Answer
Many thanks for your interest in our products. The Ezurio (formerly Laird Connectivity) AT Interface implementation for both Lyra (22) and 24 series is closed source and proprietary, hence, we do not share any source code. This also applies to Wireless Xpress which was developed and released by Silicon Labs.
There are currently no plans to make any source files available to the public nor to open source our software projects on GitHub. For more details or individual requests, please reach out to your local sales representative or FAE at Laird.