开云体育

Hello,

Thank you for creating and maintaining this project, it is far better than Xastir!

I am trying to use an external message port to interface with a python script the will send DMR SMS messages to APRS, and the other way around.
I have successfully created a python script that opens a socket to the external message server, which is in "src>dst:message" mode. YAAC is receiving and re-transmitting packets. However, I notice when they show up in APRS.fi, they are formatted as "SOURCE>DESTINATION,PATH:MESSAGE". When sent over RF, my TH-D72 is not receiving the message packet, but can see the packet digipeated. I have noticed that other messages from YAAC interface, APRSdroid, etc. follow "SOURCE>PATH,DESTINATION:MESSAGE" format. I have played around with the path settings in the external message port, but the destination call is always before the path. Maybe I am doing something wrong, or could it be a bug?

I really appreciate YAAC, and the fact it has the ability to interface with other scripts.

Thank you for your time.

KF7EEL
Eric C

Bear in mind that the src and dest fields in the externally-supplied APRS packet (not just a text message) are the values to be placed in the AX.25 sender and destination address fields in the AX.25 packet. This is _not_ the format for command-mode TNC-2 or for APRS-IS packet transmission and reception. If you choose not to specify these, the callsign-SSID of your transmitting port will be the sender (possibly different if you have multiple radio ports for a cross-band digipeater), and whatever tocall you have selected for YAAC (defaulting to APJYC1) will be the AX.25 destination. Note that externally-supplied packets will get the default digipeat path defined by your YAAC configuration (defaulting to WIDE1-1,WIDE2-1); you cannot control this from the external application, but can configure it inside YAAC. Also, after the colon terminating the destination field, the remaining text has to be a valid APRS packet as described in the APRS 1.0.1 Protocol Specification document (such as starting with ! for a position report, or : [again] to indicate a text message with an addressee). So if you are trying to send an APRS text message and you don't have two colons in a row, and then another colon after the addressee callsign, it won't work.

I presume you're using the "src>dst:text" format because you want a different callsign in the sender field than your station callsign. If your regular station callsign and tocall are acceptable, you can use just the format of a plain-text APRS packet without the "src>dst:" prefix. Unless you're acting as a proxy for another station, "src>dst:" probably shouldn't be used, but I assume you need to do that so that SMS messages can come back to the designated DMT station.

Hope this helps.

Andrew, KA2DDO
author of YAAC

Yes, that helped. I now have YAAC sending messages.

Thanks for your help!

KF7EEL
Eric C