Example: delay_microseconds (2000000) //waits for 2 seconds. delayMicroseconds () is a cycle-counting loop, so it doesn't include any time taken by background functions like interrupts. To delete the timer when it is no longer needed, call esp_timer_delete (). Delay and timing¶ Use the time module: import time time . Note that this is busy-waiting, so unlike vTaskDelay it does not allow other tasks to run (it just burns CPU cycles. Internally, esp_timer uses a 32-bit hardware timer (FRC1, “legacy” timer). As a workaround, I'm using something like this: use esp_idf_hal:: delay:: {Ets, FreeRtos}; /// A `Delay` implementation that uses [`Ets`] for delays <10 ms,. Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly. 2. You guys have made an extremely impressive platform, to say the least. Code: Select all. Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly. However, this crashes my ESP32 every time. @rahmanshaber The ESP32-C3 does support deep sleep with external wakeup. For the ESP-IDF board, we have chosen the custom board option. Post by filo_gr » Thu Sep 09, 2021 6:57 am . Raising the level, the interrupt handler can reduce the timer processing delay. The delayMicroseconds function, on the other hand, does not yield to other tasks, so using it for delays more than 20 milliseconds is not recommended. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. This does shave 10-20uS from each transaction. I'm not sure this behaviour has ever been different in ESP-IDF, with the test app posted above I see the same behavior on v3. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. However, improving execution speed may have trade-offs with other aspects of performance such as Minimizing Binary Size. The dummy phase. 3. [ −] pub struct Ets; Espressif built-in delay provider for small delays. Step 5: The complete connection. Since I am taking differences the constant term is not important, and the 130 ns is acceptable. doing some math to convert it to microseconds. There is no Arduino RMT API that solves this issue (which IMO - is not a real issue, but a. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. I dont get any delay even if I add some different delays. Each group has two general-purpose hardware timers. 5us delay when ESP works at 80MHz. Will memory leak occur when ESP32 TCP repeatedly closes and rebuilds socket (IDF 3. FreeRTOS (ESP-IDF) FreeRTOS (Supplemental Features) Heap Memory Allocation. event_base – [in] the event base that identifies the event. このプログラムの中で「ESP32にdelayMicrosecondsがない」としてシステム時間の計算をして擬似的にμsのdelayを行なっていました。. ESP32 integrates two I2S controllers, referred to as I2S0 and I2S1, both of which can be used for streaming audio and video digital data. h> // Sets the name of the audio device btAudio audio = btAudio ( "ESP_Speaker" ); The string that you supply to the btAudio object becomes the name of the ESP32 Bluetooth connection. Delay a task until a specified time. This is the header file that is required to include the SPI Master driver: #include "driver/spi_master. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. 3. Board index English Forum Discussion Forum ESP-IDF; IDF documentation suggests microsecond delay - should be millisec. In deep sleep mode, CPUs, most of the RAM, and all the. Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly. flashierbrake9 November 8, 2023, 4:44pm 1. Internally, esp_timer uses a 64-bit hardware timer, where the implementation depends on the target. 0. The ROM function ets_delay_us() (defined in rom/ets_sys. Take a look at Using millis() for timing. The following optimizations will improve the execution of nearly all code - including boot times, throughput, latency, etc: Set CONFIG_ESPTOOLPY_FLASHFREQ to 80 MHz. Hello community, I made a. A transaction on the SPI bus consists of five phases, any of which may be skipped: The command phase. I dont get any delay even if I add some different delays. hw_timer_t * timerBegin(uint32_t frequency); frequency select timer frequency in Hz. Points (x) show quantiles associated with (from bottom to. and 2. However, improving execution speed may have trade-offs with other aspects of performance such as Minimizing Binary Size. The address phase. Hello community, I made a. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. The ESP32 Wi-Fi programming model is depicted as follows: Wi-Fi Programming Model. The spi_flash component contains API functions related to reading, writing, erasing, memory mapping for data in the external flash. As you can see I measure the time between two instants using esp_timer_get_time() (this funcion returns an uint64_t with the number of microseconds starting from the power up). h I was able to call esp_wifi_get_tsf and get a result!Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly. And the most important things that delay() will pause the execution of other codes. To create a timer, call esp_timer_create (). With the ESP32 running at 240Mhz it is 0. 0, however some functions of FreeRTOS v9. The event loop library keeps a copy of event_data and manages the copy’s lifetime automatically (allocation + deletion); this ensures that the data the handler receives is always valid. 13 posts 1; 2; Next; Ritesh Posts: 1325 Joined: Tue Sep 06, 2016 9:37 am. One is to wait for a period after resetting a chip (BME280). Footnotes. After configuring the wakeup sources, the ESP32 board can enter deep sleep by the following call. To say it works is really stretching it. So, Normal communication with that module using ESP32 is UART but. Currently, the largest value that will produce an accurate delay is 16383; larger values can produce an extremely short delay. High Resolution Timer (ESP Timer) Internal and Unstable APIs. Oh, now that IS useful! - now I wish I hadn't just spent the last hour implementing the exact same thingThis callback function is called from the esp_timer task each time the timer elapses. I also used portTICK_RATE_MS but the speed didnt change . Click ‘Choose Template’ button to proceed forward. Dimming Neopixels, Delays<Microseconds. esp_timer set of APIs provides one-shot and periodic timers, microsecond time resolution, and 52-bit range. The exact hardware timer implementation used depends on the target, where SYSTIMER is used for ESP32-S3. 240. 13 posts 1; 2; Next; Ritesh Posts: 1332 Joined: Tue Sep 06, 2016 9:37 am. This is the documentation for Espressif IoT Development Framework ( esp-idf ). Delay in uS. ESP Wi-Fi supports up to {IDF_TARGET_MAX_CONN_STA_NUM} (``ESP_WIFI_MAX_CONN_NUM``) Wi-Fi connections. us: Number of microseconds to pause . On a congested wireless channel (meaning lots of other devices broadcasting) you'd routinely see 100+ ms latencies as your devices have to wait for a free radio slot. In the Extension, select ESP-IDF option: We will click the ‘ esp_timer ’ under the System tab. The constant portTICK_PERIOD_MS can be. 2. The CPU is executing at a constant processor clock rate. I can imagine this takes a few cycles. Hardware Configuration a Potentiometer is connected to my broad and used as Analogue input. red. Sometimes it delays for exactly 2 seconds but sometimes it misses 10ms. 13 posts 1; 2; Next; Ritesh Posts: 1325 Joined: Tue Sep 06, 2016 9:37 am. 2- The IDF refactoring job will neither make any difference nor solve the issue here presented - mainly because the sketch presented as example is pure IDF API, not RMT Arduino API. FreeRTOS is an open source RTOS (real-time operating system) kernel that is integrated into ESP-IDF as a component. Hello community, I made a. I also used portTICK_RATE_MS but the speed didnt change . 3)? ¶ In ESP-IDF v3. 9 posts. 1. For example, the speed of a timer in an ESP32, which is running at a clock frequency of 80MHz, will be 80MHz or 8000000MHz for a set prescaler value of 1 and will be 1MHz or 1000000Hz for a prescaler value of 80. ESP-IDF ESP-BOX ESP-ADF ESP-MDF ESP-WHO ESP. The FreeRTOS kernel is ported to all architectures (i. Merged Copy link Contributor Author. For this, we’ll use the timer’s. After much struggling I found that vTaskSuspendAll (); and xTaskResumeAll (); works but only as long as no delays are used. 4 posts • Page 1 of 1. h library that controls SPI peripherals of ESP32 when they act as a masters. Top. Original example request there is for GET request only, so I need to change REQUEST type there and it was also required to add there some HTTP headers such as encoding of datas that is required for that type of request. g. The ESP32 Wi-Fi programming model is depicted as follows: Wi-Fi Programming Model. Therefor I set an interrupt on the according pin. Overview. ESP32 ESP-IDF BME280 Web Server Overview. ESP_Sprite, to me, "the company gang" is a term of respect. 9 posts. After successful setup the timer will automatically start. System time can be kept by using either one or both of the hardware timers depending on the application’s purpose and accuracy requirements for system time. [中文] Introduction ¶ The ESP32 chip contains two hardware timer groups. This function will return timer structure if configuration is successful. When the operation is complete, the callback function will be called with ESP_HIDD_OPEN_EVT. 11 protocol. Note that this is busy-waiting, so. 9 posts. In deep sleep mode, CPUs, most of the RAM, and all the. Struct esp_idf_hal :: delay :: FreeRtos. How can I add delay in microseconds? Also it seems that core 1 task is executed rarely. , Xtensa and RISC-V) available of ESP chips. If 0 is passed as the argument, the delay will equal the time spent executing the interrupt service routine. The ESP32 chip contains two hardware timer groups. ST7789とのSPI通信プログラムを実装していて、初期化関数の中でコマンド送信後delay ()でちょっとだけ時間調整をしている部分があった。. I also used portTICK_RATE_MS but the speed didnt change . Then I take the difference of two and I know how long the task took to execute. Turned out that vTaskDelay (2/portTICK_PERIOD_MS) wasn't waiting long. What I don't understand is how to wait 20 microseconds directly before the first stop condition. If it is used for a timer interrupt, the delay can extend till the execution of the interrupt service routine is finished. The spi_flash component contains API functions related to reading, writing, erasing, memory mapping for data in the external flash. Hello, I am trying to provide delay between the RGB colors of an led. the time param is of type "timeval", which is a struct that has two members that you set: "tv_sec" and "tv_usec". ticks_diff ( time . Board index English Forum Discussion Forum ESP-IDF; esp_timer_get_time() function performance. ESP IDF allows you to create the transaction & then reuse. source. In this ESP32 PWM tutorial with ESP-IDF, we will learn how to generate PWM or pulse width modulation module with ESP32 using ESP-IDF. MDK implements its own flashing utility esputil, which is developed in a separate repo. The first pulse duration can not be zero, and it has to be at least one. These pin functions can be used when in deep sleep, when the Ultra Low Power co-processor is running, or when analog functions such as ADC/DAC/etc are in use. Also what I find strange is that the original example from pcbreflux works without having to set an extra delay in deep sleep wake stubthat was also my first guess, but it turns out that it just takes 200 nanoseconds to toggle the output high and low again. In particular the following timer’s parameters may be set: Divider: How quickly the timer’s counter is “ticking”. See the full code below. Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly. Note that this is busy-waiting – it does not allow other tasks to run, it just burns CPU cycles. Board index English Forum Discussion Forum ESP-IDF; Need API support to provide micro seconds delay. Step 1: Create a new project. A tick is what you configure it to be. , reducing overall power consumption. Post by HelWeb » Wed May 01, 2019 4:32 pm . # include <btAudio. A positive number or. Then use Eclipse to program using the IDF. For delays longer than a few thousand. h" nor they have separate header files in. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. Timer callbacks are dispatched from a high-priority esp_timer task. This function will return timer structure if configuration is successful. That is also how esp-idf's own usleep() works. The ESP32 has two cores, with 32 interrupts each. For ESP-IDF v5. The ESP32 has two cores, with 32 interrupts each. esp_timer set of APIs provides one-shot and periodic timers,. The LSBs of the 64-bit system tick count will be padded with 0 if the system does not support microsecond resolution. Doing an "f1 += f2" 100 times takes only 64 microseconds, 640 nanoseconds per addition. esp_timer set of APIs provides one-shot and periodic timers, microsecond time resolution, and 64-bit range. Postby fly135 » Fri Oct 05, 2018 5:10 pm. In light sleep mode, digital peripherals, most of the RAM, and CPUs are clock-gated, and supply voltage is reduced. For example, if GPIOA is connected to CPU0, and the dedicated GPIO instruction is issued from CPU1, then it’s impossible to control GPIOA. Dimming an LED may be done with PWM - not so with a. enthusiastsr November 18, 2021, 9:47am 1. 13 posts 1; 2; Next; Ritesh Posts: 1325 Joined: Tue Sep 06, 2016 9:37 am. I dont get any delay even if I add some different delays. Esp32 packet monitor. Post by filo_gr » Thu Sep 09, 2021 6:57 am . ) Using esp_timer_get_time () generates “wall clock” timestamps with microsecond precision, but has moderate overhead each time the timing functions are called. For delays longer than a few thousand microseconds, you should. lets call it C hz. I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. Board index English Forum Discussion Forum ESP-IDF; Need API support to provide micro seconds delay. Okay what you said is correct. ESP32 supports two major power saving modes: Light-sleep and Deep-sleep. This document describes using ESP-IDF with the ESP32 SoC. Projects Discussion and Showcase Device Hacking. delay does not block on esp32!I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. Sometimes it delays for exactly 2 seconds but sometimes it misses 10ms. The High Resolution Timer (ESP Timer) provided by FreeRTOS uses a 64 bit hardware timer. The only functions that change uxSchedulerSuspended are vTaskSuspendAll () and xTaskResumeAll (). execute EPROM. Overview. Step 1: Create a new project. void esp_rom_install_channel_putc (int. I call vTaskDelay for various reasons. Optimizing execution speed is a key element of software performance. Specify the project name and directory. The most relevant examples that deal with logging are the. Note that this API returns a 64-bit time stamp in microseconds, so if converting to 32-bit timer in milliseconds you need to divide the result by 1000 first. You should use it if you are using arduino, and also you should post in the arduino forum. To create a timer, call esp_timer_create (). Also only the RTC GPIO pins (GPIO0 - GPIO5) can be used for deep sleep external wakeup. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. Code that executes faster can also have other positive effects, e. So I measured delay between input signal (on the pin 4) and ISR processing point (pin 18) by an oscilloscope and I see the delay between an input event and output event is 4 microseconds!!!! It's unbelivieble too long!!!Get time in uS since powerup int64_t esp_timer_get_time() esp_timer_get_time() returns 64-bit time since startup, in microseconds. in order to get a microseconds’ delay for another try. py monitor. It allows to set this: 1, 2 or 3 level (by default 1). esp_err_t esp_timer_stop (esp_timer_handle_t timer) ¶ Stop the timer. I would like to toggle an output pin in the order of microseconds so use the function delayMicroseconds. 42 +/- 0. August 15, 2022. This method is set to be called every ~5sec as a software WDT, you should move EVERYTHING out of this method and have a background task that is woken up by this method. In this guide, we will show you how to use FreeRTOS timers and delays using ESP32 and ESP-IDF. Initialization of two GPIOs as output signals within selected unit by calling mcpwm_gpio_init(). Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. 4. Answers checklist. sleep_us(us): This is yet another blocking method that provides a delay in microseconds. event_base – [in] the event base that identifies the event. 13 posts 1; 2; Next; Ritesh Posts: 1327 Joined: Tue Sep 06, 2016 9:37 am. ESP32－delay関数（時間調整について）. espnow – ESP-NOW Module; espulp – ESP Ultra Low Power Processor Module; floppyio – Read flux transition information into the buffer. Optimizing execution speed is a key element of software performance. I guess the system timer runs with a resolution of 1 ms. h","path. The timer_u32() is an alternative for the esp_timer_get_time() function as described in Epressif Documentation. h. Release v5. ESP-IDF ESP-BOX ESP-ADF ESP-MDF ESP-WHO ESP-SkaiNet ESP32 Arduino IDEs for ESP-IDF ESP-AT ESP IoT Solution ESP RainMaker Rust ESP8266 Report Bugs Showcase; Chinese Forum 中文社区 活动区 乐鑫活动专区 讨论区 ESP-IDF 中文讨论版 《ESP32-C3 物联网工程开发实战》书籍讨论版 ESP-AT 中文讨论版 ESP-BOX 中文. 9 posts. Board index English Forum Discussion Forum ESP-IDF; Need API support to provide micro seconds delay. ESP_igrr wrote:esp_timer_get_time returns 64-bit time since startup, in microseconds. For ESP-IDF target, we have chosen ESP32 module. Posts an event to the system default event loop. This is the better option when executing multiple tasks, which is usually the case in FreeRTOS. TimTapMan August 2, 2022, 7:42pm 1. microseconds micros : 10814 HPtimer = 10814 --> 10000 calls of micros() on core 1 (500µs longer) but value measured by the two functions give the same result microseconds micros core0 : 10835 microseconds HighPrecTimer: 10216 microseconds HighPrecTimer core0: 10504 microseconds micros : 10795 HPtimer = 10795. I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. hth, gl esp_timer set of APIs provides one-shot and periodic timer s, microsecond time resolution, and 64-bit range. ESP-IDF FreeRTOS is based on the Xtensa port of FreeRTOS v10. Post by jhinkle » Sat Dec 08, 2018 5:00 pm . esp_timer set of APIs provides one-shot and periodic timers, microsecond time resolution, and 64-bit range. IDF documentation suggests microsecond delay - should be millisec Postby jhinkle » Sat Dec 08, 2018 5:00 pm In section "API Guide - Wi-Fi Driver" -- in sub-section. So in that module, we need exact delay of 10 and 40 microseconds of delay interval in some interval to update firmware into that module using one wire communication over GPIO pins. If your application code does not call vTaskSuspendAll () directly,. I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. Reiner1210 Posts: 39 Joined: Tue Mar 20, 2018 6:28 pm. 0000041666666666667 ms by X to get your time delay or you can use pdMS_TO_TICKS ( X ) which will do it for you. I was able to get the current date and time by polling NTP servers and using struct tm and getLocalTime() function. This function can help install the low level putc function for esp_rom. period: timer period, in microseconds . Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly. sleep_us ( 10 ) # sleep for 10 microseconds start = time . Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. Use this function if an RTC IO needs to be disconnected from internal circuits in deep sleep, to minimize leakage current. Re:. This depends on the setting of divider, that will be used as divisor of the incoming 80 MHz APB_CLK clock. In deep sleep mode, CPUs, most of the RAM, and all the. The timer speed can be determined by the following formula-. us – Number of microseconds to pause . Under the hood, the esp_timer. Hi, I'm following the sntp example to get the unix timestamp but. When ı create a task using xTaskCreate() function and adding some delay in the task function. 0, register access macros which write or read-modify-write the register can no longer be used as expressions, and can only be used as statements. The ESP32 SoCs contains from 2 to 4 hardware timers. Hello World, I am trying to control a servo using the ESP32_Servo Library on my ESP32 S2 Board. vTaskDelay issue bit me. esp_timer set of APIs provides one-shot and periodic timer s, microsecond time resolution, and 64-bit range. g. I2S (Inter-IC Sound) is a serial, synchronous communication protocol that is usually used for transmitting audio data between two digital audio devices. This could change in future Arduino releases. The exact hardware timer implementation used depends on the target, where LAC timer is used for ESP32. This is the documentation for Espressif IoT Development Framework ( esp-idf ). Modem-sleep mode works in Station-only mode and the station must connect to the AP first. 4. I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. Currently, this requires building the cross-compiler toolchain from scratch. That will be streams of those logical high signals to control an Infra-red LED. You can google them to see how they work. h> ets_delay_us(10); //Stalls execution for #uS Exact delays Jan 3, 2021. Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly. 2. I agree that it will work for microseconds. Please note that ESP AP and ESP-NOW share the same encryption hardware keys, so the max_connection parameter will be affected by the :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`. esp_timer set of APIs provides one-shot and periodic timers, microsecond time resolution, and 64-bit range. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. Dimming Neopixels, Delays<Microseconds. There are two units available on-board of ESP32 and enumerated in mcpwm_unit_t. The ESP8266 appears to be SOL as the Arduino core uses the nonos-sdk, not the esp-idf. Timer Operations and Events Update Period . Post by filo_gr » Thu Sep 09, 2021 6:57 am . Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. Joined: Wed Aug 29, 2018 3:17 pm. ESP32－delay関数（時間調整について）. Tested making a call and saving values. I. This guide also includes a comparison of vTaskDelay () function provided by FreeRTOS with. Timer callbacks can be dispatched by two methods: As you can see from the logs, the time keeps deviating. 240,000,000 / 1,000,000 for a 240 Mhz processor, i. Internally, esp_timer uses a 52-bit hardware timer. A delay of "a few microseconds" on a 20-microsecond pulse is different from the original request of. Timer callbacks can be dispatched by two methods:As you can see from the logs, the time keeps deviating. 1. Besides, running a timer every few tens of microseconds leaves nearly no time for the system to do other things. Heap Memory Debugging. The choice depends on the application purpose and accuracy requirements for system time. void esp_rom_install_channel_putc (int channel, void (* putc) (char c)) esp_rom_printf can print message to different channels simultaneously. So, Normal communication with that module using ESP32 is UART but. {"payload":{"allShortcutsEnabled":false,"fileTree":{"components/newlib":{"items":[{"name":"platform_include","path":"components/newlib/platform_include","contentType. This discussion on sub-microsecond ESP timing seems well worth reading FYI. Unless it is a linear and very simple program , do not use this. void esp_rom_delay_us (uint32_t us) Pauses execution for us microseconds. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. Returns. Introduction. Post by filo_gr » Thu Sep 09, 2021 6:57 am . So, I note that the vTaskDelay in the arduino does a delay of 15ms because of the Watchdog timer, this is the piece of code that says it. ESP-IDF ESP-BOX ESP-ADF ESP-MDF ESP-WHO ESP-SkaiNet ESP32 Arduino IDEs for ESP-IDF ESP-AT ESP IoT Solution ESP. In this phase, a command (0-16 bit) is clocked out. The following line always rounds down, resulting in a much shorter delay: The delay has to be configurable to sub microsecond resolution. The ROM function ets_delay_us() (defined in rom/ets_sys. // This code is for testing analogRead delay // Compiled using Arduino IDE // ESP32-WROOM-DA Module // Board is ESP WROOM 32 made by // Does nothing more than fire a periodic timer // interrupt every 200 microseconds and an analogRead // inside the ISR: PinTEST is high before read, // then is low. Delay a task for a given number of ticks. Returns nothing. We will look at how to produce the PWM signals with LEDC hardware of ESP32 and attach those signals to any of the GPIO pins. Internally, esp_timer uses a 64-bit hardware timer. It should be something you could tweak for the desired result -- if you have a way. Top. Timer has a callback function associated with it. Inside this timer ISR you would reset/disable the timer, then process your delayed action and return. The API is slightly different than that for the ESP32. A delay of "a few microseconds" on a 20-microsecond pulse is different from the original request of "introduce 20us of delay to input pulse". Please note that ESP AP and ESP-NOW share the same encryption hardware keys, so the max_connection parameter will be affected by the :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`. Before ESP-IDF V3. For ESP-IDF target, we have chosen ESP32 module. This function can help install the low level putc function for esp_rom. Now click ‘ Create project using template sntp . When ı create a task using xTaskCreate() function and adding some delay in the task function. ESP Wi-Fi supports up to {IDF_TARGET_MAX_CONN_STA_NUM} (``ESP_WIFI_MAX_CONN_NUM``) Wi-Fi connections. However, the code doesn't work and I don't think the servo is getting any PWM signal. Pauses the program for the amount of time (in microseconds) specified by the parameter.