Sam Schrader focused on stabilizing CoAP-related connectivity tests for the thingsboard/thingsboard-edge repository, addressing a key bug by refining the DeviceConnectivityControllerTest. He introduced a new default CoAP device profile instance and explicit transport configuration, ensuring the test environment accurately reflected production setups without altering functional behavior. Through careful refactoring of test variable names and replacement of test data, Sam improved code readability and maintainability, which reduces onboarding time and potential errors. Leveraging Java and skills in backend development, refactoring, and unit testing, his work enhanced test clarity and CI reliability, laying a foundation for more robust CoAP support in future updates.