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`Too many arguments to function hw_timer_t - Arduino Forum

Fri, 03 Apr 2026 14:48:00 GMT

too many arguments to function 'hw_timer_t* timerBegin (uint32_t)' 528 | timer = timerBegin (0, 80, true); // Alarm value will be in in us it looks like you are attempting to build code using ESP32 core 3.x which was implemented for ESP32 core 2.x have a look at the ESP32 core V3.x Arduino-ESP32 Timer API also worth looking at is Migration from ESP32 core 2.x to 3.x

How to select a timer in ESP32 Arduino API 3.0

Tue, 31 Mar 2026 08:33:00 GMT

Thanks to several real knowledgeable members I'm starting to understand the nuances of esp32 timers. I still has a few question to resolve: In API version 2.0 you selected which 1 of the 4 timers you wanted in "timerBegin(timer#, pre-scaler,count_direction)" now there is only 1 parameter "Frequency". Where do I select the timer number? A second question is what are the allowable frequencies ...

ESP32-C3 Watch Dog Timer (WDT) - Arduino Forum

Fri, 03 Apr 2026 02:03:00 GMT

After many trials (thinking it was to do with the 'Reset WDT' statement), I finally realised that it Wasn't tying up the early #define CONFIG_FREERTOS_NUMBER_OF_CORES 1 statement with the .idle_core_mask = (1 << CONFIG_FREERTOS_NUMBER_OF_CORES) - 1, statement. I just manually Set it to 1 core for the ESP32-C3

Programming timer interruption - Arduino Forum

Sun, 05 Apr 2026 03:33:00 GMT

I'm posting here a simple project to create an interrupt timer on an ESP32 board for version 3.1.1 by Esspressif Systems. I had difficulties to find updated information to make this code, I hope it can be useful to someone ! This code creates an interrupt every 100ms and counts the number of interrupts. There is the code : #include "esp32-hal-timer.h" const int ledPin = 2; // pin of the LED ...

Handling Timer Overflow Interrupts - Arduino Forum

Mon, 30 Mar 2026 06:18:00 GMT

I clear the timer, set it up in Input Capture Mode, set the pre-scaler to ClkIO/1024, and enable Overflow interrupts, as the event I'm timing can take up to 10 seconds, which means the timer may overflow twice. I maintain a software count, in a uint32_t that is increment by 65536 every time an overflow occurs.

[Solved] Timer.h - Programming - Arduino Forum

Thu, 02 Apr 2026 00:23:00 GMT

As you understand I need a hardware timer (counting clock ticks). Millis () makes demanding to ckeck if "old value" is smaller than millis () value (normal run from start until rollover) or greater (1st time after rollover) before any compare.

Start a timer when button is pressed - Arduino Forum

Sat, 04 Apr 2026 05:00:00 GMT

I am creating a timer for a race. I have a photosensor that has a laser pointed to so when someone crosses the finish, it trips the sensor, and the system logs the racer's time. I am using millis() to time the race, but I need the timer to start when I push the button. I have tried using edge detection to start the timer, but the timer starts when the program starts, not when the program ...

Hardware Timer ESP32 Dev Module - Arduino Forum

Thu, 02 Apr 2026 22:35:00 GMT

this is a simple esp32 hardware timer code but i am getting error. can anyone please check the issue.

12VDC timer - Arduino or off the shelf?

Sun, 29 Mar 2026 09:04:00 GMT

A timer is a clock and doesn’t have NO or NC, that is a switch. I suspect you want a relay that you can switch with a microcontroller in response to an input. That is relatively simple to do. Your other specifications and purpose you don’t share so only you will know what you need. Any arduino microcontroller can time things.

Six digit Seven segment display countdown timer - Arduino Forum

Thu, 02 Apr 2026 08:59:00 GMT

Namely, a countdown timer with six seven segment displays that shows the remaining months, days, and hours set by the user via push-buttons. The actual countdown would then be controlled by an RTC module (I read somewhere that the Arduino's internal timer is not accurate for extended time periods).