Ultrasonic Data Mean of Medians Approach

[okyang]

To ensure reliability of fullness data we want to try implementing this approach.

1. collect 9 fullness data points
2. sort the data points
3. Take the middle 5 values and take the average
4. Return that average as the fullness data

Changing this script: https://github.com/zotbins/waste_watcher/blob/main/v1/smartbin_sensor_module_v1_demo_version/smartbin_sensor_module_v1_demo_version.ino

[okyang]

@DevPopat, are you interested in this?

[patrickanguyen]

For the sorting, highly recommend using a iterative algorithm like insertion sort instead of a recursive one to prevent stack overflow problems