Determining operational state with tags

A system comprising:

• a first electrical circuit, comprising:
• a switch configured to be in a first state in response to a magnet not being proximate to the switch, and a second state in response to the magnet being proximate to the switch;
• a first radio frequency identification (RFID) tag configured to transmit a first RFID identifier;
• and
• a second RFID tag configured to transmit a second RFID identifier, wherein the first RFID tag is configured to be activated in response to the switch being in the first state, and the second RFID tag is configured to be activated in response to the switch being in the second state;
• and
• a second electrical circuit movable with respect to the first electrical circuit and configured to energize the first electrical circuit in response to being in proximity to the first electrical circuit, wherein energization of the first electrical circuit indicates a positional state of a first object and respective activation of the first RFID tag and the second RFID tag indicates respective positional states of a second object, and wherein the first object is a gate and the second object is a shaft in a locking mechanism.