Search found 1534 matches

by kolban
Sat Jun 23, 2018 11:50 am
Forum: General Discussion
Topic: Very accurate timer implementation
Replies: 1
Views: 8

Re: Very accurate timer implementation

My gut is saying I would look at the RMT peripheral functions. This appears to be able to record pulse transitions down to 12.5 nanoseconds (1/80Mhz). See:

http://esp-idf.readthedocs.io/en/latest ... s/rmt.html
by kolban
Fri Jun 22, 2018 11:32 pm
Forum: General Discussion
Topic: trying to read an ADC GPIO
Replies: 8
Views: 177

Re: trying to read an ADC GPIO

This is the page I normally go to:

http://esp-idf.readthedocs.io/en/latest ... /gpio.html

If it needs updating with new findings, post about it.
by kolban
Fri Jun 22, 2018 12:52 am
Forum: General Discussion
Topic: how to resolve packet loss issue?
Replies: 9
Views: 187

Re: how to resolve packet loss issue?

Over multiple tests, is it the same "piece" of the received file that differs from the original file? Can we tell where data is being lost? Are you logging the lengths of received data and sent data? I'd like to determine whether the problem is in transmitting data or writing files. For ex...
by kolban
Thu Jun 21, 2018 10:52 pm
Forum: General Discussion
Topic: trying to read an ADC GPIO
Replies: 8
Views: 177

Re: trying to read an ADC GPIO

I'd suggest wiring GPIO 35 directly to 3.3V and see if the output is other than 0. That will eliminate half the logic as a problem.
by kolban
Thu Jun 21, 2018 2:18 pm
Forum: General Discussion
Topic: how to resolve packet loss issue?
Replies: 9
Views: 187

Re: how to resolve packet loss issue?

Not really enough to go here (opinion). Is this a TCP or UDP socket? What makes you think that packets get lost? Are you checking the return code from send()?
by kolban
Thu Jun 21, 2018 2:12 pm
Forum: General Discussion
Topic: TCP server: assertion "netconn_alloc: undefined netconn_type" failed
Replies: 2
Views: 77

Re: TCP server: assertion "netconn_alloc: undefined netconn_type" failed

I think it would be useful to know which source statement in the user application is being called which generates the failure. Hopefully it is the same statement each time.
by kolban
Thu Jun 21, 2018 7:26 am
Forum: General Discussion
Topic: Maximum usable nvs in wroom32
Replies: 1
Views: 53

Re: Maximum usable nvs in wroom32

I'm not sure there is a hard-limit on NVS storage other than the amount of flash available and that you allocate. You may have to move the partition to a different location. If it starts at 0x9000 and the next partition starts at 0xf000 then the difference is 24K. You couldn't (for example) make it ...
by kolban
Thu Jun 21, 2018 7:18 am
Forum: ESP32 IDF
Topic: Installation and Use of Eclipse and ESP32 - Newbie on Eclipse
Replies: 1
Views: 76

Re: Installation and Use of Eclipse and ESP32 - Newbie on Eclipse

Howdy and welcome to the forum.

Here is a link to a good write-up on using Eclipse with ESP32.

http://esp-idf.readthedocs.io/en/latest ... setup.html
by kolban
Thu Jun 21, 2018 4:10 am
Forum: ESP32 IDF
Topic: (xQueueGenericReceive)- assert failed! after esp_wifi_scan_get_ap_records()
Replies: 2
Views: 66

Re: (xQueueGenericReceive)- assert failed! after esp_wifi_scan_get_ap_records()

I'll stick my neck out and say your problem is here: ESP_ERROR_CHECK(esp_wifi_scan_get_ap_records(&num_of_scanned_aps, &ap_records)); This statement asks to retrieve "num_of_scanned_ap" records and place them in the storage pointed to by "&ap_records". However, your d...
by kolban
Wed Jun 20, 2018 4:21 pm
Forum: General Discussion
Topic: libesphttpd on ESP32 using FreeRTOS under esp-idf
Replies: 1
Views: 72

Re: libesphttpd on ESP32 using FreeRTOS under esp-idf

If you are a fan of the C++ language then I'd like to point you to this possibility:

https://github.com/nkolban/esp32-snippe ... Server.pdf

There is also the commercial implementation made by Cesanta Mongoose.

https://github.com/cesanta/mongoose

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