Command Group 0X04 - Auxiliary Uart (Auxiliary Ports Only, Extended Commands Only) (Mdynamo Gen I Only); Extended Command 0X0400 - Auxiliary Uart Transmit Data - Magtek mDynamo Programmer's Manual

7 - Commands
7.5 Command Group 0x04 - Auxiliary UART (Auxiliary Ports Only, Extended
Commands Only) (mDynamo Gen I Only)
The host uses the commands in this section to control its auxiliary UART port, which enables customers
to implement solutions where an external UART device, such as magnetic stripe reader or contactless
reader, can communicate with the host by piggybacking on the device's connection to the host.
If the device is not connected to the host using UART, the device automatically converts between UART
and the device/host connection type. This conversion may introduce data propagation delays and
buffering limitations. MagTek advises thoroughly testing external devices with the auxiliary port to make
sure they are completely compatible.
To configure the behavior of the auxiliary UART port, use Property 0x69 - Auxiliary UART
Configuration (Auxiliary Ports Only).

7.5.1 Extended Command 0x0400 - Auxiliary UART Transmit Data

Like all extended commands, the host initiates this command by calling Command 0x49 - Send
Extended Command Packet (Extended Commands Only), and receives a response as documented
there.
The host uses this command to transmit data to the device's auxiliary UART. When the external UART
device sends data to the device, the device passes the data to the host using Notification 0x0400 -
Auxiliary UART Received Data.
Table 7-43 - Request Data for Extended Command 0x0400 - Auxiliary UART Transmit Data
Offset Field Name
0 Port Identifier The identifier of the port to transmit on. Always set this field to zero.
1..n Transmit Data
Response Data: None
Result codes:
0x0000 = Success
0x0481 = Port not opened
Example Request (Hex)
Command Number
Data Length
Extended Data Offset
Extended Command Number
Complete Extended Data Length
Extended Data
mDynamo| OEM Secure Card Reader Authenticator | Programmer's Manual (COMMANDS)
The data to transmit. If the length of the data to be transmitted exceeds 1023
bytes, the host must transmit it using multiple commands.
Header
49
0A
Data
00 00
04 00
00 04
00 31 32 33
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Value