Use this action for sending mobile-terminated (MT) messages to one or more Hardwares; each Hardware specified will include its own status in the response; you should verify the statuses individually for errors; a status of QUEUED means success, everything else means failure.
Message payload should be suppled hex-encoded (maximum message length 270 bytes). For example, to send the payload "Hello" you should submit 48656c6c6f.
Use Hardware/GetHardwares to retrieve details of Hardware in your account (including IMEI).
The id returned uniquely identifies each message generated, use this to retrieve message submission status via: DataMt/GetMessageStatus
Possible Statuses: QUEUED, ERROR_HARDWARE_UNKNOWN, ERROR_HARDWARE_PERMISSION, ERROR_PAYLOAD_SIZE, ERROR_PAYLOAD_CONTENT, ERROR_TRANSPORT, ERROR_UNKNOWN