Changing task frequency "on the fly"

[sukjinkang]

What would be the best way to change a task frequency on the fly? For example, if I wanted to change beaconing interval, how can I do that after the beacon_task has been loaded? I'd like to be able to change the beacon and telemetry collection rate via ground commands, if possible.

[maholli]

All the scheduled task objects are accessible through the cubesat.scheduled_tasks dictionary. The task object has a change_rate function allowing you to change the frequency on the fly.

To test without over the air commands:

• Add the this line: self.cubesat.scheduled_tasks['beacon'].change_rate(1/10) to something like the IMU task (line 38 would work well) to update the beacon frequency from once every 30 seconds to once every 10 seconds.

To test with over the air commands:

• Sure you could hard-code a command into cdh.py, but an easier option would be to use the OTA exec_cmd. Following the example here, it might look like this:

  elif CHOOSE_CMD == 'exec_cmd':
      cmd += b"cubesat.scheduled_tasks['beacon'].change_rate(1/10)"

Having the flexibility to use exec opens limitless possibilities 😄