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MCP Responses From Serial Adapter
This section describes the format of MCP response messages
passed from the Serial Adapter to an External Computer.
Data Packet Received
Purpose: This is the message used by the Serial Adapter to deliver
packets to the External Computer which have been received by
the Serial Adapter over the radio.
Message Format:
BYTE response (ASCII ‘d’, 64H)
BYTE rssi ;Radio signal strength of received
:packet
BYTE pinstat ;RS-232 pin status of sending node
BYTE len H ;Length of the user message
BYTE len L
BYTE srcaddr H ;IP Address of source
BYTE srcaddr 3
BYTE srcaddr 2
BYTE srcaddr L
BYTES user message
Status Indication of Transmitted Packet
Purpose: This message informs the External Computer of the
status of the most recent data message sent to the Serial Adapter
with the Transmit Data Packet command. The response contains a
duplicate of the sequence number provided in the original Trans-
mit Data Packet message, as well as the length and destination
address. In addition, a StatusInd code is provided which indi-
cates whether the message was sent successfully to the TCP/IP
stack or not.