Patent ID: 7861083

Claim:
A method of transmitting a message from a security device to a receiving device comprising the steps of: a. forming, the security device, a two-part data message comprising a first message part and a second message part, wherein the security device transmitting the message through a wireless link, i. the first message part comprising 1. a preamble portion, 2. an identification number portion that uniquely identifies the security device, 3. a status portion that comprises status data indicative of the status of the security device, and 4. a cyclic redundancy check portion that contains cyclic redundancy check data based on a cyclic redundancy check function performed on the identification number portion and the status portion, and ii. the second message part comprising a first sequence count and a second sequence count, the second sequence count has the same information as the first sequence count but is the logical inverse thereof where the first and second sequence counts are analyzed with respect to each other to ensure data integrity of the two-part data message; b. encoding within encoding circuitry the first message part in a first encoding format; c. encoding the second message part in a second encoding format different from the first encoding format; d. modulating a carrier signal with the encoded first message part and the encoded second message part; and e. wirelessly transmitting the modulated carrier signal to the receiving device.