Portable security bin

A portable security bin comprising:

• a closed, lockable enclosure;
• a receiving slot in the enclosure that receives secure material;
• a contents height sensor that measures a height of the secure material in the enclosure;
• and
• an electronic bin controller, comprising:
• a short-range radio;
• a long-range radio;
• a processor;
• non-volatile memory;
• a non-volatile bin controller ID;
• a time-base;
• wherein the electronic bin controller:
• periodically monitors, at a first time interval, the height of the secure material;
• periodically listens, at a second time interval, to receive, via to the short-range radio, a first radio beacon, wherein the first radio beacon comprises a first broadcast radio ID;
• determines a first bin-distance, wherein the first bin-distance is a distance between the bin and a first broadcast radio, responsive to the short-range radio;
• selects one of three mutually exclusive bin security states:
• (a) a home state, (b) a caution state, or (c) a warning state;
• responsive to the first bin-distance;
• sends a bin-security message, via the long-range radio, responsive a change in the security state, comprising the bin security state;
• and
• periodically transmits, at a third time interval, a bin-status message, comprising:
• (a) the bin controller ID, (b) the first broadcast radio ID, and (c) the height of the secure material;
• and
• wherein the bin controller is affixed to the enclosure.