I'm using millis() in order to set one counter to 0. sleep (seconds): This blocking method provides a delay in seconds. ESP32 analog input, ADC Calibration, ESP32 ADC Arduino Example. INCLUDE_vTaskDelay must be defined as 1 for this function to be available. The two hardware timers are: RTC timer: This timer allows time keeping in various sleep modes, and can also persist time keeping across any resets (with the exception of power-on resets. esp_timer set of APIs provides one-shot and periodic timers, microsecond time resolution, and 64-bit range. Code: Select all. resolution select resolution for LEDC channel. Problem is, I cannot start them from outside before the time is over. Here “ Adafruit_NeoPixel. If you need multiple tasks to occur at the same time, you cannot use delay(). time. Let's say portTICK_PERIOD_MS. My only recourse was to place a non-blocking delay between SPIFFS. This is very different to using the function "delay()" where your code stops processing (except for interrupts) and does nothing useful for the duration of the delay period. – Usman Mehmood. ESP32 - LED - Blink Without Delay. Arduino: Using millis() Instead of. You could also do a loop within the loop to poll sensor data. THE TICK is a new Netflix show. Then we can likely propose a good way of solving your problem. At that point all waiting coros will resume. A simple while (1) like this : Code: Select all void led_fast() { ESP_LOGI (TAG, "LED FAST INITIATED" ); while ( 1) { gpio_set_level (LED, 0 ); vTaskDelay ( 500. Why do we need this ESP32_ISR_Servo library Features. Imagine you have a system with a mission-critical function controlling a robot arm or doing something much more important. The value to be filled in timer’s 16 bit register = FFFF – 4C4B= B3B4 H. It seems that your specific problem here is that Blynk. Put your own animated GIF files on the "espgfxGIF/data" folder. On the Espressif boards it lets. It turns the LED on and then makes note of the time. A tick is what you configure it to be. delay() would pause the entire code until the time is reached. The ESp32 is a multicore device by using delay(500);, you are bringing the ESP32 to a stop. delay(time in milliseconds); When you call delay(1000) your program stops on that line for 1 second. The timing of these timers depends upon the clock and varies from one board to the other. That's the whole reason of not using delay(). Sorted by: 8. This is possible by using ESPAsyncUDP library. vTaskDelayUntil is absolute in terms of the ticks set by scheduler and FreeRTOS Kernel. There's actually a few issues in how the usbcdc functions for the ESP32C3. Um. run() to a specific core on ESP32 using the built-in FreeRTOS library functions. In the following sketch i can speed up and speed down the ramp with delay ();. The exact hardware timer implementation used depends on the target, where LAC. IotWebConf. This seems to be working but the tcp send call frequently stalls for as much as 2ms when I call it. Browse 009 Esp32 Micropython Non Blocking Delays And Multi Threading buy items, services, and more in your neighborhood area. This is done by creating a noDealy object and setting the amount of time for the delay you want. This next sketch shows you how to write a non-blocking delay that allows the code to continue to run while waiting for the delay to expire. The definition is that one in esp32-hal-misc. 2 Pins 2. Is there. ) ie the send buffer size in bytes is the parameter value. We can use multiple delays sequentially in a loop. Given that flush() should only return if data is sent, I think that blocking when there is no CDC connection may be the right behavior. That software serial library is not compatible with the ESP32 - it is only compatible with AVR-based boards. 3000ms is enough). The time setting can be done manually through a network protocol or a battery backup. print("Attempting to connect to SSID: "); Serial. As long as the delay is "delaying" nothing else of the code can be executed. 625º = 64 steps in half-step mode. I'm using mqtt callback function 'esp_err_t mqtt_event_handler_cb (esp_mqtt_event_handle_t event)' in esp-idf 4. Symmetric memory (with some small. ESP32Time: Set and retrieve internal RTC time on ESP32 boards. This is very useful for debugging and monitoring. The actual time that the task remains blocked depends on the tick rate. Which means the freeRTOS task switcher will swap to another task during the delay, non-blocking. This have a side effect. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with ESP32. Learn: How to fade LED, How to fade-in and fade-out LED in a period without using delay(), how to program ESP32 step by step. ESP32 LED Blink without [delay] This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. You should copy it and use it here. non blocking API. ESPPerfectTime: SNTP library that provides more accurate time for ESP8266/ESP32. This means that the shaft (visible. Executive BUT the danger is that using delay() could cause an issue in the future when you want to expand what the program does and then find that the blocking nature of delay means a re-write. I would like to change this as to. and called it in an else clause added to that if statement, and discovered that the blocking delay is not this while loop. A fade can be operated in blocking or non-blocking mode, please check ledc_fade_mode_t for the difference between the two available fade modes. Share. The delay () ties up 100% of the processor. The Ticker library allows to very easily setup callback functions to run periodically, without having to worry about the lower level details of setting up a timer (you can check an example on how to setup timer. In fact, the number of cores doesn't really matter much as long as you're not running out of CPU cycles or violating the real-time deadlines of your animations. I would need to figure out in the most real time possible, when one of such devices is close enough to the ESP32, and I thought that RSSI is a good enough approximation. I want to add an ultrasonic sensor detector into a robot car which is controlled via android app by user. One of the first program that beginners run is to blink an LED. In the following sketch i can speed up and speed down the ramp with delay ();. I am using an ESP32-WROOM-32 Development Board (30 pin version) with Platformio (CLion version). One way would be to set up a FreeRTOS message queue which your while loop can scan. For this tutorial, let’s only focus on how to generate time delays in us and ms with high accuracy. SPI slave device (general purpose SPI controller). At the moment, you seem stuck with an approach where you have to fight the RTOS. In the task void fDoParticleDetector( void * parameter ), I have a 280us delay, not using delay(), millis() and delayMicroseconds(). As you can see in the datasheet (below image) there are some lines also. Unlike Bluetooth that is always on, BLE remains in sleep mode constantly except for when a connection is initiated. Is there a way to make our delays non-blocking? An example of how this can go wrong Let’s create an imaginary device to highlight this issue. 8. micros() and overflow. This serial communication is considered as a. Created by Espressif Systems, ESP32 is a low-cost, low-power system on a chip (SoC) series with Wi-Fi & dual-mode Bluetooth capabilities! The ESP32 family includes the chips ESP32-D0WDQ6 (and ESP32-D0WD), ESP32-D2WD, ESP32-S0WD, and the system in package (SiP) ESP32-PICO-D4. Arduino library to make use of the Millis funtion for non Blocking Delays. An embedded C++ library to control LEDs. Ideally, task 2 should send data while task 1 collecting latest one. Hi I would like to use esp_wifi_scan_start() in non-blocking mode; is there an API or register that allows to check if the scan has completed?. If it has, it toggles the LED on or off and makes note of the new time. The 28BYJ-48 Stepper Motor has a stride angle of 5. * (See previous examples for more details!)Bluetooth Low Energy, BLE for short, is a power-conserving variant of Bluetooth. Always use RTOS based delay function. The MicroPython script that follows configures ESP8266 as a TCP server. void loop () { callTask_1 (); // do something callTask_2 (); // do something else callTask_1 (); // check the. There are a number of practical driver design. Delay a task for a given number of ticks. It includes in-built antenna switches, RF balun, power amplifier, low. Definition. Every: Non-blocking replacements for delay(). The ESP32 Wi-Fi programming model is depicted as follows: Wi-Fi Programming Model. setInsecure(); while (status != WL_CONNECTED) { Serial. One way would be to set up a FreeRTOS message queue which your while loop can scan. Just like delay()there is a microsecond version called delayMicroseconds(), millis() has micros(). Get(); // Get the current delay. SPI Master driver is a program that controls ESP32’s General Purpose SPI (GP-SPI) peripheral(s) when it functions as a master. Hi, i am using the OneWire Library. uint16_t HC04::distance(){ digitalWrite(m_trigPin, LOW. configure MQTT callback in non blocking mode for esp32 using esp-idf 4. The code to use client just sets the post data and calls. 0 If connection establishment is in progress. It means that non-optimal wiring and/or a load capacitor on the bus will most likely lead to input delay values. freq select frequency of pwm. In this way the LED blinks continuously while the sketch. This non-being-blocked important feature is absolutely necessary for mission-critical tasks. Every example I see requires the use of millis () but I need an accurate, 100uSec, non-blocking ISR driven. The important thing to. I still don't know why this exists but its a pain. At its heart, there's a dual-core or single-core. The char datatype is a signed type, meaning that it encodes numbers from -128 to 127. !) BTW I'd be happy to submit a PR if there's an agreement on what it might. PinFlasher, a non-blocking flashing of an output pin. Configuring ESP8266/ESP32 as a TCP server using sockets. You could also unit the task with a pointer to a static variable that defines the delay time and use that instead of hard coding it. The previous sketch used a blocking delay, i. Otherwise, if your ESP32 sometimes connects to the Wifi network almost immediately and sometimes it doesn’t seem to connect at all, use this code instead to automatically reset the ESP32 if it doesn’t connect within 5 seconds: fix-esp32-not-connecting-to-the-wifi-network. Once freeRTOS is loaded, memory allocations need to be thread safe. Yes, vTaskDelay () is a non-blocking delay, so your lower priority function should be able to run while the higher priority function is in delay. The code above works without delay(). I'm still working on getting an ESP32 to RE-sync with an NTP-server when coming back from deepsleep. To set up an account on Cloud MQTT navigate to its official website ( and sign up using your email. ESP32 runs FreeRTOS with preemptive multi-threading. I tend to go for a non-blocking, delay()-less, millis()-based state machine approach right from the start, in all but the most trivial cases. run() blocks when there's no Internet connection:. However, I regard an interrupt handler that takes more than 5 μs as a sluggard, more than 10 μs. Symmetric memory (with some small. This means that the motor has a step angle of 5. I'm developing high frequency DAQ based on ESP32 and freeRTOS. Hi everybody, As discussed in this thread The RTC-time drifts away pretty fast when the ESP32 is in a sleep-mode. While in the Arduino, a PWM signal is set to 8 bit, in the ESP32, it can be whatever you choose, from 1 to 16 bits. Another benefit millis()is that it doesn't prevent us from running code while "waiting". I want it to port to a Non-Blocking code. skip. This is the better option when executing multiple tasks, which is usually the case in FreeRTOS. Subset of HTTP. c. The config portal will stay available after WiFi connection was made. Getting Date and Time from NTP Server. ; Measuring distance between 3 meters and 7 meters. Can ESP32 use the IP of the previous successful connection for communication after connecting to the router, and in case of failure, re-enter the authentication process and use DHCP to obtain a new IP? ¶To delay overall loop results in serial print monitor so I can keep track of / observe results easily. This is one of the most common peripherals used to connect sensors, EEPROMs, RTC, ADC, DAC, displays, OLED, and many other devices and microcontrollers. Device. I was able to get the current date and time by polling NTP servers and using struct tm and getLocalTime() function. I have the socket setup in non blocking mode with : err = fcntl (sock, F_SETFL , O_NONBLOCK ); and for good measure I do the send call with: err = send (sock, tempbuf, tempbuflen, MSG_DONTWAIT ); I time the. 10. A task runs until it says. Hello Guys! I just started a new Rest-server project on my ESP32-S2, but I'm facing some problems regarding the function "WiFi. This library enables you to use Interrupt from Hardware Timers on an ESP32-C3-based board. That is the firmware. {"payload":{"allShortcutsEnabled":false,"fileTree":{"libraries/WiFi/examples/WiFiScan":{"items":[{"name":". The lwIP Raw API is designed for single-threaded devices and is not supported in ESP-IDF. socket () Now we will assign the IP address and port of the ESP32 server to two variables, since we are going to need this information to contact the server. In FreeRTOS, there are a few ways to delay the execution of a function: vTaskDelay() allows us block the currently running task for a set amount of time (given in ticks). To see the result both ESP32 board should be connected to the PC via USB and a console should attached to the USB ports. This is the better option when executing multiple tasks, which is usually the case in FreeRTOS. The 28BYJ-48 Stepper Motor has a stride angle of 5. In this way the LED blinks continuously while the sketch. Recently, I had been using the Adafruit Feather ESP32 V2 with ToF sensors from Pololu, and surprisingly I got into the same problem that I encountered when I was using these sensors with the MKR ZERO back in June 2022 - see this post This time I was using the Classic SerialBT that comes with this ESP32 board. The ESP32 has two ADCs. The HX711 communicates with the microcontroller using two-wire interface (Clock and Data). There will be 2 task, first task will run on core 0, communicating with sensors to collect data at 4000SPS, using SPI bus. After searching on. micros() and overflow. everytime: A easy to use library for periodic code execution. 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. Set(new_delay_micros); // Set new delay interval and returns the old one. Interrupt based movement (movement without calling update() manually in a loop) is supported for the following Arduino architectures: avr, megaavr, sam, samd, esp8266, esp32, stm32, STM32F1 and apollo3. . Reifel but provides some. Consult the datasheet of your microcontroller if you’re using a non-AVR MCU. The FreeRTOS kernel is ported to all architectures (i. knightridar:That is the firmware. Join our thriving online community today!I've searched for the past 3 days on the internet for connecting to a WiFi network without blocking the code and after the connection is established, to connect to Firebase (also in a non-blocking fashion), but I can't make it work. The last step in this instructable. The Arduino millis () is a timer-based function that returns to you the time elapsed (in milliseconds) since the Arduino board was powered up. Beginner in Arduino and ESP-32 needs help. skip","path":"examples/CDC/cdc_multi/. I avoid the command delay() even in the smallest democodes and use a non-blocking-delay based on millis(). old=var. So, I've used this program for ESP32 to connect to WiFi network - #include <Arduino. void startTaskFunction(void *params) { //this is the function while ( true ) { xSemaphoreTake (StartSema,portMAX_DELAY); //which in order to start waits this Semaphore to be Given while ( true ) { //do some logic to controll a motor and keep it steady /////to stop this while. Hi, I am using UDP protocol to share the data over wifi. Then you can reset it whenever you need. Behind the scenes, the ezLED library employs the millis() function instead of delay to prevent blocking. 625°/64 in half-step mode. The Ticker library allows to very easily setup callback functions to run periodically, without having to worry about the lower level details of setting up a timer (you can check an example on how to setup timer. Here it is set to make a delay of 50ms: _delay_ms(50); The same library has a microsecond delay function as well: _delay_us(). Optional - an ESP32 e. . But it seems to be different when the. wifi scan in non-blocking mode. range is 1-14 bits (1-20 bits for ESP32). g. It is based on the FlexyStepper library by S. JLed got some coverage on Hackaday and someone did a video tutorial for JLed - Thanks! JLed in action. I have the socket setup in non blocking mode with : err = fcntl (sock, F_SETFL , O_NONBLOCK ); and for good measure I do the send call with: err = send (sock, tempbuf, tempbuflen, MSG_DONTWAIT ); I time. We can use multiple delays simultaneously and independent of each other. Post by ry1234 » Sat Feb 04, 2017 3:42 am . Therefor, I read a lot, especally about xSemaphoreGiveFromISR which seems to be the most efficiant way to deal with this problem. ). sleep (seconds): This blocking method provides a delay in seconds. The SPI controller peripheral external to ESP32 that initiates SPI transmissions over the bus, and acts as an SPI Master. You need an micro USB cable between PC and. do the other actions. These functions are generated with the Thing and added at the end of this sketch. Why not use the ESP32's OS, freeRTOS, vTaskDelay which is a non blocking delay? Also, freeRTOS has buffers that would handle such a. That coro will pause until all non-waiting coros have passed the barrier, and all waiting coros have reached it. Code: Select all. 625º = 64 steps in half-step mode. Multitasking on the ESP32 is non-preemptive. me-no-dev added the Type: Feature request Feature request for Arduino ESP32 label Feb 23, 2017 me-no-dev added a commit that referenced this issue Mar 3, 2017 Add Arduino SAM compatible analogReadResolution and Non-Blocking ADC api. This can be solved by using, in the main loop, a if statement and the millis () function that returns a time (not a clock time, but rather the time since the Arduino started). */ void vATask( void * pvParameters ) { /* Create the semaphore to guard a shared resource. Just like a hardware interrupt the timer interrupts are also the best way to run non-blocking functions at a certain interval. I thought setting ". Hi guys, I am having problems with my robot car project. ESP32Time: Set and retrieve internal RTC time on ESP32 boards. The previous sketch used a blocking delay, i. The only way to avoid that is to assign your code (or at least the part of it which is influenced by the brief delay) to the second core. I like this option the least although it's probably the simplest. We’ll discuss a couple of ways to achieve this. Wokwi Arduino and ESP32 Simulator. Your use of blink without delay is again blocking through the for (; loop non-blocking programming means there is only one loop. Most of the developers of esp12 or esp32 architectures either hard code the wifi credentials or use the famous WiFi manager [1]. The ESp32 is a multicore device by using delay(500);, you are bringing the ESP32 to a stop. SPI Master driver is a program that controls ESP32’s General Purpose SPI (GP-SPI) peripheral(s) when it functions as a master. Function. We have used GPIO12 to connect with DIR and GPIO14 to connect with STEP. You're 95% of the way there. Then search for Blynk in the search box and download and install the Blynk package for ESP32. You simply need to include the time. Hi there, straight to the point. Connect your DEV module to your Arduino IDE. Update 6th Jan 2021 – loopTimer class now part of the SafeString library (V3+) install it from Arduino Library manager or from its zip file. old=var. The wakeup from deep sleep is not a complete reboot of the CPU. Gotta be something to do with that register you set, or the setcrystal thing or one of those libraries. I am trying to create my own delay function but my sketch keeps crashing. But what if another function is blocking the loop() or setup(). A life saving, non blocking wifi configuration protocol. If the system succeeds in setting your socket non non-blocking, it will be non-blocking. Hi everyone, I want to use the HC-04 ultrasonic sensor in my project. cpp 📋 Copy to clipboard ⇓ Download. It turns the LED on and then makes note of the time. What I have managed so far is to get the actual time from an NTP-server on boot. This function. i want to call a function in the main loop: manual_delay_function (3000UL) // delay for 3 seconds. Knocking my head against a wall on this. here is a code snippet for a function to give a delay specified in seconds. All functions are non-blocking (without using delay() function) Easy to use with multiple LEDs. If you are using an Arduino with an ATmega328 (Uno, Ethernet) or an a. compare if currentMillis-pressMillis > 8000, if then shut the led. Problem is, I cannot start them from outside before the time is over. Get the on/off LED's states: LED_OFF, LED_ON. pdFALSE if xTicksToWait expired without the semaphore becoming available. Regarding “shorter than 500 μs” as an upper time limit for interrupt processing, “to prevent blocking the timer interrupt for too long”, you could go up to just under 1024 μs (eg 1020 μs) and millis() still would work, most of the time. It accepts a single integer (or number) argument. esp32ModbusRTU. This non-being-blocked important feature is absolutely necessary for mission-critical tasks. delayMicroseconds. Hardware Instruction. To overcome this, the following code implements a non-blocking approach by utilizing the ezLED library. * * This example also provides the firmware update option. If it is somewhere around twice the amount of a single tick, then it'll probably work. To deal with calls to blocking activities triggered from the GUI I normally create a second native thread which monitors a similar global message/event queue that LVGL can post non blocking requests toFor example, certain function is blocking while it's connecting to WiFi or some services. . สาธิตวิธีการใช้เซนเซอร์วัดระดับน้ำแบบไร้สัมผัส รุ่น XKC-Y25-PNP ร่วมกับ Arduino Nano หรือ ESP32 เพื่อวัดระดับน้ำแบบไม่ต้องติดตั้งให้สัมผัส. In fact, the number of cores doesn't really matter much as long as you're not running out of CPU cycles or violating the real-time deadlines of your animations. Reversing out this change causes the problem to go away for me. A WiFiManager alternative. It seems to me that the delay() function never works! I tried using the millis() as well and it doesn't work so well neither. If you use a delay (5) inside the ISR, you will be blocking the processor for at least 5ms, which for a computer is a lot of time. They work similar to hardware timers, but when multiple timers are going to run at the same moment they are executed in sequence instead of simultaneously. // This code is executed each "delay_in_microseconds". There are two main ways to use the timer, first as a Start-Stop-Reset timer. In vTaskDelayUntil you say the time at which you want to be woken. IotWebConf will start up in AP (access point) mode, and provide a config portal for entering WiFi connection and other user-settings. 3. Click the Debugger tab. Holds Now() for the next same period. The fact there is a library for it, and ESP8266 modules available, seem to. h library, download the library from. The delay. vTaskDelay is a non-blocking delay. delay () is blocking. 2. This function will return true if configuration is successful. delay(1000);} All reactions. Send it a message from another task to change the delay time. com. Step 1: Hardware. The elapsed time then is very unaccurate In general: no, gethostbyname *cannot* be non-blocking as it uses DNS to resolve a hostname, which involves sending UDP packets to a DNS server and waiting for a reply. Re: Non-blocking sockets, select () and transmit buffer size. SafeStringStream, a stream to provide test inputs for repeated testing of I/O sketches. The resolution of the PWM signal is also configurable. */ #include "thingProperties. However, be aware that micros() will overflow after approximately 70 minutes, compared to millis()'s 50 days. If not set. FIONBIO is an alternative way to set/clear non-blocking I/O status for a socket, equivalent to fcntl(fd, F_SETFL, O_NONBLOCK,. Arduino library to easily use on/off delays and cycle timers with non-blocking functions. You'll see blynkTimer Software is blocked while system is connecting to WiFi / Internet / Blynk, as well as by blocking task in loop(), using delay() function as an example. Thus, all ESP-IDF applications and many ESP-IDF components are written based on FreeRTOS. sock = socket. */ #include "thingProperties. h header file must be included in order to use the delay library function: #include <util/delay. ESP32 had a total of 4 hardware timers (Timer0, Timer1, Timer2, Timer3) which are all 64 bit based on 16-bit pre-scalers. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with ESP32. There are many examples of how to do this on the ESP32 in the Arduino IDE using FreeRTOS). 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. For including Adafruit_NeoPixel. Timing. Asynchronous HTTP for ESP8266 and ESP32. They're both "blocking". 2. The configuration is persisted in EEPROM. Non-blocking C/C++ library to manage blinking devices (for example, a LED) changing the state in ON-OFF time intervals. answered Mar 10, 2011 at 17:11. These targets have the following hardware features that make them SMP-capable: Two identical cores are known as CPU0 and CPU1. Hello together, I’m using the Pololu - VNH5019 Motor Driver Carrier to control a 12v motor with an ESP32. You just don't want to do all the stuff every loop. 3 In the callback function of the Timer#1 start Timer #2 with the interval of 1 sec. You switched accounts on another tab or window. lwIP non blocking call of recvfrom. Hi everybody, recently I wrote some testcode to test wireless communication with the ESP-NOW-protocol for ESP8266/ESP32 boards. mktime(t: struct_time) → int. Delay a task for a given number of ticks. This function initiates a non-blocking TLS/SSL connection with the specified host, but due to its non-blocking nature, it doesn’t wait for the connection to get established. Please note that the actual PCB layout design and excessive loads may increase the input delay. ESP32 Pin Layout (QFN 5*5, Top View) EspressifSystems 13 SubmitDocumentationFeedback ESP32SeriesDatasheetv4. Hi, I have several tasks in freeRTOS on my ESP32 delaying with the vTaskDelay-function. . is there a non-blocking type of library for this sensor out there (which works. However, we have to pay attentions when using this function:ESP32 with A4988 and stepper motor connection diagram. How to connect to a WiFi network with the ESP32 (Updated at 01/20/2023) The built-in WiFi. esp32h2","path":"libraries/WiFi/examples/WiFiScan. . A tick is what you configure it to be. A non blocking delay is a type of delay that allows other code to operate even though there is a delay operation elsewhere. PWM on ESP32 . muTimer. It keeps track of the elapsed time since the start of the delay or cycle and is non-blocking. h) will allow you to busy-wait for a. The program should wait until moving on to the next line of code when it encounters this function. I like this option the least although it's probably the simplest. At its heart, there's a dual-core or single-core. No blocking. e. The NoDelay library is used as a easy interface for using the built-in Mills function for keeping track of elapsed time and used for non blocking delays. The ROM function ets_delay_us() (defined in rom/ets_sys. For TCP, there is a non-standard IDF extension which allows you to call call setsockopt (TCP_SNDBUF) with an int-sized parameter which is the send buffer size as a multiple of the TCP_MSS value (rather than in bytes. And that's why it works on ESP8266 and not on ESP32 -- either adapt the Ticker library or rework your own code to not use member functions of classes. Which makes 'loopDelay' a stupid name 'SerialInterval' is more appropriate. Configuration entered in points 6 and 7 is shown on the following picture. Finally, decided there was some sort of race condition or priority of execution. e. print("Attempting to. EDIT: @HS2 raised that a better approach should be using a. Every: Non-blocking replacements for delay(). void ntDelay (byte t) { // non timer delay in seconds for (byte i = 0; i. begin(9600); // This delay gives the chance to wait for a Serial Monitor without blocking if none is found delay(1500); myservo. ESP8266EX and ESP32 are some of our products.