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duff2013 / Snooze

Teensy Low Power Library
MIT License
134 stars 37 forks source link

Teensy does not run when power is applied from battery #102

Closed pm-56 closed 3 years ago

pm-56 commented 3 years ago

I have an issue where my program will not run when power is applied from a battery via the USB port while the Teensy is in sleep or deepSleep mode. If I plug it into a computer, it runs as expected. If I load the default blink program, plugging the Teensy into the battery runs the program as expected.

So I am not sure exactly what I am missing. I currently use the Alarm, USB, and Digital drivers. Normally I want the Teensy to wake every 30 minutes, read some sensors, and go back to sleep (for testing purposes I am using a 15s timer). This all works fine when it is plugged into a computer. I tried adding a digital driver to wake the Teensy up from a button press, to force it to wake up regardless of the timer, but this still only works when it is connected to a computer, not to a battery.

Is there something else I need to listen for to get the Teensy to wake when plugged into a battery?

pm-56 commented 3 years ago

Nevermind, issue was a while (!Serial); causing it to hang