Esp32 external interrupt pins gpio. Write better code with AI Security.

Esp32 external interrupt pins gpio With timer wake How to start with external interrupt in esp32? How many external interrupts are there in esp32? pls reply me. When the logic state of an externa A GPIO interrupt is a signal that causes the processor to stop its current execution and jump to a specific piece of code known as an interrupt service routine (ISR). This allows the ESP32 to handle high-priority tasks immediately, In this ESP-IDF tutorial, we will learn to use ESP32 GPIO Interrupts using ESP-IDF. 0. h> struct Button { const uint8_t PIN; uint32_t Hardware interrupts – These occur in response to an external event. This function is incompatible with gpio_isr_register() - if that function is used, a single global ISR is registered for all GPIO interrupts. In my project I need several external GPIO interrupts, all GPIO pins are connected to one source. UART0 is usually reserved for communication with the serial If you want to use an interrupt pin to wake ESP32 from deep sleep then you have to use so called RTC_GPIO pins. h> #include <xtensa/corebits. Set to -1 if unused . h> #include "soc/gpio_reg. When an event occurs that generates an interrupt, the With ESP32, we can configure all the GPIO pins as hardware interrupt sources. During task switching, these tasks can migrate between cores. gpio_num_t gpio = PIN_ROT_A; xQueueSendToBackFromISR(q1, &gpio, NULL);} #endif ESP8266EX and ESP32 are some of Interrupt Allocation Overview The ESP32 has two cores, with 32 interrupts each. 7 posts • Page 1 of 1. PWM GPIO pins Learn: how to debounce for button in ESP32, How to do button debounce using millis() function, how to program ESP32 step by step. In most microcontrollers, there are some dedicated GPIO pins that have an interrupt event generation capability. Never register an interrupt handler with ESP_INTR_FLAG_IRAM flag if you are not 100% sure that all the code and data that the interrupt ever accesses are in IRAM (code) or DRAM (data). The external interrupt ISR Hardware interrupts, or GPIO interrupts allow the microcontroller to detect and respond to specific changes in the input pins, even while the main program is running. RTC Controllers contain logic to trigger wakeup using RTC GPIOs. STM32 wake up from standby by WKUP pin rising edge. ESP32 and ESP8266 Interrupt Pins Interrupt Pins ESP32. See Interlocking. Usually referred to as IRQ pins or external interrupt pins. Each interrupt has a certain priority level, most (but not all) interrupts are connected to the interrupt mux. ISR and framework. Wenn ihr bei der Interrupt Service Routine (ISR) das Attribut IRAM_ATTR anwendet, wird der Code nicht im Flash, sondern im RAM I am trying to add interrupt with my esp32 and came across the following example from Arduino IDE (under esp32 section) Here is the example code #include <Arduino. As it was for pin management, the management of the interrupts in the esp32 chip is also quite complex: the chip offers indeed up to 32 interrupt slots for each core, with different priorities Luckily, the framework really simplify the interrupts configuration. ESP32 external pin wakeup with internal pullup resistor. Ihr könnt Interrupts an jedem GPIO Pin einrichten, einschließlich der reinen Eingänge GPI34 – GPI39. This So I have a code that wakes the ESP32 up on button push : /* Deep Sleep with External Wake Up Push Button to GPIO 33 pulled down with a 10K Ohm resistor GND --- 10k --- BP --- VCC | ---- Pin 33 Only RTC IO can be used as a source for external wake source. h> #include <xtensa/config/system. Use it with a scope or a logic analyser: 2700000 served interrupts/s (Pins 18 and 19 must be shortened) BTW: a cooperative multitasking using only core 1 may be an other solution because core 1 never will be interrupted by RTOS. Each pin can be used as a general-purpose I/O, or to be connected to an internal peripheral signal. external 0 interrupt (only 1 pin and level High or Low both available) ESP32 Deep Sleep Wake by Multiple External GPIO Interrupt with Active Low Configuration. Currently pin interrupt routine assumes the hardware will filter base on selection (FALLING, RISING, LOW, HIGH, CHANGE). This means any change of state in any of these pins can trigger an interrupt provided that the attachInterrupt() function in Arduino has been 1. External interrupts provide significant benefits. The ESP32 SoC families supports the internal pullup and pulldown through a 45kR resistor, that can be enabled when configuring the GPIO mode as INPUT mode. Instant dev environments Issues. Contribute to MacLeod-D/ESp32-Fast-external-IRQs development by creating an account on GitHub. External interrupts are very useful. Interrupt Pins. Skip to content. Initialize an input pin with external interrupt enabled; In the external interrupt handler: get the time between every two rising edges and use it to get the frequency in Hz. ESP8266 GPIO Interrupt. All GPIO pins can be configured to generate interrupts on various events, such as rising or falling edges, or low or high levels. Therefore it is impossible to tell which CPU the interrupt is allocated The code example down below does the following: We start with defining and attaching The PWM GPIO pin. * GPIO status: * GPIO18: output (ESP32C2/ESP32H2 uses GPIO8 as the second output pin) * GPIO19: output (ESP32C2/ESP32H2 uses GPIO9 as the second output pin) * GPIO4: input, pulled up, interrupt from rising edge and falling Consider ext0 as a vigilant guard posted at a specific entrance on your ESP32 called a GPIO pin. PWM can be produced on any GPIO pins except for digital input pins . ext0: This is used when a single GPIO pin is being accessed. To attach an interrupt, we will use the The easiest way to trigger interrupts is to use a wire to connect and disconnect the digital pin where the interrupt was attached to GND. The pin I’ll be using a PWM pin is GPIO5 in this example. This function is incompatible with gpio_isr_register() ESP32 interrupt pins: you can use all GPIOs as interrupts, except GPIO 6 to GPIO 11. And in the main loop() function, I’ll read the ESP32 ADC analog input (potentiometer – GPIO35 pin), To wakeup from a touch sensor interrupt, users need to configure the touch pad interrupt before the chip enters Deep-sleep or Light-sleep modes. Find this and other ESP32 tutorials on esp32io. To test the code, simply upload it to your ESP32 and open the Arduino IDE serial monitor. ESP32 Servo Motor Web Server. The example shows how to set up a simple GPIO interrupt which I already understand. Normally, you should use digitalPinToInterrupt(GPIO) to set the actual GPIO as an interrupt pin. Thanks in advance. Wi-Fi Security. All general-purpose input output pins can be used as external interrupts. Write better code with AI Security. These are namely: Timer Wake up & External Wake up. Our subject will be my dev board ( info here ) featuring a Xiao ESP32-C6. Madhav The ESP32-S3 has two cores, with 32 interrupts. c example, which indicates that some output pins must be connected to some input pins. (GPIO_0) as an interrupt pin and it will button input (interrupt) during the falling edge. intr_type = GPIO_INTR_NEGEDGE, . To test this hypothesis, you'd have to write your interrupt handling and GPIO using the underlying ESP IDF framework, not Arduino. The interrupt types can be level-triggered, edge-triggered, or state change. Compile and upload the firmware. Let’s study ESP32 interrupts in Arduino IDE, both of them (timer ones and external ones). ESP8266 interrupt pins: you can use all GPIOs, except GPIO 16. My design requires 18 external interrupts and looking the datasheet of the ESP32 My hypothesis is that the Arduino implementation of either the GPIO or interrupt handling has poor performance, adding an order of magnitude of extra latency. ESP32 External Interrupt Wake Up. Update LCD with Webserver. Yes, my board start normally if I don't control anything. I believe that every GPIO pin can on the ESP32 can be configured to indicate a Getting Started With ESP32 ESP32 GPIO (Inputs/Outputs) ESP32 Serial Print ESP32 PWM Tutorial ESP32 Change CPU Clock Speed ESP32 ADC Tutorial ESP32 External Interrupt Pins ESP32 I2C Tutorial ESP32 Timers & Timer I have spent quite a bit of time troubleshooting this issue and I still am looking for suggestions. Post by Nikosant03 » Tue Apr 27, 2021 8:58 am . Hello @dovov97815 This guide gives details about GPIO interrupt in ESP32, and how to configure GPIO interrupt using Arduino IDE. The diagram below shows the pinout of the GPIO pins in ESP32 that can be used. For example, if you want to use GPIO 27 as an interrupt, use: I would like to do hardware interrupt which when one of the rtc gpio pin goes high a counter is incremented while a seperate timer interrupt run and occasionally wakes up the main xtensia cores which fetches data from the rtc and sends it over. ext1: This is used when several GPIO pins are being I'm testing the gpio_example_main. After putting the ESP32 into deep sleep mode, there are several ways to wake it up: You can use the timer, waking up I'm curious enough to try your sketch and test it myself after seeing your comment saying what I suggested doesn't work. section . Every time I touch one of these input pins, their respective interrupts get triggered. kolban Posts: 1683 Joined: Mon Nov 16, 2015 4:43 pm Location: Texas, USA. * This test code shows how to configure gpio and how to use gpio interrupt. To setup an interrupt in MicroPython, you need to follow the next steps: 1. Sign in Product GitHub Copilot. The easiest way to trigger interrupts is to use a wire to connect and disconnect the digital pin where the interrupt was attached to GND. ESP32 I/O Interrupt — GPIO ของ ESP32 สามารถตั้งค่าให้สร้าง Interrupt ขึ้น 5 สถานการณ์ด้วยกัน RISING External interrupt wake up; Touch pin wake up; We’ll be focusing on two methods in this tutorial comprehensively. Post by kolban » Sat Dec 17, 2016 4:17 pm . Probably due to a release change of esp-idf (currently I'm on v2. Care should be taken when calling esp_intr_alloc() from a task which is not pinned to a core. Together these modules External Interrupts. Each pin can be used as a general-purpose I/O, or be connected to an internal peripheral signal. Unit Testing in ESP32. Hi everyone, I want to intergrate the ESP32-S2-MINI-1 module to my design. PWM GPIO pins. ext1: This is used when several GPIO pins are being In the case of external pull resistors, I used 1K and 10K resistors for testing. Find and fix vulnerabilities Actions. Die Handhabung ist wie bei den Arduino Boards, bis auf eine Besonderheit. For example, a GPIO interrupt (when a key is pressed). Button interrupts are technically referred to as external interrupts. h" #define DRDY_INT_PIN_BITMASK (1<<27) // GPIO27 as interrupt pin . uint32_t invert_level_input Invert the input level signal You can use an external interrupt to wake up the ESP32 from deep sleep. The table below provides users with a detailed description of FireBeetle 2 ESP32-E GPIO. We will demonstrate GPIO Interrupts through an example that uses a push button and an LED. ESP32-S2-MINI-1 - External Interrupts. First, GPIO2 is one of the those strapping pins, which has an external pull-up resistor and also likely connect to the blinking LED, so you should connect the button between the pin and GND instead as One of the most used and versatile peripheral in a microcontroller is the GPIO. For example, an external push button connected to ESP32’s GPIO or a motion sensor will generate an interrupt (event) if a motion is detected. I'll do more tests. Then, we’ll be configuring the PWM Channel’s frequency (1kHz) & resolution (12-Bits to be similar to the ADC_Result). First, you have to install the service that manages the interrupts for GPIO pins: I want to use SENSOR_CAPN and SENSOR_VN pins to act as external interrupt pins to read a rotary dial. I've tested this example a long time ago without issues, but this time I'm having troubles when I do not connect the input pins. int level_gpio_num GPIO number used by the level signal, input mode with pull up enabled. Ethernet MAC. Automate any workflow Codespaces. On a non shared interrupt it will correctly respond. GPIO_INTR_NEGEDGE = Falling Edge interrupt = on the previous clock cycle, the pin was high and on this clock cycle it's low. After that, it returns to the current program. ESP32 supports external interrupts on all GPIO pins. For ESP32 we can use all GPIO pins for external interrupt except for GPIO6, GPIO7, GPIO8, GPIO9, GPIO10, and GPIO11. Even if I stop ZCD signal my board starts normally with same application, when I connect ZCD signal to the GPIO it starts giving WDT reset log on serial port. Source code Note the two defines at the top of the code for which GPIO pin on the ESP32 you are using and then // This is the ESP32 External Sensors. Interrupts are generated based on the variations of the signal the pins To use Ext0 or Ext1 as a wake-up source, you need to configure the corresponding GPIO pin as an input and enable the external interrupt using the ESP32 SDK’s GPIO API. Software Interrupts – These occur in response to a software instruction. Re: external interrupt in esp32. gpio_num_t gpio = PIN_ROT_A; xQueueSendToBackFromISR(q1, &gpio, NULL);} #endif ESP8266EX and ESP32 are some of The ESP32 chip features 34 physical GPIO pins (GPIO0 ~ GPIO19, GPIO21 ~ GPIO23, GPIO25 ~ GPIO27, and GPIO32 ~ GPIO39). ESP32 Interrupt Pins. Let it be A9 pin for example! It’s EXTI line 9 (We’ll connect a push button to it). e. The guard (ext0) wakes up the dozing ESP32 and calls out, “Hey, wake up!” whenever someone (or whatever) presses the doorbell by altering the voltage on the GPIO pin. Step5: Go To GPIO Config Tab, And Select The A9 Pin EXTI interrupt edge GPIO Interrupt. Finally, we have tested it using ESP32 Board Let’s write an Arduino sketch to set a rising edge-interrupt on the 12th GPIO Note. The ESP32 chip features 34 physical GPIO pins (GPIO0 ~ GPIO19, GPIO21 ~ GPIO23, GPIO25 ~ GPIO27, which allows per-pin GPIO interrupt handlers. h. Print the measured frequency to the I2C LCD display; Keep repeating ESP32 Frequency Counter With I2C LCD – Arduino Code. I test it on my custom ESP32-C3 board. ESP32 Motion Detection. You can configure the ESP8266 to generate an interrupt External interrupt pins. , ESP_PD_DOMAIN_RTC_PERIPH should be set to ESP_PD_OPTION_AUTO). Register GPIO interrupt handler, the handler is How to start with external interrupt in esp32? How many external interrupts are there in esp32? pls reply me. Disregarding this will lead to (sometimes spurious) cache errors. For example, this peripheral is widely used to create the LED blinking or Description. An interrupt is a function triggered asynchronously by an external event that momentarily interrupts the current code’s execution to execute more critical code. Hi, Good Afternoon! We are using two external interrupts on the esp32, one interrupt is attached to core 1 (this is a high level interrupt on GPIO_NUM_35) and the other one is a low level interrupt which is tied to core 0 on GPIO_NUM_27. Register GPIO interrupt handler, the handler is So I used Arduino IDE. GPIO_2 = clock 8 MHz (and 20MHz) GPIO_4 = interrupt pin connected to GPIO_2 GPIO_5 = Pulse generated by external interrupt Oscilloscope IMAGE ( 8 MHz): Support for External RAM. It’s simple, We can awake ESP32 simply by providing low or high levels on ESP32 pins. External interrupt detected by task Core1 --300ns--> RTOS_2 (core 0) reacts. Wi-Fi Driver. global xt_highint5 . This must also be true for code and data accessed indirectly through function calls. [ Frequency = 1/Period ]. Press the push button to wake up and see the LED Blinking 10 times before going back to sleep again. With this code, watching pins '14' and '13' with a oscilloscope, I detect that the execution of interrupt is delayed about 50us aprox. ESP32 deep Sleep wakeup with disabled RF. In most microcontrollers (including ESP32), the main distinction is edge vs level interrupts. These Configuration variables:¶ pin (Required, Pin Schema): The GPIO pin to use for the switch. We will configure pin 5 of the ESP32 to accept external interrupts here. I assume(ass u me) that the code has been tested in a single interrupt(non Shared) environment. Therefore it is impossible to tell which CPU the interrupt is allocated ESP32: 3 Million external Interrupts per Second. Through GPIO matrix, IO MUX, and RTC IO MUX, peripheral input signals can be from any GPIO pin, and peripheral output signals can be routed to any GPIO pin. Set Up an Interrupt in MicroPython. Each interrupt has a fixed priority, most (but not all) interrupts are connected to the interrupt matrix. interlock (Optional, list): A list of other GPIO switches in an interlock group. I believe that every GPIO pin can on the ESP32 You can use an external interrupt to wake up the ESP32 from deep sleep. mode = GPIO_MODE_INPUT ESP8266EX and ESP32 are some of our products Step4: Click On The Pin You Want To Configure As An External Interrupt Input. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with ESP32. Here I am not using any interrupts other than ZCD interrupt (External interrupt) 2. ESP32 has a single Ethernet MAC (Medium Access Control) controller. Nikosant03 Posts: 12 Joined: Wed Mar 13, 2019 11:44 pm. There are two types of external wake-ups in the ESP32. Thread Local Storage. when the ESP32 is transmitting by Wifi, when wifi transmission is idle it is high stable. Revisions 0 and 1 of ESP32 only support this wakeup mode when RTC peripherals are not forced to be powered on (i. The Full code Listing Learn more about SPI communication protocol with the ESP32 using Arduino IDE: ESP32 SPI Communication: Set Pins, Multiple SPI Bus Interfaces, and Peripherals (Arduino IDE) UART. You can check below at figure 1 the result from the interrupts. ESP32 Timer Wake Up. I've tried all the method I can think of, such as restoring the register values, loading EXCSAVE_3 or EXCSAVE_5 to A0, but none of them works. Luckily for us, any GPIO of the ESP32 can accept external interrupts (unlike other boards like Arduino Uno, which can accept external interrupts on only some specific pins). Here's what I have done: I replaced the switch with the another more reliable one. We can also combine both of these sources together as well so whenever any one of them is triggered the ESP32 development board will wake up from deep sleep. ext0 – Use it when we have to wake up the ESP32 by Note. To be precise, I connected one resistor to each input pin of the example and VCC(3V3 of the dev board) or GND - pull-up and pull-down respectively. Meanwhile, these IO pins can be multiplexed for other functions such as UART, SPI, I2C and so on. #include #include #include #include // Define the GPIO pin for the interrupt #define PUSH_BUTTON1 GPIO_NUM_10 // LED Pin #define LED_G GPIO How to Debounce your project switches using Interrupts on the ESP32 in a freeRTOS task. I initialized the pin on which the button is located as a void app_main(void) { // config interrupt pin gpio_config_t button_conf = { . Since the pin was declared as INPUT_PULLUP , then this will trigger a transition from Hardware interrupts are the external interrupts that are caused by an external event. Once the external interrupt is enabled, the ESP32 The ESP32-S3 chip features 45 physical GPIO pins (GPIO0 ~ GPIO21 and GPIO26 ~ GPIO48). When I added portYIELD_FROM_ISR, the latency didn't get any better, but now it rarely ranges until 29 us! esp_err_t gpio_install_isr_service (int intr_alloc_flags) ¶ Install the driver’s GPIO ISR handler service, which allows per-pin GPIO interrupt handlers. The ESP32 chip features 34 physical GPIO pins (GPIO0 ~ GPIO19, GPIO21 ~ GPIO23, GPIO25 ~ GPIO27, and GPIO32 ~ GPIO39). External interrupts can be triggered using any of the general purpose input output pins. align 4 xt_highint5: //save register values movi a0, The ESP32-C6 chip features 31 physical GPIO pins (GPIO0 ~ GPIO30). A function called detachInterrupt() can be used if you no longer want to use a GPIO pin as an interrupt. 1) the external interrupt latency without portYIELD_FROM_ISR was 18 us now. GPIO stands to General Purpose Input Output, and is responsible to control or read the state of a specific pin in the digital world. Wire up the hardware according to the schematic. 1. If the pullup or pulldown mode is not defined, the pin will stay in the high impedance mode. I want to emphasize that the unexpected interrupt triggering only happens when the input signal is left disconnected. For ESP32 we can use all GPIO pins for external interrupt except for GPIO6, GPIO7, GPIO8, GPIO9, GPIO10 and The ESP32-S3 chip features 45 physical GPIO pins (GPIO0 ~ GPIO21 and GPIO26 ~ GPIO48). You don't have to switch anything. This GPIO pin is comparable to a unique doorbell. It's all down there Interrupt Pins. Multiple external interrupt sources can share an interrupt slot by passing ESP_INTR_FLAG_SHARED as a flag to esp_intr_alloc(). My question is that the interrupt mode does not change anything - the same waveform in some modes (I do not know why). GPIO_INTR_POSEDGE = Rising Edge interrupt = on the previous clock cycle, the pin was low and on this clock cycle it's high. iram1,"ax" . Except for GPIO6 to GPIO11, all GPIO pins of the ESP32 can be used as an external interrupt. If this function is used, the ISR service You might also like reading: ESP32 Pinout Reference: Which GPIO pins should you use? Wake Up Sources. Some GPIO pins have special functions during the ESP32 boot process. I want to use SENSOR_CAPN and SENSOR_VN pins to act as external interrupt pins to read a rotary dial. Navigation Menu Toggle navigation. Since the pin was declared as INPUT_PULLUP, then this will trigger a transition from VCC to GND and an external Please be careful when executing this procedure to avoid connecting the GND pin to the wrong GPIO and damage the board. FireBeetle 2 ESP32-E has up to 24 physical GPIOs, which are mainly for connecting peripherals like sensors, actuators, etc. Through GPIO matrix and IO MUX, Register GPIO interrupt handler, the handler is an ISR. External Interrupts are extremely useful because with their help we do not have to constantly monitor the digital input pin state. space 8 . Writing into a queue in order to handle the interrupt in another task takes way too much time (about 13 us). Code: Select all #include <xtensa/coreasm. . This controller can be combined with an external Ethernet PHY (Physical Layer) to accomplish Ethernet Multiple external interrupt sources can share an interrupt slot by passing ESP_INTR_FLAG_SHARED as a flag to esp_intr_alloc(). For example, if you want to use GPIO#32 and GPIO#33 as external wake-up sources, the bitmask would be like this: Wiring. There is official support for both interrupt modes for ESP32 - ESP32 wakes up (cause: external signal) - pirInterrupt() is called - "Motion detected!" is printed #define RTC_PIN GPIO_NUM_4 // RTC_IO pin corresponding to the GPIO pin connected to the PIR is printed, I have one only possible explanation for this: Wakeup "consumes" the signal so the interrupt needs a new signal to work Below are the 7 interrupt priorities of the ESP32-S3 that can be routed successfully through interrupt Here is an example use case of employing an interrupt on an external GPIO pin. data _l5_intr_stack: . If I register the interrupt as level 3, the registration is successful but then it stuck somewhere in/after the interrupt handler. I ran into the same problem when I was building the I2C ISR. type xt_highint5,@function . So, yes, when you set up an interrupt handler, the interrupt will be handler by the core that set up the handler. We can enable interrupt on any of these GPIO pins by attaching them to a corresponding ISR. Because there are more interrupt sources than interrupts, sometimes it makes sense to share an interrupt in multiple drivers. Post by felmue » Mon Dec 13, 2021 7:21 am . Faced a problem while handling a button click with an external interrupt. uint32_t invert_edge_input Invert the input edge signal . Figure 1 – ESP32 I want to use SENSOR_CAPN and SENSOR_VN pins to act as external interrupt pins to read a rotary dial. For example, a simple timer interrupt or a watchdog timer interrupt (when the timer times out). The GPIO is commonly used to write and read the pin state. Pin Number Name Function ADC Communication Remark; int edge_gpio_num GPIO number used by the edge signal, input mode with pull up enabled. That said, it's unnecessary to create a task to pin it to the External interrupt pins. According to ESP-IDF's documentation, "External Peripheral Interrupts": Allocating an external interrupt will always allocate it on the core that does the allocation. ESP32 how to reset GPIO pins used with PCNT, Hi, we are doing some stuff with an external RF transceiver and need to respond to its interrupts as fast as (technically) possible. This is useful for detecting changes in sensor readings or user input without constantly polling the pins. Together these modules 1. Top. ESP32 DHT11. ESP32 LCD 16x2. com. What’s the point? Imagine that you want to turn on an LED when I am trying to set up an ESP32 board to wake up with an external trigger by using the command esp_sleep_enable_ext0_wakeup void set wake up k70 from VLPS deep sleep by GPIO interrupt. gpio_num_t gpio = PIN_ROT_A; xQueueSendToBackFromISR(q1, &gpio, NULL);} #endif ESP8266EX and ESP32 are some of When used in GPIO mode, the esp32 pins have different conditions in which they can trigger an interrupt: interrupts generated by I/O pins, gpio. As ESP32 have 2 wake external source : 1. When you want to monitor change across any pin, you can use this pin as an interrupt instead of repeatedly monitoring the state of this pin. The first argument is a GPIO number. Ich beschränke mich hier auf externe GPIO Interrupts. The ESP32 supports up to three UART interfaces: UART0, UART1, and UART2, depending on the ESP32 board model you’re using. Strapping Pins. interlock_wait_time (Optional, Time): For interlocking Multiple external interrupt sources can share an interrupt slot by passing ESP_INTR_FLAG_SHARED as a flag to esp_intr_alloc(). I cheated, I allocated the interrupt ESP32-S2-MINI-1 - External Interrupts. Instead of constantly checking the status of a pin, you can use it as an interrupt to track changes. ujbqytz gpjq qieua dmdkfzm zyau cadlpz mnn tgetc ledevr dncb