Search found 16 matches

by doragasu
Tue Nov 19, 2024 1:55 pm
Forum: ESP32 Arduino
Topic: disable core 1 for saving power?
Replies: 8
Views: 16106

Re: disable core 1 for saving power?

Yes, you can choose "Run FreeRTOS on first core only" option in menuconfig, Component config > FreeRTOS menu and build the application again. That will disable 2nd CPU and all the tasks will run on the 1st. Does this really disable the second core? Or will it be active but idling? I have an app run...
by doragasu
Fri Mar 22, 2024 12:35 pm
Forum: Documentation
Topic: esp_modem: unsolicited response, URC
Replies: 2
Views: 16676

Re: esp_modem: unsolicited response, URC

A bit late but today I was wondering the same. It looks like it is possible but not trivial, it involves creating a custom DCE, here is a patch that incorporates it to the console example: https://github.com/espressif/esp-protoc ... 660991194c
by doragasu
Mon Sep 18, 2023 12:20 pm
Forum: Hardware
Topic: ESP32-S3 LNA_IN Impedance
Replies: 3
Views: 3887

Re: ESP32-S3 LNA_IN Impedance

The impedance has not yet been added to the datasheet. Is there any info on this?
by doragasu
Fri Jul 28, 2023 10:44 am
Forum: ESP-IDF
Topic: ESP32 RF Test Tool and TX Tone Functionality
Replies: 3
Views: 3709

Re: ESP32 RF Test Tool and TX Tone Functionality

In an interesting turn of events, this seems to be supported by latest esp-idf (5.1), including documentation and an usage example ! Unfortunately only ESP32-S3 and ESP32-C3 support this feature right now, so for the good old ESP32, we still have no way to do it. I have opened a GitHub issue to see ...
by doragasu
Thu Jul 27, 2023 7:12 am
Forum: ESP-IDF
Topic: ESP32 RF Test Tool and TX Tone Functionality
Replies: 3
Views: 3709

Re: ESP32 RF Test Tool and TX Tone Functionality

This feature could also save me a lot of time for some lab tests, so I dug a bit more into it without success. My findings in case anyone wants to try: the ESP32 ROM exports three functions with suspicious names: * rom_start_tx_tone() * rom_start_tx_tone_step() * rom_stop_tx_tone() The stop function...
by doragasu
Thu Feb 02, 2023 9:53 am
Forum: General Discussion
Topic: What's the meaning of wifi_pkt_rx_ctrl_t::ampdu_cnt?
Replies: 0
Views: 1158

What's the meaning of wifi_pkt_rx_ctrl_t::ampdu_cnt?

For my application, I am trying to obtain information of AMPDU frames, I need to identify which frames start, end or are in the middle of an AMPDU transmission. I made a program that prints the aggregation and ampdu_cnt fields in the wifi_pkt_rx_ctrl_t structure (obtained for each frame captured in ...
by doragasu
Tue Jan 31, 2023 9:07 am
Forum: ESP-IDF
Topic: How to obtain wifi packet rate in sniffer application?
Replies: 1
Views: 1790

Re: How to obtain wifi packet rate in sniffer application?

After reviewing carefully the capture, it looks like rate uses the wifi_phy_rate_t, but confirmation would be nice.
by doragasu
Mon Jan 30, 2023 10:57 am
Forum: ESP-IDF
Topic: How to obtain wifi packet rate in sniffer application?
Replies: 1
Views: 1790

How to obtain wifi packet rate in sniffer application?

I want to build an application to measure WiFi channel load. This requires computing air time of received packets. My approach is: 1. Configure ESP32 in promiscuous mode, enable reception of all kind of packets. 2. In the rx callback, obtain the packet rate and packet length. 3. Using the rate and l...
by doragasu
Wed May 18, 2022 1:48 pm
Forum: Hardware
Topic: Certificacion: cannot pass wifi mask tests when using custom firmware
Replies: 1
Views: 1815

Certificacion: cannot pass wifi mask tests when using custom firmware

Hi, We have a product using an ESP32 MCU on a custom board. When performing transmission tests in 11b mode (1 Mbps, 20 dBm output), with our custom firmware, we cannot pass the wifi masks as per this figure: https://i.imgur.com/ZSDPDLa.png When we do the test with our firmware, the side lobes are to...
by doragasu
Thu Apr 01, 2021 6:53 pm
Forum: General Discussion
Topic: RMT based NeoPixels (WS2812B) flickers when WiFi is used
Replies: 24
Views: 41287

Re: RMT based NeoPixels (WS2812B) flickers when WiFi is used

Well, it turns out reading the forum helps :lol:

I have changed the initialization to be done from a task pinned to core 1 (that I delete when finished using vTaskDelete(NULL)), and that has completely removed the glitches!