Getting InternalServerError 500 instead of Bad Input 400 when trying to set a device resource value with some wrong/invalid parameter in PUT handler of service's command request.

Relevant Package [REQUIRED]

We are facing this with our customized service when trying to update/set a device channel resource value with the wrong/invalid parameter. We want to return the 4xx code, due to an invalid data set by the client. But no provision to return the other code except 200/500 in the PUT handler of the service's device command.

Description [REQUIRED]

We are currently getting "InternalServerError, 500" when trying to set a device resource value with some wrong/invalid parameter. The expected error with the status code should be "Bad Input, 400".

We observed that there is only provision to return 200(True) or 500 (False) errors, the "edgex-sdk-c" should be improved to return a REST standard error code 4xx,

Start with the service's device-command PUT handler in edgex-sdk-c and trace how invalid parameters are converted to the handler's success or failure result. Define and verify the 400 response for client-invalid input while preserving the existing 200 and 500 behavior for other outcomes.

Written by the indexing model from the issue text.