This guide also includes a comparison of vTaskDelay () function provided by FreeRTOS with different delay values in milliseconds. However, the code doesn't work and I don't think the servo is getting any PWM signal. The timer period is initialized by the mcpwm_timer_config_t::period_ticks parameter in mcpwm_timer_config_t. Code that executes faster can also have other positive effects, e. print output. Internally, esp_timer uses a 64-bit hardware timer. Raising the timer interrupt’s priority can reduce the timer processing delay caused by interrupt latency. 1. 3 IDE Name Arduino IDE Operating System. We will first look at the ESP-IDF structure. 9 posts. ’. Actually, we have connected one module over UART with ESP32 chip in our product. The spi_flash component contains API functions related to reading, writing, erasing, memory mapping for data in the external flash. Example: delay_microseconds (2000000) //waits for 2 seconds. You guys have always been the source of the "straight skinny" on what's going on in the idf and the ESP32. Post by filo_gr » Thu Sep 09, 2021 6:57 am . 2. For example, 1us = 1 / 1000000 of a second = 1MHZ clock rate. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. 1 post • Page 1 of 1. I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. 0. Top 1 post • Page 1 of 1 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 中文讨论版 It appears that simply using taskENTER_CRITICAL (); and taskEXIT_CRITICAL (); from the FreeRTOS docs does not work because of the way FreeRTOS is modified for ESP32. Numeric values in an array from a 8-bit 8kHz wave file. unless delay actually calls vTaskDelay on esp32, which it does. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. The constant portTICK_PERIOD_MS can be. To open the project in a new window, click ‘Yes. I think the issue might be that if the timer period is 250 microseconds, but you insert a log message into the handler, so the handler will take more than 250 microseconds to run. So, Normal communication with that module using ESP32 is UART but. Thus, there is no esp_wifi_get_tsf function, in fact there isn't even an esp_wifi. Because all the callbacks are dispatched from the same task, it is recommended to only do the minimal. py monitor. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. Ideally, 500ns or less. Because all the callbacks are dispatched from the same task, it is recommended to only do the minimal. The dummy phase. Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly. I dont get any delay even if I add some different delays. To switch to a different SoC target, choose target from the dropdown in the upper left. The CPU is executing at a constant processor clock rate. The actual time that the task remains blocked depends on the tick rate. ESP_igrr wrote:esp_timer_get_time returns 64-bit time since startup, in microseconds. g. Therefore, I am trying to implement ESP-IDF timer functions but only the first color appears. For that, you can use the following function: esp_sleep_get_ext1_wakeup_status() This function returns a number of base 2, with the GPIO number as an exponent: 2^ (GPIO). Post by guillermop ». ESP32 integrates two I2S controllers, referred to as I2S0 and I2S1, both of which can be used for streaming audio and video digital data. 4, 10 MHz and lower are available. h to include. 4 posts • Page 1 of 1. //function takes the following frequencies as valid values: // 240, 160, 80 <<< For all XTAL types // 40, 20, 10 <<< For 40MHz XTAL // 26, 13 <<< For. So your clock processor clock should be > 1 MHZ. It’s also one of the worst things. Because all the callbacks are dispatched from the same task, it is recommended to only do the minimal. Using Arduino Programming Questions. I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. Top. 1. It appears that simply using taskENTER_CRITICAL (); and taskEXIT_CRITICAL (); from the FreeRTOS docs does not work because of the way FreeRTOS is modified for ESP32. ticks_ms (), start ) # compute time differenceThis is vTaskDelay ( pdMS_TO_TICKS ( 10 ) ) a delay of 10mSec, this vTaskDelay ( 10 ) is a delay of 10 clock ticks. 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. By referring the ESP8266 guide, I am able to put the ESP32 in deepSleep mode. However, this crashes my ESP32 every time. HelWeb Posts: 36 Joined: Sat Mar 23, 2019 8:39 am. 0 and later versions, please refer to examples in the esp-protocols repo. py monitor. e. Parameters. The choice depends on the application purpose and accuracy requirements for system time. Then look at the hello world example and modify it blink an LED while still continuously printing the 'hello world' string. red. [ −] pub struct FreeRtos; FreeRTOS-based delay provider for delays larger than 10ms. I have ensured that this is the only task with priority 1. 13 posts 1; 2; Next; Ritesh Posts: 1325 Joined: Tue Sep 06, 2016 9:37 am. Optimizing execution speed is a key element of software performance. After that, you can use vTaskDelay (. The following line always rounds down, resulting in a much shorter delay: The delay has to be configurable to sub microsecond resolution. esp_timer set of APIs provides one-shot and periodic timers, microsecond time resolution, and 64-bit range. Additionally, there are some power-down options that can be configured to further reduce the power consumption. Description: micros() returns strange values when using arduino-esp32 as component of esp-idf, millis() returns values higher when using arduino-esp32 as component of esp-idf, then values using simply from Arduino IDEOverview. However, improving execution speed may have trade-offs with other aspects of performance such as Minimizing Binary Size. See Sleep Modes for these sleep modes and sub sleep modes. One is to wait for a period after resetting a chip (BME280). 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. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. Parameters. To address the Y2K38 issue, ESP-IDF uses a 64-bit signed integer to represent time_t starting from release v5. In the Extension, select ESP-IDF option: We will click the ‘ esp_timer ’ under the System tab. Board index English Forum Discussion Forum ESP-IDF; Delay booting. Hello community, I made a. I dont get any delay even if I add some different delays. Hardware: Board: ESP32 Dev Module Core Installation. ’ For the ESP-IDF board, we have chosen the custom board option. If ESP Timers prove problematic, then I like your assembler-delay idea. We have named our project ‘ESP32_TIMER_INTERRUPT. It is located at mid-low elevations in the southern Rocky Mountain Trench to the east, on the southern portion of. If this signal is set, pad latches current values of input enable, function, output enable, and other signals which come from the RTC mux. Parameters. 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. If a wakeup source is not configured already then the board remains in deep sleep mode until the external Reset button is pressed. Setting "Extra delay in deep sleep wake stub (in us)" option under "ESP32 specific" menu in menuconfig to some value like 500 (microseconds) did not work out. That means that it ticks at C times per second or, each clock tick is 1/C seconds. As we saw by the coding. Esputil is written in C, with no dependencies on python or anything else, working on Mac, Linux, and Windows as a static, singe no-dependencies executable. Inkplate esp-idf. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. I chose the ESP32 because of its 240MHz clock, but it still seems to be having trouble. vTaskDelay issue bit me. timer speed (Hz) = Timer clock speed (Mhz) / prescaler. get_idf idf. 00001 seconds, which will hardly affect your calculations. 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. Using "nop" command gives me 0. The sdk for the chip needed 2msec. The PCF8574 I2C expander is shown below. source ·. This example delays by 500ms: esp-idf-equivalent-to-arduino-delay. 0. When using a bootloader from these early ESP-IDF versions and building a new app, enable the config option CONFIG_APP_COMPATIBLE_PRE_V2_1_BOOTLOADERS. One of the best things about Arduino is the ability to just block for a period with: delay (1000); // hang on a second, buddy. 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. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. Board index English Forum Discussion Forum ESP-IDF; Need API support to provide micro seconds delay. get current time in millis() Post by Saskia » Fri Jul 21, 2017 9:58 am . This will include examples of logging, generating delays, keyboard input and blinking the onboard LED of ESP32. 9 posts. ESP_ERR_INVALID_STATE if the timer is not running . Set the GPIO interrupt type to low/high. Is there any limitation about max millis() counter? If millis() is used properly then no. The ROM function ets_delay_us() (defined in rom/ets_sys. After this time, the interrupt callback is executed. The new period will take effect based on how you set the mcpwm_timer_config_t::update_period_on_empty. ESPHome is a system to control your ESP8266/ESP32 by simple yet powerful configuration files and control them remotely through Home Automation systems. 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. 3)? ¶ In ESP-IDF v3. 2. 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 microseconds micros core0 : 10783 Delay in uS. This is the documentation for Espressif IoT Development Framework ( esp-idf ). Optimizing execution speed is a key element of software performance. [ −] pub struct FreeRtos; FreeRTOS-based delay provider for delays larger than 10ms. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. We have named our project ‘ESP32_GPIO_INTERRUPT. Description. Post by filo_gr » Thu Sep 09, 2021 6:57 am . Board index English Forum Discussion Forum ESP-IDF; Getting the uptime. 9 posts. One of the GPIO pin will be initialized and configured as. I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. Post by peterglen » Tue Oct 06, 2020 7:46 pm . That is also how esp-idf's own usleep() works. Description: micros() returns strange values when using arduino-esp32 as component of esp-idf, millis() returns values higher when using arduino-esp32 as component of esp-idf, then values using simply from Arduino IDE Overview. I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. This function can help install the low level putc function for esp_rom. Turned out that vTaskDelay (2/portTICK_PERIOD_MS) wasn't waiting long enough. h. The second ISR would be connected to the Timer. Need API support to provide micro seconds delay. I2S (Inter-IC Sound) is a serial, synchronous communication protocol that is usually used for transmitting audio data between two digital audio devices. Internally, esp_timer uses a 64-bit hardware timer. And the most important things that delay() will pause the execution of other codes. 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。. Furthermore, ESP-IDF provides different. Now click ‘ Create project using template esp_timer . Posts an event to the system default event loop. So I should I have sufficient time for the loopDelay to work, but it's not. 13 posts 1; 2; Next; Ritesh Posts: 1330 Joined: Tue Sep 06, 2016 9:37 am. It is same as millis() from view of usage. The timer can be started in one-shot mode or in periodic mode. Then return. THE TICK is a new Netflix show. I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. The Wi-Fi driver can be considered a black box that knows nothing about high-layer code, such as the TCP/IP stack, application task, and event task. Do you really want to block and spin for 9ms? I do. 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. Using esp_timer_get_time () generates “wall clock” timestamps with microsecond precision, but has moderate overhead each time the timing functions are called. I'm messing around with the following code: #define cyclespermicro 240 #define microcycles (n) (n*cyclespermicro) uint32_t startCounter, counter, cpu_cycles; int. Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly. This depends on the setting of divider, that will be used as divisor of the incoming 80 MHz APB_CLK clock. Board index English Forum Discussion Forum ESP-IDF; IDF documentation suggests microsecond delay - should be millisec. Therefor I set an interrupt on the according pin. Hello community, I made a. Force hold signal is enabled before going into deep sleep for pins which are used for EXT1 wakeup. h at the beginning of the file. For 2 sensors thats ~ 128 milliseconds. Unless it is a linear and very simple program , do not use this. 0. Whenever i compile the code for the esp32, the compiler generated the following error:ESP32-S3 GPIO interrupt latency is too high. I looked at the timers example and the timer does make it work and ESP32 can say something. The exact hardware timer implementation used depends on the target, where SYSTIMER is used for ESP32-C3. Multiply 0. This note explains various steps which happen before app_main function of an ESP-IDF application is called. 4. But there is problem with only microseconds return value by esp_timer. Timer callbacks can be dispatched by two methods: ESP_TIMER_TASK. Jan 3, 2021. In particular, for ESP32-WROVER module, call rtc_gpio_isolate (GPIO_NUM_12) before entering deep sleep, to reduce deep sleep current. #include <rom/ets_sys. Engineering Climate Datasets. この部分もESP-IDF側のAPIに切り替えるため、vTaskDelay ()関数を使ったのだが. This depends on the setting of divider, that will be used as divisor of the incoming 80 MHz APB_CLK clock. As soon as you need to do a few things at the same time, you. esp_timer provides one-shot and periodic timers, microsecond time resolution, and 64-bit range. The ROM function ets_delay_us() (defined in rom/ets_sys. This function can help install the low level putc function for esp_rom. When ı create a task using xTaskCreate() function and adding some delay in the task function. (which is the P after the 20 microsecond delay in the above diagram,) the idea is to attempt to read three bytes from the device in a loop until the three bytes can be read successfully. 9 posts. The High Resolution Timer (ESP Timer) provided by FreeRTOS uses a 64 bit hardware timer. Resolution timer_u32 uses 80 MHz clock (in most. A transaction on the SPI bus consists of five phases, any of which may be skipped: The command phase. The timer can be started in one-shot mode or in periodic mode. Delay a task until a specified time. ESP IDF allows you to create the transaction & then reuse. Re: Function for reading cycle count of CPU clock. When the operation is complete, the callback function will be called with ESP_HIDD_OPEN_EVT. In this phase, an address (0-64 bit) is clocked out. int64 = 292,471 years before overflow at uS resolution! Unlike gettimeofday function, values returned by esp_timer_get_time() start from zero after startup of the chip wakes up from deep sleep and do not have. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. void esp_rom_install_channel_putc (int. Overview ¶. Esp32 packet monitor. h) will allow you to busy-wait a specified number of uS. Added documentation regarding delay() resolution in esp-idf component #3014. (infrared of 905nm) with “digitalWrtie”, but I do not get pulses under 2 microseconds. in order to get a microseconds’ delay for another try. Click ‘Choose Template’ button to proceed forward. With a normal LEDs you can show the state of a system (blue= too cold, red= too hot). h library is based on hardware timers that can provide microsecond accuracy [1], which can easily be seen in the signature of the function that is used to setup a periodic callback. This does shave 10-20uS from each transaction. 1. The source files attached to this release will not work due to our use of git submodules. Additionally, there are some power-down options that can be configured to further reduce the power consumption. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. theskaz. Heap Memory Debugging. The ROM function ets_delay_us() (defined in rom/ets_sys. Board WEMOS LOLIN32 LITE Device Description just on breadboard. Modem-sleep mode works in Station-only mode and the station must connect to the AP first. 58acac8. esp_timer set of APIs provides one-shot and periodic timer s, microsecond time resolution, and 64-bit range. This callback function is called from the esp_timer task each time the timer elapses. So, Normal communication with that module using ESP32 is UART but. (station 1018621) in British Columbia, Canada. Code: Select. It doesn't harm the CPU, but keep in mind that FreeRTOS ticks are generated when CCOUNT matches CCOMPARE0. Note that this is busy-waiting, so. where "state" is a global variable. Board index English Forum Discussion Forum ESP-IDF; Need API support to provide micro seconds delay. With the ESP32 running at 240Mhz it is 0. Code: Select all. The delay function seems to be based on system ticks so that the delay time can be used for other tasks. Board index English Forum Discussion Forum ESP-IDF; Need API support to provide micro seconds delay. ticks_ms () # get millisecond counter delta = time . void esp_rom_delay_us (uint32_t us) ¶ Pauses execution for us microseconds. The LSBs of the 64-bit system tick count will be padded with 0 if the system does not support microsecond resolution. There are a thousand microseconds in a millisecond and a million microseconds in a second. ESP_Sprite. timer: timer handle created using esp. The constant portTICK_PERIOD_MS can be. One of the best things about Arduino is the ability to just block for a period with: delay (1000); // hang on a second, buddy. For demonstration of log functionality, check ESP-IDF’s examples directory. While millis() is an absolute time clock. You can google them to see how they work. The timer_u32() is an alternative for the esp_timer_get_time() function as described in Epressif Documentation. Board index English Forum Discussion Forum ESP-IDF; Need API support to provide micro seconds delay. The parameter in vTaskDelayUntil is the absolute time in ticks at which you want to be woken calculated as an increment from the time you were last woken. Actually, we have connected one module over UART with ESP32 chip in our product. Delay booting. To start the timer in one-shot mode, call esp_timer_start_once (), passing. Hello community, I made a. 0 have been backported. The address phase. Main Differences. The LED control (LEDC) peripheral is primarily designed to control the intensity of LEDs, although it can also be used to generate PWM signals for other purposes. Footnotes. When the GPIO mux is used, 2 APB clocks of input delay are added to the MISO, increase 2. Step 4: Connect the potentiometer to the ESP32. 1 Answer. That means that it ticks at C times per second or, each clock tick is 1/C seconds. Here's a neat hack to demonstrate how changing of clock frequency affects serial. kolban Posts: 1683 Joined: Mon Nov 16, 2015 4:43 pm. You guys have made an extremely impressive platform, to say the least. void esp_rom_delay_us (uint32_t us) Pauses execution for us microseconds. 9 posts. I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there. std::this_thread::sleep_for(std::chrono::microseconds(1000)); works, but any delay below 1000 us results in the same behavior as the yield call. [中文] Introduction ¶ The ESP32 chip contains two hardware timer groups. Joined: Wed Jul 28, 2021 12:25 pm Location: Italy [SOLVED] My function for microseconds delay doesn't work properly. Internal 8. I can imagine this takes a few cycles. Step 1: Create a new project. Hello! i am using an ESP32-WROOM-32U dev module to make a packet monitor. for (;;) { // read the input on analog pin 0: int sensorValue = analogRead (A0); // print out the value you read: Serial. Internally, esp_timer uses a 64-bit hardware timer. IDF documentation suggests microsecond delay - should be millisec. Sets how quickly the timer counter is “ticking”. Board index English Forum Discussion Forum ESP-IDF; IDF documentation suggests microsecond delay - should be millisec. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. The ESP32 has two cores, with 32 interrupts each. For example delayMicroseconds(2) takes 330 cycles, corresponding to a delay of more than 4µs, or double what was requested, when running at 80MHz to save power. Its not a great answer but I would suggest IDF and create your SPI transaction at startup. py monitor target uses the esp-idf-monitor tool to display serial output from Espressif SoCs. The CPU is executing at a constant processor clock rate. Hello community, I made a. 2. If you are interested in the low level details of the protocol. This could change in future Arduino releases. I. 0. Timer has a callback function associated with it. It is also possible to use the standard Unix gettimeofday () and utime () functions, although the overhead is slightly higher. Very simple, but functional solution for ESP8266 with IDF/RTOS and neopixel strip. 1) Bug with IDF functions that internally call vTaskSuspendAll () The assert in vTaskDelay () checks to see if the uxSchedulerSuspended of the current core is set. Now, generally, the analogRead() execution time on ESP32 is in the ballpark of 10 microseconds. 4. 240. June 30, 2022. int count_delay = 0; while (1). It is also possible. High Resolution Timer (ESP Timer) Internal and Unstable APIs. A delay of "a few microseconds" on a 20-microsecond pulse is different from the original request of. Specify the project name and directory. Overview. For a full example, refer to PlatformIO ESP-IDF ESP32 blink example. This discussion on sub-microsecond ESP timing seems well worth reading FYI. ESP32 supports two major power saving modes: Light-sleep and Deep-sleep. h) will allow you to busy-wait for a correct number of microseconds. I try to get the time which the esp32 has power in millis. py -p [PORT] flash idf. Actually, we have connected one module over UART with ESP32 chip in our product. According to the docs, the third parameter of timerAlarmWrite (timer, DELAY * 1000 * 1000, false) is a boolean that specifies whether the timer will. Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly. August 15, 2022. Click ‘Choose Template’ button to proceed forward. 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. The components directory holds all the 'C' code for the ESP32. Board index English Forum Discussion Forum ESP-IDF; Need API support to provide micro seconds delay. 1 Bootloaders built from very old versions of ESP-IDF (before ESP-IDF V2. Step 3: Connect the Power Pin. After much struggling I found that vTaskSuspendAll (); and xTaskResumeAll (); works but only as long as no delays are used. 0, the functionality is not limited to the “main” SPI. 5% of the province. In particular, for ESP32-WROVER module, call rtc_gpio_isolate (GPIO_NUM_12) before entering deep sleep, to reduce deep sleep current. 0. mbratch Posts: 271 Joined: Fri Jun 11, 2021 1:51 pm. Different from the API before IDF v4. source ·. Raising the level, the interrupt handler can reduce the timer processing delay. Type ESP-IDF: New Project in the search bar and press enter. The FreeRTOS tick frequency is set by default to 100Hz, meaning a tick will occur every 1ms. I encountered the following problem when using it: if I use a value such as delay_us(20) , it doesn't work! This function should be provided with a structure timer_config_t to define how timer should operate. Hello community, I made a. I am trying the run stepper motor with the tmc2208 driver and ı want to delay in microseconds like 5uS or 10 uS. Till Now, we have used ets_delay_us FreeRTOS API to get microseconds delay but that is not recommend to use. Board index English Forum Discussion Forum ESP-IDF; IDF documentation suggests microsecond delay - should be millisec. The ESP32 SoCs contains from 2 to 4 hardware timers. I encountered the following problem when using it: if I use a value such as delay_us(20), it doesn't work! Driving a pin (from high to low and vice. Board index English Forum Discussion Forum ESP-IDF; get current time in millis() 4 posts • Page 1 of 1. 1. Inkplate::delay();. ↩. Obtaining v5. println (sensorValue); vTaskDelay ( 1 ); // one tick delay (15ms) in. sleep_us(us): This is yet another blocking method that provides a delay in microseconds. Re: vTaskDelay() vS. 9 posts. See Sleep Modes for these sleep modes and sub sleep modes. Also only the RTC GPIO pins (GPIO0 - GPIO5) can be used for deep sleep external wakeup. 13 posts 1; 2; Next; Ritesh Posts: 1336 Joined: Tue Sep 06, 2016 9:37 am. ESP Wi-Fi supports up to {IDF_TARGET_MAX_CONN_STA_NUM} (``ESP_WIFI_MAX_CONN_NUM``) Wi-Fi connections. Board index English Forum Discussion Forum ESP-IDF [SOLVED] My function for microseconds delay doesn't work properly.