ESP32 Forum

I am attempting to upgrade some code written with the older Timer library for the esp32 2.17.0 Arduino library that looks something like this:

```
askRequestTimer = timerBegin(0, 80, true);
timerAttachInterrupt(askRequestTimer, &onAskReqTimer, true);
timerAlarmWrite(askRequestTimer, 5*1000000, true);//send out an ask every 5 secs
timerAlarmEnable(askRequestTimer);

askExpireTimer = timerBegin(1, 80, true);
timerAttachInterrupt(askExpireTimer, &onAskExpireTimer, true);
timerAlarmWrite(askExpireTimer, expireLength*1000000, true);
timerAlarmEnable(askExpireTimer);
timerStop(askExpireTimer);
```

Give the changes outlined here https://docs.espressif.com/projects/ard ... o_3.0.html, timerBegin and timerAlarm have been updated, so I'm trying to reflect those changes.

This is what I currently have:

```
askRequestTimer = timerBegin(80000000); // 80MHz
timerAttachInterrupt(askRequestTimer, &onAskReqTimer);
timerAlarm(askRequestTimer, 5 * 1000000, true, 0); //send out an ask every 5 secs

askExpireTimer = timerBegin(80000000);
timerAttachInterrupt(askExpireTimer, &onAskExpireTimer);
timerAlarm(askExpireTimer, expireLength * 1000000, true, 0);
timerStop(askExpireTimer);
```

I'm wondering if this is equivalent? Or if someone could provide advice on how to update the code?

Thank you!

What are you doing that needs the precision of the hardware timers? If you are running something once a second, use Ticker or a FreeRTOS timer.
If you do need to use the hardware timer, use a single timer running at 1MHz and attach multiple alarms to that timer (at the appropriate intervals).