<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body>Oops. Sent this to the wrong email address.<div><br></div><div>The APRS protocol specification defines directed query messages, including the message ?APRSP (respond with current position report). Of course, this only works if all of the below conditions are met:</div><div><br></div><div>1. The target station can receive APRS messages (i.e., not a one-way tracker).</div><div><br></div><div>2. The text message can be routed to the target station (proper digipeat path or Tx I-gate near the target station, as appropriate).</div><div><br></div><div>3. The target station's APRS software or firmware actually implemented proper handling of the ?APRSP directed query. </div><div><br></div><div>Good luck.</div><div><br></div><div>Andrew, KA2DDO</div><div>author of YAAC (which does support ?APRSP)</div><br><br>-------- Original message --------<br>From: Bill Vodall <wa7nwp@gmail.com> <br>Date: 3/20/17 2:57 PM (GMT-05:00) <br>To: K1LPI <k1lpi@yahoo.com> <br>Cc: aprssig@tapr.org <br>Subject: Re: [aprssig] Auto-response position reports <br><br>> Is there a way to interrogate an APRS radio to send it's position in<br>> response to a message or "ping" from a another station? In effect, a<br>> "transponder" mode. I was thinking a message followed by an automatic reply<br>> message might work but I don't see how to include the surrent position in<br>> the reply message.<br><br>Look at the various responder options configured by the SMSGTE system,<br> That's on the final section of this page:<br><br> http://smsgte.wixsite.com/smsgte/userguide<br><br>SMSGTE itself my be useful for you.<br><br>There's also working to fix the APRS system so less packets are lost..<br><br>73<br>Bill, WA7NWP<br>_______________________________________________<br>aprssig mailing list<br>aprssig@tapr.org<br>http://www.tapr.org/mailman/listinfo/aprssig<br></body></html>