Please review the EMDK for C located at: https://portal.motorolasolutions.com/Support/US-EN/Resolution?solutionId=88171&redirectForm=search&searchQuery=%3FsearchType%3Dsimple%26searchTerm%3Demdk
I am using it for scaning and RFID.
But I could not find out how to detect the button press and release.
Using the scan API the API manages the SCAN button.
But if I want to control this myself, receive a message or event, how do I do it? I could did not find that part on the EMDK documentation.
take a look at the Resource Coordinator API in our EMDK for C, I think that RCM_RegisterTriggerMessage can help you.
There's a sample in the EMDK that show how to use it.