Non-standard security devices that provide inputs to security systems

A security system for detecting and responding to abnormal signal patterns in signals received from non-standard security devices, the security system comprising a communications gateway device that is configured wirelessly communicate with non-standard security devices, wherein the security system is configured to perform operations comprising:

• periodically receiving, by the communications gateway device of the security system and from each non-standard security device of a set of one or more non-standard security devices, a respective wireless signal that indicates a presence of a respective non-standard security device relative to the communications gateway device;
• in response to receiving the wireless signal from the non-standard security device, recording wireless signal data in a data structure that is accessible by the communications gateway device, wherein the wireless signal data comprises (i) an identifier of the non-standard security device, (ii) a signal strength of the wireless signal, and (iii) a timestamp;
• determining a regular signal pattern of the set of one or more non-standard security devices over time;
• periodically analyzing, by the communications gateway device, the wireless signal data to determine whether a current signal pattern of the set of one or more non-standard security devices conforms to the regular signal pattern or whether the current signal pattern indicates an abnormal signal pattern of the set of one or more non-standard security devices;
• and
• in response to determining that the current signal pattern indicates the abnormal signal pattern, performing, at least one predetermined action.