HTTP string: Send from AlphaCom

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HTTP GET can be sent to third-party systems using EDO ports and Event Handler.


Set up EDO port

In AlphaPro select Exchange & System > Serial Ports, and select the EDIO port to configure.

Port-Type: TCP/IP Client
IP-Address: destination IP
Port: destination port, usually 80 when HTTP.
Keep-Alive: off


Create Event

Use EDO command to send HTTP GET on the configured port.

Example using DAK 1 to send HTTP GET:

EDO 1 "GET /triggerevent?variable1=test1&variable2=test2 HTTP/1.1\r\nHost:\r\nConnection: Keep-Alive\r\n"
EDO 1 "Accept: */*\r\n\r\n"

A string generated by the EDO command can contain maximum 128 characters. If the http string exceeds this length, one can simply use multiple EDO commands.

Example: Control PTZ on an Axis camera

Example scenario: Every time DAK 1 is pushed on intercom station 179 you want to pan an Axis camera with IP address 10 degrees to the left. Pushing DAK 2 should pan the camera 10 degrees to the right.

Each EDO port can control one camera. There are 10 EDO ports, so in total one can control up to 10 cameras using the method described in this article.

HTTP commands used by Axis

  • Relative pan: 10 degrees right
  • Relative pan: 10 degrees left

EDIO port configuration

EDIO port #1 configured to send commands to camera

Event configuration

Station 179 presses DAK 1 (= Sub Event 1):

DAK 1 press will send http command to camera to pan 10 degrees to the left

Action strings:

EDO 1 "GET /axis-cgi/com/ptz.cgi?rpan=-10 HTTP/1.1\r\n"
EDO 1 "Accept: */*\r\n\r\n"

Station 179 presses DAK 2 (= Sub Event 2):

DAK 2 press will send http command to camera to pan 10 degrees to the right

Action strings:

EDO 1 "GET /axis-cgi/com/ptz.cgi?rpan=10 HTTP/1.1\r\n"
EDO 1 "Accept: */*\r\n\r\n"