Esp32 configtime
Esp32 configtime. [中文] This document is intended to help you set up the software development environment for the hardware based on the ESP32 chip by Espressif. unsigned long MyTestTimer = 0; // variables MUST be of type unsigned long. SPI Master Driver. h>#include "time. The TWDT is responsible for detecting instances of tasks running without yielding for a prolonged period. h library and wondering where I can find simple clear documentation for the code below, including specifically a description of what these functions and parameters do: configTime (timezone * 3600, dst * 0, "pool. [中文] The SmartConfig TM is a provisioning technology developed by TI to connect a new Wi-Fi device to a Wi-Fi network. 👍 3. I am trying to sync my esp32 to NTP server using configTime (); my code looks like this: void startWiFi(){. The time. Additionally, the ESP32 comes with touch-sensitive pins that can be used to wake up the ESP32 from deep sleep, and built-in hall effect sensor. Stations connect to the ESP32. This library is compatible with all architectures so you should be able to use it on all the Arduino boards. void configTzTime(const char* tz, const char* server1, const char* server2, const char* server3); 3 days ago · How the Code Works. Copy the code given below in that file. Each pin can be used as a general-purpose I/O, or be connected to an internal peripheral signal. We will build and create a project in VS Code with ESP-IDF extension whereby a timer interrupt will be used to toggle the onboard LED of ESP32. So far I haven't been able to find the root cause. The server will use a client-server model to obtain the date and time with our ESP32 via the NTP server. Since some boards and SoC’s may vary in terms of hardware configuration, be sure you know all the board characteristics that you are 概述. This guide is a walkthrough of the Arduino IDE configuration menu for the ESP32 System on Chip (SoC’s). While ESP8266 has `TZ. As you can see, that function takes in three arguments, the gmtOffset, the daylightOffset and the ntpServer. There are many posts with similar code to connect to the NTP server all following the basic format, of connecting to the local wifi, calling configTime( ), then calling getLocalTime( &timeInfo ), to get the time in the timeInfo structure. For more details visit the supported chips documentation page. This function is called when IWDT enabled in menuconfig. Author: fbiego. Timer callbacks can be dispatched by two methods: -Using RTC memory to store deep sleep persistent variabele (esp32/buildin libary) Warning Avoid using the non working lwip based SNTP/DNS call's in combination of the W5500/Ethernet driver, a it is not integrated in LWIP. The exact hardware timer implementation used depends on the target, where LAC timer is used for ESP32. Aug 25, 2021 · This is one of the rare super-standard-examples I have a ready to use code for. 0. cppで定義されている変数です。 The ESP32 chip features 34 physical GPIO pins (GPIO0 ~ GPIO19, GPIO21 ~ GPIO23, GPIO25 ~ GPIO27, and GPIO32 ~ GPIO39). I am working from the example sketch in that installed with the ESP32 Dev Module into the Arduino IDE. To get the date and time with our ESP32 through the NTP server, the server will operate in the client-server model. At runtime: if CONFIG_LOG_MASTER_LEVEL is enabled then a Master logging level can be set using esp_log_set_level_master(). Kconfig provides a compile-time project configuration mechanism and offers configuration options of several types (e. ESP32 uses two hardware timers for the purpose of keeping system time. I have a number of questions about how to use the clock that is set up with configTime using NTP. I am trying to find the documentation, but I'm having difficulty identifying exactly who is providing me Jul 17, 2023 · Using Arduino Microcontrollers. Use these GPIO pins to connect the two ESP32 boards together. The clock tree driver maintains the basic functionality of the system clock and the intricate relationship among module clocks. Releases ESP32 is a single 2. h> #include <esp_sntp. org"); is used. Select the Port (if you don’t see the COM Port in your Arduino IDE, you need to install the CP210x USB to UART Bridge VCP Drivers ): 3. const time_t sec = mktime(&local); // make time_t. All of these three values were already defined by us. . Arduino core for the ESP32を使った、ESP-WROOM-32開発ボードのWi-Fi接続とNTPクライアント機能についての実験です。. ntp. As such, it assumes that the previous tutorial explaining the basics of the ESP32 system time and SNTP was already followed. 使用下面函数从网络时间服务器上获取并设置时间：. If I use configTime(0, 0, ntpServer) without the setenv and tzset I just get the current time in UTC. ESP32 is designed for mobile, wearable electronics, and Internet-of-Things (IoT) applications. This information can all be found in Heap Memory Allocation. I tried out to use the Timezone Library Jun 13, 2021 · Next, we will use the configTime() function and pass three arguments inside it. The various watchdog timers can be enabled using the Before optimizing ESP-IDF RAM usage, it is necessary to understand the basics of ESP32 memory types, the difference between static and dynamic memory usage in C, and the way ESP-IDF uses stack and heap. It features all the state-of-the-art characteristics of low-power chips, including fine-grained clock gating, multiple power modes,and dynamic power ESP32-C2 is also supported by Arduino-ESP32 but requires rebuilding the static libraries. Open Arduino IDE on your PC. ついでに、NTPサーバから取得した時刻を、I2C接続の有機ELキャラクタディスプレイに表示してみました。. I have two different sketches, both using the same function to initialise the network and do a sync with NTP. See Sleep Modes for these sleep modes and sub sleep modes. The two hardware timers are: 時刻 Arduino(ESP32/時刻)リファレンス configTime() NTPサーバと、ローカルのタイムゾーンを設定する(オフセット指定)。 configTzTime The reason for using this timer is to achieve greater accuracy. ESP Timer hides the complexity associated with May 7, 2020 · 手順: 時刻同期. println (ctime (&now)); Mar 11, 2018 · configTime(gmtOffset_sec, daylightOffset_sec, ntpServer); That's it! The ESP32 seems to have low-level functions to gather this in a much more efficient way than the c++ code used to with the ESP8266 or Arduinos. Sep 1, 2021 · In this tutorial we are going to learn how to configure the system time on the ESP32 and how to obtain the current time, using the Arduino core. P. The code below is the actual time structure that can be found in time. Sep 4, 2022 · configTime()は、NTPサーバと時刻を同期させるとともに、ローカルのタイムゾーンの設定を行います。 WiFi. Jan 24, 2020 · The functions configTime and getLocalTime are from ESP32 core file esp32-hal-time. begin()により、ssidで指定したアクセスポイントに接続します。この際のパスフレーズは、passwordです。WiFiは、WiFi. Contribute to espressif/arduino-esp32 development by creating an account on GitHub. We are going to use the Simple Network Time Protocol (SNTP) to do the synchronization of the ESP32 time with a time server. Internally, esp_timer uses a 64-bit hardware timer. Sep 3, 2021 · In this tutorial we are going to learn some additional functionalities from the ESP32 system time and SNTP synchronization, using the Arduino core. ESP32 Dev Module) and COM port. (11/2018) remarks SPI Master Driver. But 'm not connected to the internet. To generate a periodic interrupt every 50ms, we need to set the timer’s prescaler value and the alarm register’s value (TimerTicks) as well. However, due to the flexibility of its data format, RMT can be extended to a versatile and general-purpose transceiver, transmitting or receiving many other types of signals. in Documents\Arduino\hardware\espressif\esp32\cores\esp32 you will find a routine esp32-hal-time. void configTime(long gmtOffset_sec, int daylightOffset_sec, const char* server1, const char* server2 = nullptr, const char* server3 Jul 26, 2020 · Hello, I'm want to use an ESP32 with a DS3231 RTC to have a track of Time. With your Arduino IDE open, follow these steps: 1. 7. The two hardware timers are: Mar 28, 2023 · tzset(); With these 3 lines you define your timezone an the NTP server. Plug the ESP32 board to your computer. h is standard C time library. RTC 定时器 ：RTC 定时器在任何睡眠模式下及在任何复位后均可保持系统时间 Feb 8, 2022 · Finally, the following line tells the ESP32 to synchronize the time with an Internet server using the Network Time Protocol (NTP): configTimeWithTz(getTzByLocation(location), ntpServer); The particular Internet time-server can be configured using the following line, although the default should work fine for you: Introduction. I2C. We will use the NTP server: pool. ESP32 has 2 I2C controller (also called port), responsible The ESP32 dev bord can be optained for about $4 and the W5500 module for about $2. S. Doing the setenv and tzset then changes the timezone and DST according to the Get Started. So you can try to find call of this function and remove it ;) BUT: I advise you to not disable watchdog. LEDC channels are divided into two groups of 8 channels each. Mar 7, 2022 · NTP SERVER WORKING. e. Our ESP32 development board will be the client and will connect to the NTP server through UDP on port 123. , F4R4 stands for an ESP32-S3 with Quad Flash and Quad PSRAM Note On ESP32-S3, MSPI stands for the SPI0/1. c. The ESP Timer feature allows for creating software timers and invoking their callback functions (dispatching callbacks) on timeout. I am testing on a ESP32-WROVER-B module. load time from eeprom. Sep 2, 2022 · These are the ESP32 GPIO pins that will be used in SPI communication. Through IO MUX, RTC IO MUX and the GPIO matrix, peripheral input signals can be from any IO pins, and peripheral output signals The ESP32 chip has 3 UART controllers (also referred to as port), each featuring an identical set of registers to simplify programming and for more flexibility. No need for external RTC module or NTP time synchronization. it's newlib; we don't need to debug it; DST is automagically handled (check the example) Aug 8, 2018 · Enter ESP32-specific. The clock subsystem of ESP32 is used to source and distribute system/module clocks from a range of root clocks. We’ll utilise the pool. localtime(&sec); //set time. This function is used to configure the timer. Getting Date and Time from NTP Server Using ESP8266. In the Extension, select ESP-IDF option: We will click the ‘ sntp ’ under the Protocols tab. F stands for Flash, R stands for PSRAM, x stands for line mode. h". So far, this works: #include <TinyGPS++. You don't need more for NTP on an ESP32! Next, we add some code to output the current time on the serial monitor. from 1 to 16 if CONFIG_BOOTLOADER_APP_ANTI_ROLLBACK. The ESP32 offers configTime() methods that facilitate NTP synchronization. Overview. int wifiTimeout = 180; const char* ntpServer = "pool. SPI Master driver also supports SPI1 but with quite a few limitations, see Notes on Using the SPI Master Driver on SPI1 Bus. To set the timezone, we created a function called setTimezone () that accepts as an argument a timezone string. My code is as follows. hw_timer_t * timerBegin(uint32_t frequency); frequency select timer frequency in Hz. Sets how quickly the timer counter is “ticking”. The advantage of this technology is that the device does not need to directly Jul 15, 2022 · Arduino ESP32 获取网络时间并同步本地RTC时钟 相关篇《Arduino ESP32 最简单直接获取网络时间方法》 在 ArduinoESP32核心支持库当中已经包含相关的获取时间的库，获取网络时间后，就可以不依赖网络，重复去获取时间，如果长时间运行，可以设置间隔时间同步NTP时间 Aug 11, 2022 · Una vez que ESP32 está conectado a la red, inicializamos el cliente NTP usando la configTime() función para obtener la fecha y la hora de un servidor NTP. <code>. Code that executes faster can also have other positive effects, e. This programming guide is split into the following sections: Basic Ethernet Concepts. You can use setTimeZone to set the time zone. ESP32-C3 uses two hardware timers for the purpose of keeping system time. Through IO MUX, RTC IO MUX and the GPIO matrix, peripheral input signals can be from any IO pins, and peripheral output signals Overview. org NTP server, which is easily available from anywhere on the planet. Now let’s proceed with our project. available() > 0 The reason for using this timer is to achieve greater accuracy. struct timeval val; loadStruct(&local); // e. The client will be our ESP32 development board, which will connect to the NTP server over UDP on port 123. Project Configuration . Each UART controller is independently configurable with parameters such as baud rate, data bit length, bit ordering, number of stop bits, parity bit, etc. , reducing overall power consumption. ESP32 Code Getting Epoch/Unix Time from NTP Server. 0以降、従来説明した方法では時刻が18時間ずれるようになりました。従来は configTime()関数で設定を行ってましたが、2. configTime(gmtOffset_sec, daylightOffset_sec, ntpServer); printLocalTime() May 20, 2018 · I have some weird issues with configTime. The arguments will be the GMT offset, the daylight offset and the NTP server respectively. Click ‘Choose Template’ button to proceed forward. org"; const long utcOffsetSeconds = 3600*utcOffset; instead of defining UTC+x and Daylight offset, using NTZ instead. Now program the following code on your NodeMcu board and see the result in Serial Monitor: /*. So in case of a power loss, the time will be loaded from the EEPROM. A single ESP32's flash can contain multiple apps, as well as many different kinds of data (calibration data, filesystems, parameter storage, etc). Also, I want to be able to set the Daylight Saving Time, I thought about writing the code that it Updates the time over a NTP Server every last Sunday of March at 2 am and Oktober at 3 am. The getLocalTime () function retrieves the system time from your ESP32 (which if you recall was saved by the configTime function) and stores it in a time structure named tmstruct in this example. You will get a notification that the project has been created. The LED will be set up as a digital output and will be toggled after a set number of intervals. h for current lib and use as follows. ESP-IDF supports multiple types of watchdogs: The Interrupt Watchdog is responsible for ensuring that ISRs (Interrupt Service Routines) are not blocked for a prolonged period of time. Star Notifications Oct 2, 2019 · The ESP32 supports I2C communication through its two I2C bus interfaces that can serve as I2C master or slave, depending on the user’s configuration. RTC 定时器 ：RTC 定时器在任何睡眠模式下及在任何复位后均可保持系统时间 Now, coming to the setup and the loop. org", "time. It includes <WiFi. Sep 4, 2022 · 書式. 根据应用目的及对系统时间的精度要求，既可以仅使用其中一种时钟源，也可以同时使用两种时钟源。. RTC chips, despite their utility, can be slightly imprecise, necessitating frequent manual adjustments for synchronization. for ESP8266: configTime(TZ_Asia_Jerusalem, ntpServer); Mar 21, 2022 · 概要. NTP Clock with NodeMCU. g. ESP32 supports two major power saving modes: Light-sleep and Deep-sleep. Time will be measured at 1 us resolution. After you have copied the code, click the May 24, 2020 · esp8266 arduino ver 2. First, you need to include the WiFi library to connect the ESP32 to the internet (NTP server) and the time library to deal with time. I'm experimenting with the time. ESP Timer is useful when user software needs to perform delayed or periodic actions, such as delayed device start/stop or periodic sampling of sensor data. h as part of its core I used relevant TZ as shown. h> #define uS_TO_S_FACTOR 1000000 #define TIME_TO_SLEEP 20 //This is 20seconds for the purposes of troubleshooting. The output is done in 3 steps: First you update the variable "now" and take over the current time stamp. In our code, we are still going to use the Arduino core configTime SmartConfig. 使用STA或ETH模式连上互联网；. From the perspective of network layering, the RMT hardware contains both May 27, 2022 · For your timezone, the usage should be `configTime (3600*11, 3600, ntpServer). While many tutorials focus on sensor readings and data storage, the crucial aspect of ensuring data accuracy often gets overlooked. struct tm {. Jun 7, 2022 · Hi. ESP32 has 2 I2C controller (also called port), responsible The ESP32 Wi-Fi programming model is depicted as follows: Wi-Fi Programming Model. Only on one sketch it works fine, time is updated, other sketch the time defaults to 01-01-1970 09:00:00. Measuring Static Memory Usage ESP8266 NodeMCU DateTime NTP : ดึงเวลาจาก Server มาใช้งานจาก NodeMCU NodeMCU สามารถดึงเวลาจาก Servr ที่มีเวลาแม่นยำเที่ยงตรงมาใช้งานได้ ดังนี้ ตัวอย่า Set and retrieve internal RTC time on ESP32 boards. The settings for the system time source are as follows: RTC and high-resolution timer (default) RTC. nist. They work with the RTC peripheral of the ESP32. As long as the WLAN-connection is active the time is synchronised through the WLAN-connection. This determines how many times the security version can be increased. 50 (incl postage) A more compact version of the W5500 module costs $1 more at this time. According to the features used by an application, there are some sub sleep modes. [中文] SPI Master driver is a program that controls ESP32's General Purpose SPI (GP-SPI) peripheral (s) when it functions as a master. AP mode (aka Soft-AP mode or Access Point mode). Open the Library Manager by clicking on the Library Manager icon on the left navigation bar of Arduino IDE. It has 8 channels which can generate independent waveforms that can be used, for example, to drive RGB LED devices. for ESP32: a) replace to configTzTime as shown. By regularly synchronizing the ESP32's RTC with an NTP server, you can ensure that your device maintains accurate timekeeping, even in scenarios where the ESP32 may experience clock drift or be subjected to varying environmental conditions. On startup the device fir Connect the ESP32 board to your PC via a micro USB cable. I've been using calls to the NTP Server to set the time and date for ESP32 real-time projects. h>. However, improving execution speed may have trade-offs with other aspects of performance such as Minimizing Binary Size. 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. Read the documentation. The ESP32 has two I2C channels and any pin can be set as SDA or SCL. org which is easily accessible for everyone worldwide. ESP32 connects to an access point. b) Copy relevant TZ from TZ. I don't know how esp32 works regarding time management, but the new configTime() based on newlib (which esp32 use too) is more robust than a user defining his own time, because. The partition table length is 0xC00 bytes, as we allow a maximum of 95 entries. After that, a simple example will show you how to use ESP-IDF (Espressif IoT Development Framework) for menu configuration, then for building and flashing firmware onto an ESP32 board. That's how I set time. , integers, strings, and Booleans). Then it covers the clock tree APIs Jan 18, 2020 · You'll have to write your own function that can use the TinyGSM Client's TCP connection to get the time from a TCP source (like the NIST daytime server, but not NTP) and then set the onboard clock manually based on the time returned. Optimizing execution speed is a key element of software performance. 在 Arduino core for the ESP32中获取网络时间是非常简单的，只要下面几步就行：. In the setup, we initialize Serial, connect to the internet using our WiFi, and configure the internal RTC of ESP32 using the configTime() function. Select the right ESP32 board (e. May 26, 2018 · Would you know how to set the time, when obtained from GPS? In most examples configTime(0, 0, "pool. Code: Select all. Mar 19, 2020 · Learn how to request date and time from an NTP Server using the ESP32 with Arduino IDE. ESP32 使用两种硬件时钟源建立和保持系统时间。. Learn how to use the NTP Client library to get date and time from an NTP server with your ESP32 and Arduino IDE. configTime(gmtOffset_sec, daylightOffset_sec, ntpServer); Ahora podemos simplemente llamar a la printLocalTime() función personalizada cada vez que queramos The ESP32 chip features 34 physical GPIO pins (GPIO0 ~ GPIO19, GPIO21 ~ GPIO23, GPIO25 ~ GPIO27, and GPIO32 ~ GPIO39). This function will return timer structure if configuration is successful. markbeeman July 17, 2023, 3:27am 1. Jul 14, 2022 · Any help would be appreciated. ’. This includes configuration for: Station mode (aka STA mode or Wi-Fi client mode). Even a recurrent configTime() (every few minutes) doesn't update. Sep 19, 2023 · I noticed that getLocalTime() is consistently taking 5-10+ seconds to complete. Compatibility. gov"); time_t now = time (nullptr); Serial. TOUT is desired to be 50ms. MIT license 194 stars 34 forks Branches Tags Activity. Introduction. Additionally, there are some power-down options that can be configured to further reduce the power consumption. No installation required! An Arduino library for setting and retrieving internal RTC time on ESP32 boards License. ESP32 Timer Interrupt – Arduino Code Example. 0以降は configTzTime()関数を使用することをお勧めします。 使い方. The Wi-Fi libraries provide support for configuring and monitoring the ESP32 Wi-Fi networking functionality. Sep 29, 2023 · What are the main differences between ESP32 and ESP8266 boards? The ESP32 adds an extra CPU core, faster Wi-Fi, more GPIOs, and supports Bluetooth 4. The application task (code) generally calls Wi-Fi driver APIs to initialize Wi-Fi and handles Wi-Fi events when 概述. #if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2 #define GPIO_HANDSHAKE 2 #define GPIO_MOSI 12 #define GPIO_MISO 13 #define GPIO_SCLK 15 #define GPIO_CS 14 Sep 10, 2022 · Install ESP32 ESP-IDF on Windows; Install ESP32 ESP-IDF on Linux Ubuntu; ESP-IDF Timer Interrupt Example . h. h> ----- while (Serial. Now click ‘ Create project using template sntp . Run IoT and embedded projects in your browser: ESP32, STM32, Arduino, Pi Pico, and more. const byte OnBoard_LED = 2; Overview. For more information, see the Lib Builder documentation. wifi 設定後、configTime () により、NTPサーバーを設定する。. Its length is limited to 32 bits for ESP32 and 16 bits for ESP32-S2. See the code, variables and functions to configure and print the time in the Serial Monitor. Connect Driver to TCP/IP Stack. Jan 31, 2019 · I wanted to store the time in the EEPROM and only sync time via ntp rarely. SPI1 is not a GP-SPI. Note. To get date and time from NTP using Nodemcu module or other ESP8266 based modules, you must first install the NTP library by searching Library Management. Search “RTClib”, then find the RTC library by Adafruit. Select your Board in Tools > Board menu (in my case it’s the DOIT ESP32 DEVKIT V1) 2. This document starts with the introduction to root and module clocks. Remove star from interrupt watchdog. But therefore I need the code to know which date every last Sunday of March and Oktober is. 4. I2C is a serial, synchronous, multi-device, half-duplex communication protocol that allows co-existence of multiple masters and slaves on the same bus. You can use the SDK functions to set the time and zone. This is not trivial and requires a good understanding of the ESP-IDF build system. Maintainer: fbiego. Introduction . The reason for using this timer is to achieve greater accuracy. In this guide, you will see the most relevant configuration to get your project optimized and working. Configure MAC and PHY. This wraps the ESP32 SDK functions. @hcheung the code as it is works for setting the timezone and DST from an NTP update. 这两种硬件时钟源为：. To clarify I am doing this in Arduino IDE with ESP32 Core 2. Modules are identified by their tags, which are human-readable ASCII zero-terminated strings. Nov 8, 2022 · Learn how to use ESP32 PWM with Arduino IDE: ESP32 PWM with Arduino IDE. #include <WiFi. 日本では 3600*9 (9時間) The function esp_log_level_set() can be used to set a logging level on a per-module basis. 4 GHz Wi-Fi-and-Bluetooth SoC (System On a Chip) designed by Espressif Systems. 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. After successful setup the timer will automatically start. 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. For this reason a partition table is flashed to (default offset) 0x8000 in the flash. The size of the efuse secure version field. The two hardware timers are: void configTime(long gmtOffset_sec, int daylightOffset_sec, const char *server1, const char *server2, const char *server3) 0. ESP-IDF provides a set of consistent and flexible APIs to support both internal Ethernet MAC (EMAC) controller and external SPI-Ethernet modules. First, open your Arduino IDE and click on File > New to open a new file. Nov 7, 2021 · In this ESP32 tutorial, we will learn about the Realm of Realtime Clock (RTC) possibilities with the versatile ESP32 board. h> and "time. Arduino core for the ESP32のインストールの Arduino core for the ESP32. See the code, examples and how to adjust the timezone offset. //init and get the time. configTzTime()関数で設定を行います。 Aug 30, 2022 · For ESP-IDF target, we have chosen ESP32 module. Range: from 1 to 32 if CONFIG_BOOTLOADER_APP_ANTI_ROLLBACK. The RMT (Remote Control Transceiver) peripheral was designed to act as an infrared transceiver. It uses the APB_CLK clock source (typically 80 MHz), which has a frequency deviation of less than ±10 ppm. The APB_CLK has a default value of 80MHz. It uses a mobile application to broadcast the network credentials from a smartphone, or a tablet, to an un-provisioned Wi-Fi device. You may change these pins as well. We will use the Get_Epoch_Time () function in our script which will return the current epoch time. 2 and Bluetooth low energy. Default value: 32 if CONFIG_BOOTLOADER_APP_ANTI NTP Server Working. SRGDamia1 closed this as completed on Jan 20, 2020. begin(SDA, SCL); Overview. 書式: void configTime (long gmtOffset_sec, int daylightOffset_sec, const char* server1, const char* server2, const char* server3); パラメータ : gmtOffset_sec GMTとローカル時刻との差 (秒)。. The esp-idf-kconfig package that ESP-IDF uses is based on kconfiglib, which is a Python extension to the Kconfig system. According to esp-idf docs void esp_int_wdt_init() is used to init interrupt watchdog. I2C uses two bidirectional open-drain lines: serial data line (SDA) and serial clock line (SCL), pulled up by resistors. Therefore, we need to recall the ESP32 Timer’s equation. When using the ESP32 with the Arduino IDE, the default I2C pins are: GPIO 21 (SDA) GPIO 22 (SCL) If you want to use other pins when using the wire library, you just need to call: Wire. Accordingly to the ESP32 datasheet, the I2C interfaces of the ESP32 supports: Standard mode (100 Kbit/s) Fast mode (400 Kbit/s) Up to 5 MHz, yet constrained by SDA pull-up strength esp_timer set of APIs provides one-shot and periodic timers, microsecond time resolution, and 64-bit range. iq qx yn zm tp wm rg bh py bf