Connecting the Seam Bridge to DoorKing
Learn how to connect your DoorKing unit to Seam.
The Seam Bridge can be used to connect traditionally-offline devices to Seam. This guide will walk you through connecting your DoorKing unit to Seam via the Bridge.
First, wire the provided 5-pin terminal block to the DoorKing unit’s RS232 header. This can either be done via a DB9 cable (recommended) or directly between the two systems.
The DoorKing RS-232 header is located at the top left of the board.
From top to bottom, the pin order is:
- 1.
TX
- 2.
RX
- 3.
RTS
- 4.
CTS
- 5.
GND
The Seam Bridge RS-232 connector is located at the top left of the board, when the Ethernet port is facing to the right.
From top to bottom, the pin order is:
- 1.
GND
- 2.
TX
- 3.
RX
- 4.
RTS
- 5.
CTS

Seam Bridge pinout
If connecting a Bridge to a DoorKing unit without a DB9 cable, these are the connections that need to be made from the Seam Bridge → DoorKing:
- 1.
GND → GND
- 2.
TX → RX
- 3.
RX → TX
- 4.
RTS → CTS
- 5.
CTS → RTS
The Seam Bridge requires that the unit is configured for
19200
baud rate. This can be done by:- 1.Entering
* 8 5 <master code>
- 2.Entering
1
to select19200
- 3.Pressing
0
and#
together to finish the programming sequence
- 1.Plug in Ethernet
- 2.Connect power. You can either use the provided 12V DC adapter or connect the Seam Bridge to any 9-36V AC or DC power source.
Ask Seam support to enable the Bridge by emailing
[email protected]
or going to seam.co and clicking the chat icon in the bottom right corner.