In essence a one. After invoking the idle hooks, the idle task puts the CPU into "wait for interrupt state" ("waiti", similar to "wfi" in ARM CPUs). The task that lights up the LED connected to GPIO10 has a priority of 1. Hello everyone, I'm transferring a project from the arduino to the ESP32, is there a command to insert the delayMicroseconds function as in the arduino?Do not worry about using delay in the tasks unless needed. Right now I see on the monitor that the loop in the vTask_Manage_STA_Connection runs a single time. It’s scheduled to run after 120 milliseconds when run the first time. In my test applications that don't use any sockets, this task literally only calls std::this_thread::yield () over and over. begin(112500); delay(1000); Then, we will create the tasks, with a call to the xTaskCreate function. ems912 February 8, 2023, 12:46am 1. The best resource to get started from what I've found is the esp-rs book. ryancasler: FreeRTOS events will then run on core 0 instead of core 1. Go to Tools > Board and select ESP32 Dev Module. It may shed some light on the reason why Task1 is stopped. CMake is an open-source, cross-platform family of tools designed to build, test and package software. ESP32 多工 (Multi-Task)處理同步事件~millis指令~，不用delay避免程式卡住. In the setup function I start 2 separated tasks. Code that executes faster can also have other positive effects, e. I added longer delays and finally changed to using a task delay to get the ledc updates to work again. (esp_task_wdt_add (NULL); esp_task_wdt_reset ();) instead of delay (x. TaskScheduler. They never yield the processor. These tasks are waiting for the key and the low priority task has chance to hold the key then it will block the high priority task and continue executing. Task delay becomes critical; Lower task priority becomes critical; I'd like to avoid to disable the WDT; Interrupt on the button pin to wake up the task could be an option, however I want to avoid interrups and I want to use polling; Is it possible that I can't polling a pin? On all microcontrollers (without FreeRTOS) I think it is easy to. Espressif ESP32 Official Forum. The TWDT is responsible for detecting instances of tasks running without yielding for a prolonged period. The payload can be a buffer which the original task allocated at disposal of the transmitter. ESP_Angus Posts: 2344According to FreeRTOS there is no easy way to calculate the memory requirements of a task. In the MRE below, the Consumer Task has a higher priority than the Producer Task. Task1 runnning on core 0 collects data from various GPIO (ADC, Digital and PWM) and generate 2 char arrays that i need to send to the queue. We create 2 tasks: task1 has priority is 1, task2 has priority is 4. Re: xTaskCreatePinnedToCore doesn't work for Core 1. 2. If you just want to turn the WiFi off. FreeRTOS Demo_1. 1 Sync Time with NTP Service from a server and set the local clock in the ESP32 (this is well documented and working) 2 Read current usecond till next sec, register a Timer#1 to Trigger when the second arrives. It's a bit different from a real Arduino where there's nothing else going on. Yes, I see now that you can change the tick rate. h" #include "nvs_flash. So, it means that the task will be blocked during the delay time [5] and the scheduler can attribute the CPU to other free task. That is shown in two different ways, 1. Esp freezes after 12 hours or 24 hours. How to delay microseconds on ESP32 under a Free RTOS task PlatformIO Core andyfraser September 8, 2022, 10:24am 1 I have some code running as a. Serial. Maybe you could use vTaskDelayUntil () to get you close. Description. h" #include "freertos/event_groups. , reducing overall power consumption. The next task in this project is to read the temperature that is going to be used to control the damper. Arduino Wiring-based Framework for the Espressif ESP32, ESP32-S and ESP32-C series of SoCs. This. Manage FreeRTOS tasks - Suspend, Delay, Resume, Delete. Thus the turn off delay is a multiple (n>=2) of those period times and actual turning off takes place approx [(n-1). After calling it, FreeRTOS knows that the task is finished and should not be rescheduled. After that, we will get the priority of the setup function. I have ventured beyond my ability in this one. You're 95% of the way there. INCLUDE_vTaskDelay must be defined as 1 for this function to be available. Hi, The thing with uS delays under software control is you need to clearly understanding you're tolerances. h" #include "apps. Next, initialize the NTP client to get date and time from an NTP server. ESP32-C3 RISC-V MCU w/ DSP; Arm Corstone-3xx on Arm Cortex-M MCU; Licensing; Security. 追記：プログラム解説 setup内I usually create a lowest priority FreeRTOS task that just loops and calls the feed method with a delay less then the timeout, giving enough time for higher priority "business logic" to run. Follow the next instructions to create a new project on Firebase. Adding a priority 0 task (which indicates when CPU is in IDLE, delay / etc), we can start playing. Hi everyone. ESP32 supports three types of locks described in the table below. As long as each Device is accessed by only one task, the driver is thread-safe. begin (115200); // Set up Core 0 task handler. And, I am trying to create a webserver with 3 submit push buttons. Declare a variable of type SemaphoreHandle_t to store the values of semaphore. ArduinoIDE. They are typically used as FIFOs (First In First Out) [1], meaning that. Code that executes faster can also have other positive effects, e. I have testet this in two different wifi environments/networks using wireshark (see below) The graph shows time between consecutive UDP packets (with encapsulated RTP packets). CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH. The ROM function ets_delay_us() (defined in rom/ets_sys. g. c and Task. When there are multiple. Watchdog timers are intended to catch when the software has gone into an infinite loop or. xTaskNotify () is used to send an event directly to and potentially unblock an RTOS task, and optionally update one of the receiving task’s notification values in one of the following ways: Write a 32-bit number to the notification value. Just a note, calling delay() in any webserver callback blocks the AsyncTcp thread, which is bad. Then it has to go in an infinite loop to control a motor position. ” The third argument specifies the stack size of the task. Q&A for work. 15s to 0. Note that this is busy-waiting, so unlike vTaskDelay it does not allow other tasks to run (it just burns CPU cycles. 2. abort() was called at PC 0x400d9a7f on core 0 Backtrace: 0x4008c7e0:0x3ffbe160 0x4008ca11:0x3ffbe180. While millis() is an absolute time clock. You need to make sure it's already there. I want to try the inits in a loop, with a short delay between attempts, and I want the watchdog to reset the ESP after say 5 seconds. 0/v1. Using delay on a ESP32 whiles using freeRTOS is a waste of CPU time. Multitasking with asyncio. Multiply 0. h" #include "esp_wifi. When ı create a task using xTaskCreate() function and adding some delay in the task function. This guide also includes a comparison of vTaskDelay () function provided by FreeRTOS with different delay values in milliseconds. The esp32 is placed close to the AP. 3V ESP32-D0WDQ6-V3(NRND) Dualcore v3. Every 1ms a timer interrupt fires and the scheduler jumps in and looks for the highest priority task that is able run. The value was 100. Please lend me a little more. The following optimizations will improve the execution of nearly all code - including boot times, throughput, latency, etc: Set CONFIG_ESPTOOLPY_FLASHFREQ to 80 MHz. Timer – bộ đếm thời gian, được sử dụng để đo và kiểm soát thời gian. vTaskDelay is no good for small mS delays. Not sure. /* pin task to core 0 */ delay(500); //create a task that will be executed in the Task2code() function, with priority 1 and executed on core 1 xTaskCreatePinnedToCore( Task2code, /* Task function. House cleaning tasks will be performed when there is no code in loop(), so no issue there. My device uses wifi, ble feature. count; //Dispose the task, keep the result Obviously the code works, so it must be turned into c++ at some point, but I dont know what that would look like. vTaskDelay is a non-blocking delay. However, improving execution speed may have trade-offs with other aspects of performance such as Minimizing Binary Size. An ESP32 Event Group is simply a collection of flag bits that can be set / reset. The only functions that change uxSchedulerSuspended are vTaskSuspendAll () and xTaskResumeAll (). When I use the delay() function with a length as low as 1 and as long as 250, delay() never returns. You signed in with another tab or window. The ESP32 is dual core; Arduino sketches run on core 1 by default; To use core 0 you need to create tasks; You can use the xTaskCreatePinnedToCore () function to pin a specific task to a specific core; Using this method you can run two different tasks independently and simultaneously using the two. Specify the project name and directory. The exact hardware timer implementation used will depend on the target, where LAC timer is used for ESP32. August 15, 2022. Hello. Postby mikemoy » Thu Jan 30, 2020 2:33 pm. - Currently, Arduino ESP32 FreeRTOS configuration use Prioritized Pre-emptive Scheduling with time slicing so we just make demo for this type of scheduling. At the time of writing, the. @krupis FreeRTOS delay accuracy can be affected by the FreeRTOS tick resolution, and the priority of the task executing the delay. slowly charged capacitor, or an external, One-Shot delay timer like a NE555. Gotta be something to do with that register you set, or the setcrystal thing or one of those libraries. Among the functions available to it, the following can be highlighted: Scheduled execution every x milliseconds and even microseconds. The following tasks did not reset the watchdog in time. Same thing, right after baud rate is set in void setup: rtc_wdt_protect_off (); rtc_wdt_disable (); This time, the GUI functions just like before (as if the watchdog timer/interrupt is not actually disabled). I also tried putting those two functions (or whatever they are called after. Despite many attempts. Your Chrono and Webserver tasks simply won't work the way you've written them. The tick rate you set using configTICK RATE HZ sets the resolution of time you can use with FreeRTOS API functions. Hi, I have to drive a stepper motor with my esp32, with a frequency that requires a delay below milliseconds (for example 100 microseconds). Otherwise, a task with a higher priority may preempt the task that calls. delayをtask定義の前に入れるか、削除で解決 タスク定義はできるだけ最後にした方がいいのかな。 マルチタスクの弊害が出てしまった。 今回でだいぶesp32のことを知れた。 おもしれぇやつだな、おめぇ. Reload to refresh your session. cpp. You can use a semaphore. 1. Cheers. What's the reason or how can I get shorter delay when the smallest delay which I can use using assembler "nop" command gives me 0. The NodeMCU ESP32 is based on the Xtensa 32-bit LX6 dual-core microprocessor that embeds the FreeRTOS OS. We will develop a simple application where we will use a counting semaphore as an execution barrier. Hầu hết các vi điều khiển hiện tại đều có bộ định thời sẵn. The concrete device is an ESP32-CAM and it is running at 80MHz at approx 25°C room temperature. Every once in a while it appears the vTaskDelete call ends up deleting or blocking the calling task as well. It lets other tasks on the ESP32 have a chance to run and won't resume the loop() task until the number of ms specified has gone by. Switch to “Standby” mode, when you are not executing any task, which will allow us to save energy. h" #include "esp_deep_sleep. Each interrupt has a fixed priority, most (but not all) interrupts are connected to the interrupt matrix. g. I have my doubts about that, but don't have a better explanation. h" #include "esp_event_loop. Using delay(1) was too long, as were other forms of 1ms delays. I also tried putting those two functions (or whatever they are called after. ESP32 Timer Interrupt Example – Blinking an LED. Since the esp32 core builds on freertos, you get: void delay (uint32_t ms) { vTaskDelay (ms / portTICK_PERIOD_MS); } and vTaskDelay is defined off in the depths of FreeRTOS somewhere (source for freertos is not included in the Arduino distribution, although it is. Internally, esp_timer uses a 64-bit hardware timer, where the implementation depends on the target. @Whandall perhaps you can help out making this ESP32 task example more indicative of what ESP32 can do. I want it to be 2 seconds regardless of how long the task took to execute. Code to send the device to sleep: unsigned int time_to_sleep_sec = 86400; esp_sleep_enable_timer_wakeup (1ULL * unsigned int time_to_sleep_sec * 1000 * 1000); esp_deep_sleep_start (); Instead of 86400 seconds, the device woke up after. These. 5us. h" #include "esp_log. 2. The code runs very fast until it casues a stack overflow and resets the esp. I tried RTU-master and RTU-slave example by slightly modifying them. getfreeheap (something similar to this in the Arduino core). ’. (there is no problem of core). Their task handle is saved in a shared data structure, which access controlled by a mutex semaphore. unless delay actually calls vTaskDelay on esp32, which it does. ESP-IDF uses FreeRTOS which is a real-time operating system. Unless it is a linear and very simple program , do not use this. It is based on the RTOS. Delay a task until a specified time. For ESP-IDF target, we have chosen ESP32 module. I've tried pinning the task to either core. e. 2 days ago · Hello guys. I have ensured that this is the only task with priority 1. • Priorities can range from 0 to N. println (taskCore); Now we will launch the FreeRTOS task, assigning it to a specific core of the ESP32. Without the delay’s the outcome is the same. This function takes exactly the same arguments of the xTaskCreate and an. The obvious next step is to create something like Microsoft's TPL (aka the Task Framework) library for the ESP32, perhaps using new C++ awaitable features assuming you can convince your ESP32 toolchain to use the latest C++ compiler. An alternative way to perform a task periodically is to count the time manually, and execute the right codes at the right moments. The best resource to get started from what I've found is the esp-rs book. If you put the ESP32 module to deep sleep, as per post#5, then WiFi is off. But the documentation for xTaskCreatePinnedToCore () states: "Tasks must be implemented to never return (i. Click ‘Choose Template’ button to proceed forward. Even if you delay in your own task for a sub millisecond period, it is absolutely possible for your task to have control taken away from it (in this example) for up to 5ms at a time. Tests using Task vs LeanTask. If you switch to ESP-IDF, you can enable these in your project. I am having trouble figuring out how to disable then re-enable (upon a triggering event) the hw (esp32-hal-timer) timer from the esp-arduino library, here for a stepper motor controller application with my esp32 development board. 1. ESP32-D0WDR2-V3 Dualcore v3. See the roundrobin. sendMessage (chat_id, "Someone is at the door. cpp 📋 Copy to clipboard ⇓ Download. A task may only be returned to the Ready state by an explicit call to vTaskResume() by another task. The first advantage we will discuss is accurate timing. taskFinished) { //busy } int result = task. . This example delays by 500ms: esp-idf-equivalent-to-arduino-delay. Running a number of times or forever. I also used portTICK_RATE_MS but the speed didnt change . So far I've managed. Sometimes it delays for exactly 2 seconds but sometimes it misses 10ms. Click ‘Choose Template’ button to proceed forward. You don't need this library for the ESP32 because FreeRTOS is already provided as a component of the ESP-IDF framework of. This leads to the second tangentially related problem. for (;;) { // read the input on analog pin 0: int sensorValue = analogRead (A0); // print out the value you read: Serial. xTaskCreate (uploadToAWS, // Function that should be called "Upload to AWS", // Name of the task (for debugging) 1000, // Stack size (bytes) NULL. 4 GHz Wi-Fi® band as well as Bluetooth® 5. delay(1); This will feed the watchdog timer without disabling it. 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. Hi, I´m using a vTaskDelay right now to suspend my task for a while, but not being able to unblock before time runs up is a problem. We have named our project ‘ESP32_TIMER_INTERRUPT. ESP-IDF is the official development framework for the ESP32, ESP32-S, ESP32-C, ESP32-H and ESP32-P Series SoCs. Board ESP32-WROVER-E Device Description DevKitC V4 Hardware Configuration pin_sclk = 18; pin_mosi = 23; pin_miso = 19; pin_dc = 21; Version v2. August 15, 2022. Hello, I'm trying to send a simple message every 70ms from an ESP32 device configured in softAP mode to move. ). Any ESP32 development board should work, so long as it’s supported in the Arduino IDE. startTask(); while(!task. The ROM function ets_delay_us() (defined in rom/ets_sys. delay () will stop every other code from execution. The first argument is the name of the function. When it returns. Now click ‘ Create project using template esp_timer . I would like to write my own function to create a delay in a FreeRTOS task,. 5. framework-espidf. System initialization of software services and FreeRTOS. 59 *C P=73. g. timeClient. Connect and share knowledge within a single location that is structured and easy to search. For a full example, refer to PlatformIO ESP-IDF ESP32 blink example. h" #include. 625º—so it needs 360º/5. One of the best things about Arduino is the ability to just block for a period with: delay (1000); // hang on a second, buddy. I want to try the inits in a loop, with a short delay between attempts, and I want the watchdog to reset the ESP after say 5 seconds. attachInterrupt(GPIOPin, ISR, Mode); This function accepts three arguments: GPIOPin – sets the GPIO pin as the interrupt pin, which tells ESP32 which pin to monitor. Delay () Postby WiFive » Sun Jul 09, 2017 3:04 am. c Yes, it's as bad. After a few attempts, I did not succeed in realizing this because each task requires a delay (x) with x >= 1ms for the FreeRTOS system. First of all, the timer should be initialized by calling the function timer_init() and passing a structure. Most Arduino sensor libraries use calls to delay() to wait for the reading to become available. If bot. –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. ESP32 SoC has two processor cores (three in fact, if you also count the ULP core). Step 2: If i put the Oled and NTP code in the main loop function, all is well. h BaseType_t xTaskDelayUntil( TickType_t *pxPreviousWakeTime, const TickType_t xTimeIncrement ); INCLUDE_xTaskDelayUntil must be defined as 1 for this function to be available. First, interrupt handlers need to be defined using the IRAM_ATTR attribute in order to ensure that they're already loaded into instruction memory (IRAM). I would like to toggle an output pin in the order of microseconds so use the function delayMicroseconds. The following tasks did not reset the watchdog in time : - IDLE (CPU 0 ) - IDLE (CPU 1 ) Tasks currently running: CPU 0: blinkLedTask CPU 1: ipc1 Task watchdog got. Now I can use different vTaskDelay in the app_main function. 這樣會造成其他需要同步偵測的. The ESP32 does not do multitasking the way Linux or Windows does. First of all, you don't want to delay the loop() ever. The following tasks did not reset the watchdog in time: E (17121869) task_wdt: - IDLE0 (CPU 0) E (17121869) task_wdt: Tasks currently running: E. INCLUDE_vTaskDelayUntil must be defined as 1 for this function to be available. This sounds like an XY problem. 5. To create a task, use the function xTaskCreate (). For one of my project, I need to implement one ESP32 as a Modbus master and another one as a Modbus slave. If xSemaphoreTake() is used, the actual file download of slows down, acts erratically, and very often doesn't complete, allowing enough time for the watchdog to kick in and reboot the device. In this example: I have 2 tasks on the same core1. Esp32 crashing using FreeRTOS tasks. Basically I just want to run a task a given hertz (for example 50 Hz). I have two tasks, one in each core. Best practice task watchdog timer implementation: ESP32 & SIM800. h BaseType_t xTaskDelayUntil( TickType_t *pxPreviousWakeTime, const TickType_t xTimeIncrement ); INCLUDE_xTaskDelayUntil must be defined as 1 for this function to be available. cpp. Add one (increment) the notification value. There will be 2 task, first task will run on core 0, communicating with sensors to collect data at 4000SPS, using SPI bus. The ROM function ets_delay_us() (defined in rom/ets_sys. SPI Master driver is a program that controls ESP32’s General Purpose SPI (GP-SPI) peripheral(s) when it functions as a master. ESP32とArduinoIDEでキューを送りたい. In this tutorial we will see how to execute tasks on both cores. // ESP32 example. Dynamic tasks activation and deactivation. Steps to execute an interrupt in ESP32. The ESP32 has two cores, with 32 interrupts each. The next task in this project is to read the temperature that is going to be used to control the damper. Here is the actual circuit connected on a breadboard as per the circuit diagram. It Seems that when use Task1 on Core 0 That First line gets thrown to the end. task1 will print the strings "task1. Check this link for more details. More knowledgeable programmers usually avoid the use of delay () for timing of events longer than 10’s of milliseconds unless the Arduino sketch is very simple. I am new to ESP32 programming, coming from Arduino, and I am struggling with the task watchdog timer. The time is specified in RTOS tick periods. On the ESP32, this is the APB_CLK clock, clocked at 80 MHz. 6/cores/esp32/esp32-hal-misc. Each task runs until it needs to wait for something, or until it decides it. vTaskDelay(500 / portTICK_RATE_MS); You can use. ESP32; Teensy (tested on Teensy 3. esp32s3-box-examples - Various. task1 will print the strings "task1. The following are confirmed to be. Posted by rtel on December 24, 2014. h" #include "esp_attr. Postby abasel » Thu Jun 24, 2021 1:10 am. This means that the motor has a step angle of 5. ESP32 有個先進武器 - 雙核多工，現在有機會派上用場了。 用 xTaskCreatePinnedToCore() 建立一個獨立 Task，在 Task 跑無窮迴圈 delay(1) 1ms analogRead() 取樣一次，循環記錄 100 個點。 Since my task takes approximately 0. 1. Device Description. Which makes 'loopDelay' a stupid name 'SerialInterval' is more appropriate. To switch to a different SoC target, choose target from the dropdown in the upper left. Down at the very bottom you'll see two core task. vTaskList (): This function is used to read the task details (name, state, priority, num). Ble Advertising Start. h" #include "freertos/task. Optimizing execution speed is a key element of software performance. delayMicroseconds() calls it at least twice. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with ESP32. void vTaskDelayUntil (TickType_t *const pxPreviousWakeTime, const TickType_t xTimeIncrement) ¶. That means controlling 1 LED with two different delay times. print ("Starting to create task on core "); Serial. 例えばあるタスクが走ってて、そのタスクを終了検知したい場合にそのtaskHandleがNULLになってれば終了とみなすフラグに出来ると思ったが、vTaskDelete自体はtaskHandleの値を変更しないので、一度taskHandleが設定されると自前で消しに行かないといけないし、taskの. ESP32. 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. You signed out in another tab or window. lets call it C hz. Raising the level, the interrupt handler can reduce the timer processing delay. CMake is an open-source, cross-platform family of tools designed to build, test and package software. esp_task_wdt_init(WDT_TIMEOUT, true); // enable panic so ESP32 restarts esp_task_wdt_add(NULL); // add current thread to WDT watch And this in the loop() part:. The time is defined in tick periods so the constant portTICK_PERIOD_MS should be used to convert to real time if this is required. Check this link for more details. begin (112500); delay (1000); Serial. This means that the highest priority task that can run on a CPU will *always* be the task which runs on that CPU. Make sure that you are at version 1. 3 In the callback function of the Timer#1 start Timer #2 with the interval of 1 sec. When using USB CDC as the serial port, no combination of use or non-use of setDebugOutput and Serial. , reducing overall. The objective of this post is to give an introduction to FreeRTOS queues, using the ESP32 and the Arduino core. Task 2 will run on core 1, receiving data from first task and send it async over TCP. in. cpp 📋 Copy to clipboard ⇓ Download. The syntax looks like below. If you know that lower priority tasks will always be starved, by design, then it doesn't make much sense for the watchdog to panic about it. Internally, esp_timer uses a 64-bit hardware timer. See the RTOS Configuration documentation for more information. continuous loop). Two, we can run other tasks while the scan task is. Connect to Bluetooth Client (my phone) 3. The delay() call will allow all other tasks to. Click Get Started, and then Add project to create a new project. Hi, I have a question about the task priorities, which I didn't clearly understand. . 0. Note that this behavior is the expected since the implementation of the ESP32 for the Arduino delay uses the FreeRTOS vTaskDelay function, as can be seen here. Task. You can use a Queue. I have an issue when I try to run everything in a. ) Delay () Postby WiFive » Sun Jul 09, 2017 3:04 am. void loop() { delay(1000); } The task functions. 1. ESP32 SoC has two processor cores (three in fact, if you also count the ULP core). Certain things do go on while the delay () function is controlling the Atmega chip, however, because the delay function does not disable interrupts. It simply prints the string to the UART. I am getting confused at some places. . The ESP32-S3 has a dual-core microprocessor Xtensa® 32-bit LX7, and has support for the 2. This project is for an IoT demo to some students. 0/v3. #include <freertos/FreeRTOS. Um. This takes some work and code re-organization. esp_timer set of APIs provides one-shot and periodic timers, microsecond time resolution, and 52-bit range. Most Arduino sensor libraries use calls to delay() to wait for the reading to become available. lib_deps = feilipu/FreeRTOS @ 10. h) will allow you to busy-wait for a correct number of microseconds. Board. When Demo_Task finishes a particular job on a data, it gives out a flag (Semaphore) which is an integer and increases by 1. This function can be used by periodic tasks to ensure a constant execution frequency. Note: Suppose that we have 2 tasks: the low priority task and the high priority task. hatenablog. The definition is that one in esp32-hal-misc. It’s also one of the worst things. io Flash Frequency: xxxx Upload Speed: xxxx Hi! When I started to develop on a Arduino everything was singlethreaded, and I was in full control of the. As a computer programmer implementing logic, you don’t want your tasks to get delayed for any reason. Note: Suppose that we have 2 tasks: the low priority task and the high priority task. 0000041666666666667 ms by X to get your time delay or you can use pdMS_TO_TICKS ( X ) which will do it for you. The code is intended to do the following: Every 60 seconds, check to see if it's still connected to WiFi, and reconnect if not Every hour, pull data from the DHT22 and Post that to Thingspeak Reset the board Problem: Everything. One is to use the semaphore (s. The following are confirmed to be working: All lighting and lighting telegram messages. The Arduino Core for the ESP32 runs over the ESP-IDF (Espressif IoT Development Framework). that delay() should not be necessary , the xTaskNotifyTake() will suspend this task, I would set your priorities to be dissimilar 2,3,4, you might want to read about how the ESP32 implementation of the Scheduler can skip tasks with equivalent priorities round-robin-scheduling. In the main. * Note: on most Arduinos, there is already an LED on the board that. Timer callbacks can be dispatched by two methods: ESP_TIMER_TASK. Here is some example code. inoUse variables with both cores and tasks ESP32.