about Timers and relaunching (IDFGH-12883)

[diplfranzhoepfinger]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

using this:

https://github.com/diplfranzhoepfinger/esp_timer_example

it is the Example:

https://github.com/espressif/esp-idf-cxx/blob/main/examples/esp_timer_cxx/main/esp_timer_example.cpp

and modify it like this:

        timer.start(chrono::microseconds(200 * 1000));
        this_thread::sleep_for(std::chrono::milliseconds(550));
        timer.start(chrono::microseconds(200 * 1000));

and it works, the Timer can be started 2 times.

but in another Application i get this:

Exception with error: 259 ESP_ERR_INVALID_STATE
ESP_ERR_INVALID_STATE if the timer is already running

[igrr]

and it works, the Timer can be started 2 times.

I think it makes sense, because the timer is first started for 200 ms, so after a 550 ms delay, it is not running. Hence, we can start it again without getting an error.

If you want to start an already-running timer, you first need to call esp_timer_stop to cancel it.

[diplfranzhoepfinger]

this is my Error.

i wanted to test a Timer started 2 times which is still running.

[Dazza0]

@diplfranzhoepfinger Closing this issue as it's not a bug. ESP Timer start APIs are designed to return ESP_ERR_INVALID_STATE if the timer is already running.