

Initializing Timer Interrupt in ESP32/ESP8266 When we will use the timer in periodic mode, the callback function will be called after every period which we will specify.

The input argument to the timer () method is the ID of the timer which we want to use. We can give any descriptive name to the timer class object such as “timer”.
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How to use ESP32 and ESP8266 Timers in MicroPython?įirstly, we have to import the machine module and from that module, we have to import the Timer class: from machine import TimerĪfter that create an instance of a timer class with an object name. After completing the interrupt service routine, the program returns to the next instruction from where it left off. Like, interrupt handler routines, when a timer interrupts occurs, it stops the sequential execution of the program and performs a task that is attached to a respective time interrupt. For example, we can use a timer interrupt to toggle the LED after every one second. Timers available in ESP boards can also be used to perform a certain task periodically after a certain amount of time. On top of that MicroPython machine class also supports virtual timer for ESP32. MicroPython Timer API supports allf four hardware timers. The timing of these timers depends upon the clock and varies from one board to the other.
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Tim.init(period=5000, mode=Timer.ONE_SHOT, callback=lambda t:print(1)) ESP32 TimersĮSP32 had a total of 4 hardware timers(Timer0, Timer1, Timer2, Timer3) which are all 64 bit based on 16-bit pre-scalers.

We can use the machine.Timer class with timer ID of -1 to use virtual timers. But it provides API for virtual timers (RTOS bases). But one important point to note here is that at the time of writing this article, MicroPython Timer class from machine module does not support Timers of ESP8266. We must use Timer1 as the Timer0 is used by the WiFi. Timers in ESP8266ĮSP8266 has two timers: Timer0 and Timer1. Now first let’s see the number of hardware Timer modules are supported by both ESP32 and ESP8266 boards and their API support in MicroPython. Getting Started with Thonny MicroPython IDE for ESP32 and ESP8266.If you are using Thonny IDE, you can check this getting started guide: ESP32 and ESP8266 GPIO Programming with MicroPython – LED Blinking Example.Getting Started with MicroPython on ESP32 and ESP8266.
