ESP8266 Community Forum

In the software you can have multiple timers. The ESP OS is a sort of real-time operating system, that's why there's no main(); everything is a task that is queued up to be done in turn. I don't know the limit for these... might be something like 8 or 16 separate timers running. Hey, it's just a $4 chip!

eriksl wrote:It looks like there actually is only one timer available (I guess others are used for wlan etc).

Cheers, would you mind telling where you found this info?

IIRC the sdk only gives access to one timer anyway.

But that doesn't need to be a problem. If the timer runs fast enough, it can be used to emulate several timers in software.

there is another timer from the chip, look for Timer0 in the github esp8266\Arduino source for how to access it. It isn't configurable other than setting the compare register to trigger the interrupt. It is what I used to implement the Servo library.