The Security Industry Association (SIA) has released version 2.2 of SIA Open Supervised Device Protocol (OSDP), an access control communications standard developed by SIA to improve interoperability among access control and security products.
SIA OSDP version 2.2 features the messages and formatting that were included in the International Electrotechnical Commission (IEC) 60839-11-5 standard released earlier in 2020 and addresses some of the minor errata within that document. SIA OSDP version 2.2 replaces version 2.1.7 of the specification, released in 2015.
