Automatic discovery of endpoint devices

A system comprising:

• a network switch;
• a power-over-Ethernet (POE) injector coupled to the network switch and to endpoint devices to pass data and current to each of the endpoint devices;
• a first endpoint device of the endpoint devices, the first endpoint device coupled to the POE injector to receive data and current from the POE injector over a first cable, the first endpoint device varying current drawn from the POE injector by the first endpoint device according to a first sequence;
• a second endpoint device of the endpoint devices, the second endpoint device coupled to the POE injector to receive data and current from the POE injector over a second cable, the second endpoint device varying current drawn from the POE injector by the second endpoint device according to a second sequence;
• memory storing data associating a first identifier with the first sequence and a second identifier with the second sequence;
• and
• a controller configured to:
• determine, using the data, the first identifier of the first endpoint device based at least in part on the first sequence;
• send, to the first endpoint device, a first instruction to at least one of power on or power off;
• determine, using the data, the second identifier of the second endpoint device based at least in part on second sequence;
• and
• send, to the second endpoint device, a second instruction to at least one of power on or power off.