series of low-cost, low-power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth
Wikipedia
en.wikipedia.org › wiki › ESP32
ESP32 - Wikipedia
5 days ago - These chips feature a variety of processing options, including the Tensilica Xtensa LX6 microprocessor available in both dual-core and single-core variants, the Xtensa LX7 dual-core processor, or a RISC-V microprocessor. In addition, the ESP32 incorporates components essential for wireless ...
SimpleFOC Community
community.simplefoc.com › t › possible-bug-with-esp32-micros-function › 122
Possible "bug" with ESP32 micros() function - SimpleFOC Community
September 16, 2020 - Hi all, Being aware of the following bug with micros() function in ESP32 arduino, I have jumped into the FOCutils.cpp file and seen that the bug is probably called ☹ The bug is explained here: https://github.com/espressif/arduino-esp32/issues/1168 Trust me micros() is not reliable with ESP32.
Measuring pulse duration more accurately with ESP32
Hi everyone, I would like to measure a pulse duration of 32us (4 clock cycles at 125kHz). Therefor I set an interrupt on the according pin. The interrupt is triggered with the rising and falling edge and store the start & endtime with the funktion micros() in two diffrent variables. More on forum.arduino.cc
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May 31, 2022ESP32 micros() bug
On ESP32, micros() takes about 150 cycles. More on github.com
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March 12, 2022Sub microsecond delays on esp32
I have several ESP's and haven't used them due to my confusion about Timer hardware. I would want a Timer Interrupt for the task you describe. This discussion on sub-microsecond ESP timing seems well worth reading FYI If ESP Timers prove problematic, then I like your assembler-delay idea. It should be something you could tweak for the desired result -- if you have a way to write and load assembler to the ESP. hth, gl More on reddit.com
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December 18, 2021strange micros() behavior
Hardware: Board: Adafruit Huzzah32 Feather Core Installation/update date: 19-Feb-2018 IDE name: Arduino 1.8.5 Flash Frequency: 80Mhz Upload Speed: 921600 Description: I am trying to use a run-of-th... More on github.com
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March 3, 2018Videos
GitHub
github.com › espressif › arduino-esp32 › issues › 282
micros() & delayMicroseconds() not good enough · Issue #282 · espressif/arduino-esp32
March 23, 2017 - Calling micros() twice is in a row, takes nearly 50uS. Something line: uint32_t t0 = micros(); uint32_t t1 = micros(); uint32_t delta_t = t1 - t0; printf( "Delta = %u\n", delta_t ); // this prints around 51 on my system. Looking at the i...
Author espressif
GitHub
github.com › peufeu2 › ESP32FastMillis
GitHub - peufeu2/ESP32FastMillis: Faster millis() and micros() for ESP32 and AceRoutine · GitHub
The fix is simple: ESP32 has timers with hardware predividers, so this small piece of code just sets up TIMG0_T0 to run on 1 MHz, dividing APB clock by 80. Then, micros() is just two instructions to read the 32-bit micros value from the timer.
Author peufeu2
YouTube
youtube.com › hollanda academy
Mastering Time Control on ESP32: millis and micros Explained | Arduino IDE Tutorial - YouTube
Description:🚀 Unlock the power of time control in your ESP32 projects! In this comprehensive tutorial, I walk you through the usage of Time Delay, millis(),...
Published October 10, 2021 Views 887
Arduino Forum
forum.arduino.cc › projects › programming
Measuring pulse duration more accurately with ESP32 - Programming - Arduino Forum
May 31, 2022 - Hi everyone, I would like to measure a pulse duration of 32us (4 clock cycles at 125kHz). Therefor I set an interrupt on the according pin. The interrupt is triggered with the rising and falling edge and store the start & endtime with the funktion micros() in two diffrent variables.
SparkFun Electronics
sparkfun.com › sparkfun thing plus - esp32 wroom (micro-b)
SparkFun Thing Plus - ESP32 WROOM (Micro-B) - SparkFun Electronics
SparkFun Thing Plus - ESP32 WROOM (Micro-B)
This Feather-compatible ESP32 board features dual-core processing, WiFi, Bluetooth, a micro-B USB port, and a plug-and-play Qwiic connector.
Price $24.95
GitHub
github.com › pstolarz › OneWireNg › issues › 38
ESP32 micros() bug · Issue #38 · pstolarz/OneWireNg
March 12, 2022 - On ESP32, micros() takes about 150 cycles. I'm using 80MHz CPU clock to avoid wasting power, delayMicroseconds() calls micros() at least twice. This means delayMicroseconds() takes at least 330 cycles, corresponding to a delay of more th...
Author pstolarz
DeepBlue
deepbluembedded.com › home › blog › arduino micros() function – (millis vs micros)
Arduino Micros() Function - (millis vs micros)
August 17, 2023 - In this tutorial, we’ll learn how to use the Arduino micros() function instead of delay. We’ll discuss how the Arduino micros() function works and what are the use cases for it. And also the fundamental limitations of the micros() function and how to overcome the micros() overflow (rollover) ...
SparkFun Electronics
sparkfun.com › sparkfun pro micro - esp32-c3
SparkFun Pro Micro - ESP32-C3 - SparkFun Electronics
SparkFun Pro Micro - ESP32-C3
This SparkFun Pro Micro crams the powerful ESP32-C3, a single-core RISC-V powerhouse with 400KB of SRAM, into a compact 1.3in. x 0.7in. board.
Price $10.25
ESP32 Forum
esp32.com › viewtopic.php
how to SET esp_timer_get_time() ? - ESP32 Forum
I am using a time critial library (MCCI LMIC), that depends on micros() as monotonic time base. In arduino-esp32 micros() is hardwired to esp_timer_get_time(), which does not persist it's counter value during deep sleep. Thus micros() cannot act as a monotonic counter after waking up from sleep.
Hackster
hackster.io › news › sparkfun-s-pro-micro-range-gets-a-little-riscier-with-the-new-pro-micro-esp32-c3-risc-v-dev-board-054dd5983dd1
SparkFun's Pro Micro Range Gets a Little RISCier with the New Pro Micro ESP32-C3 RISC-V Dev Board - Hackster.io
March 20, 2026 - On the compact SparkFun Pro Micro, the ESP32-C3 — in the form of an ESP32-C3-MINI-1 module — clocks its single 32-bit processor core in at up to 160MHz, features 400kB of static RAM (SRAM) of which 16kB is used as cache, an additional 8kB of SRAM in the real-time clock (RTC), and 384kB of on-die ROM plus 4MB on-package flash.
Visual Micro
visualmicro.com › page › Espressif-ESP32-Overview.aspx
Espressif ESP32 Overview
December 22, 2022 - Once you have written your first sketch, you will need to build and upload it to the ESP32. Due to the variety of hardware and boards, this can be achieved in a number of ways: If your board has an on-board USB, simply connect this to your PC, and it should appear in the Ports List in Visual Micro:-
Espressif Systems
espressif.com › en › products › socs › esp32
ESP32 Wi-Fi & Bluetooth SoC | Espressif Systems
ESP32 is a feature-rich SoC with integrated Wi-Fi and Bluetooth connectivity for a wide-range of IoT applications.
Reddit
reddit.com › r/arduino › sub microsecond delays on esp32
r/arduino on Reddit: Sub microsecond delays on esp32
December 18, 2021 -
Do I have to write instructions in assembly? Im using Arduino IDE and im trying to sample a signal at 44.1khz. I come from a PIC Micro background where I would just use a TMR. Whats the play here in Arduino Land?
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I have several ESP's and haven't used them due to my confusion about Timer hardware. I would want a Timer Interrupt for the task you describe. This discussion on sub-microsecond ESP timing seems well worth reading FYI If ESP Timers prove problematic, then I like your assembler-delay idea. It should be something you could tweak for the desired result -- if you have a way to write and load assembler to the ESP. hth, gl
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Hmm I just did a search for "ESP32 asm code blocks" hoping that youmight be able to just place an __asm { blah } code block in the C/C++ but did not find it. But I did see people saying that just finding good docs on the assembly instructions themselves was difficult. One person I saw in this thread did have an Arduino project using asm for the Xtensa but it looks like it's less than straightforward. Most optimized C is hard to optimize much further without really knowing the ins and outs of the instructions, which seems difficult to ascertain? ripred edit: This guy has some serious digital audio chops and has created some seriously cool walkie talkies just out of ESP32's and I think making use of DMA. I just looked at it and I know he is getting 44kHz mono for his SD card audio recorder . I wouldn't be surprised if he's improved it to stereo. That might be close to what you're looking for?
ESP32 Forum
esp32.com › viewtopic.php
Wait microsecond - ESP32 Forum
Hi All, Please let me know if anyone has achieved this type of micro seconds delay support in application firmware. I need 10 and 40 microseconds delay support as per request. ... The arduino-esp32 core achieves this using the following code for the delayMicroseconds() func.
GitHub
github.com › espressif › arduino-esp32 › issues › 1168
strange micros() behavior · Issue #1168 · espressif/arduino-esp32
March 3, 2018 - The value of microseconds elapsed in that period of time is quite repeatable - i.e.
Author espressif
SparkFun Electronics
sparkfun.com › sparkfun micromod esp32 processor
SparkFun MicroMod ESP32 Processor - SparkFun Electronics
SparkFun MicroMod ESP32 Processor
This board combines Espressif's ESP32 with our M.2 connector interface to bring a power-packed processor board into our MicroMod ecosystem.
Price $19.95
GitHub
github.com › espressif › arduino-esp32 › issues › 1357
Troubles using micros()/millis() form esp-idf · Issue #1357 · espressif/arduino-esp32
April 26, 2018 - Board: ESP32 DEVKITV1 Core Installation/update date: 25/apr/2018 IDE name: Arduino IDE/IDF component Flash Frequency: 80Mhz Upload Speed: 115200 · micros() returns strange values when using arduino-esp32 as component of esp-idf, millis() returns ...
Author espressif