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SmartOne C User Manual
Confidential & Proprietary Information
9100-0410-01 R2.4
TYPE 2 MESSAGE CLASS
RAW MESSAGE TYPE – SINGLE PACKET VERSION
Message type 2 shall be a Raw Payload message. This message type provides for up to 8 bytes plus 6 bits of
user data. This mode is provided to enable the user to directly send a single data burst through the network. The
only bits not accessible to the user are the message type bits needed by the receiving data processor to delineate
message type associated to the transmit ID. User data less than the full payload will be zero padded as necessary.
The Raw Payload message will follow the following on-air format:
RAW MESSAGE TYPE – MULTIPLE PACKET VERSION
The Globalstar Commercial IoT messaging protocol provides for single and multiple packet messaging. In the event
that the user application requests a user data length exceeding 9 bytes, the SmartOne (running firmware version
2.1 or later) will automatically “packetize” the message, that is, transmit it as multiple 9 byte packets. The ground
station appliqué will reverse the process, “de-packetizing” the message back into a single (“long”) message. From
the user application point of view, this eliminates the 9 byte limitation allowing the user to compose longer messages
transparently. They are presented to the user by the Globalstar back office as complete messages of a length longer
than 9 bytes. The SmartOne supports user-defined messages (Class 1 and 2) of up to 54 bytes.
Message type 2 shall be a Raw Payload message. This message type provides for up to 53 bytes plus 6 bits of
user data. This mode is provided to enable the user to directly send a single data burst through the network. The
only bits not accessible to the user are the message type bits needed by the receiving data processor to delineate
message type associated to the transmit ID. User data less than the full payload will be zero padded as necessary.
NOTE:
Total message length will be a minimum of 9 bytes in length, and a maximum of 54 bytes in length, and the
length sent to the user will always be divisible by 9
The Raw Payload message will follow the following on-air format:
VARIABLE
BITS
DESCRIPTION
STATUS BYTE
8
Bit (1:0) = 2 = Raw message type
Bit (7:2) = submask data from Raw Payload user data
USER DATA
VARIABLE
Byte 1 = User data byte 1
Byte 2 = User data byte 2
Byte 3 = User data byte 3
Byte 4 = User data byte 4
Byte 5 = User data byte 5
Byte 6 = User data byte 6
Byte 7 = User data byte 7
Byte 8 = User data byte 8
VARIABLE
BITS
DESCRIPTION
STATUS BYTE
8
Bit (1:0) = 2 = Raw message type
Bit (7:2) = submask data from Raw Payload user data
USER DATA
VARIABLE
Byte 1 = User data byte 1
Byte 2 = User data byte 2
Byte 3 = User data byte 3
…..
…..
Byte 53 = User data byte 53
