023 3:41 am
Forum: IDEs for ESP-IDF
Topic: terminal terminates and idf_monitor runs wrong baud rate
Replies: 4
Views: 2847

Re: terminal terminates and idf_monitor runs wrong baud rate

I haven't used IDF for quite some time and just started using it again today. Installing the plugin was the easy part that used to be quite hard. I guess to answer your question why the monitor setting in the sdkconfig wasn't taken instead, it's just different developers. The sdkconfig setting is me...
by zliudr
Tue Mar 21, 2023 4:28 pm
Forum: General Discussion
Topic: Is GPIO13 a strapping pin with pulldown?
Replies: 2
Views: 1177

Re: Is GPIO13 a strapping pin with pulldown?

Thanks. I first read an esp32 datasheet I saved from 2020 and GPIO13 was said to have ie=1(input mode) after reset without mentioning wpd (internal pull-down). But then I downloaded the latest datasheet and confirmed that it was the case, just like you said. I wonder if this was added to the data sh...
by zliudr
Tue Mar 21, 2023 5:20 am
Forum: General Discussion
Topic: Is GPIO13 a strapping pin with pulldown?
Replies: 2
Views: 1177

Is GPIO13 a strapping pin with pulldown?

I know the strapping pins don't include GPIO13 but lately I've encountered an issue with GPIO13 "leaking" voltage. So I did this experiment: I connected a 10K resistor between GPIO13 and 3.3V. I then monitor the voltage between GPIO13 and GND. If there isn't any pulldown resistors, I should just rea...