Il giorno 22 apr 2020, alle ore 14:59, Andrew P. <andrewemt@...> ha scritto:

First off, is your digipeater a digipeater-plus-I-gate, or just a digipeater? Since your iPhone is not a transmitter on ham bands, the only way your Internet-originated APRS packets are going to get to amateur-band RF is via somebody's transmit-capable I-gate. If you don't have a transmit-capable I-gate in the neighborhood, no one is going to put your Internet packets on RF.

Secondly, I-gates (and the APRS-IS backbone servers) have some logic within them to keep from flooding the local RF channel with excess traffic. Unless explicitly configured otherwise at the I-gate, traffic will not be sent from the Internet to the I-gate for retransmission on RF unless:

1. the APRS packet is a text message addressed to an RF station reported to the backbone as being heard by that particular I-gate.
2. the APRS packet is a position report from an Internet-relayed station that has just sent a text message meeting rule#1 (so the text message recipient can see where the message sender is located).

This is what keeps transmit-capable I-gates from saturating the RF channel with spurious traffic.

And the APRS-IS does not know that a connected station is _not_ an I-gate. If it is connected to APRS-IS, then it will be treated like an I-gate, and therefore the rules for sending traffic to an I-gate apply in every backbone server. Traffic is only forwarded to the connected station if rule#1, rule#2, or an explicit filter specification would pass the traffic. And a proper I-gate should enforce the rules too, in case somebody floods the APRS-IS with spurious traffic, or a filter is specified on the connection to APRS-IS. This is why YAAC has the supplemental filter to force additional traffic to RF (above and beyond rule#1 and rule#2 traffic); this capability should be used very carefully and cautiously, as the the RF channel doesn't have much bandwidth.

So, send more than just a beacon from your iPhone. Remember, one of the fundamental regulations of amateur radio is that it is two-way communications. Telemetry is an allowed but secondary purpose of amateur radio.

Andrew, KA2DDO
author of YAAC

Il giorno 22 apr 2020, alle ore 18:48, Andrew P. <andrewemt@...> ha scritto:

Again, the reason you're not seeing the iPhone in YAAC is that:

1. No I-gate station (including yourself) is going to transmit it to RF because the iPhone isn't sending any packets meeting rule#1 or rule#2 (position _after_ a rule#1 text message).

2. The APRS-IS backbone won't send it to your local station because of the same rules, since you are not specifying a filter to cause additional packets to be forwarded that don't meet rule#1 and rule#2.

Basically, if you want to monitor traffic on the APRS-IS (instead of just being a minimal-traffic I-gate), you have to specify a APRS-IS port filter expression to include the additional traffic. Note that YAAC does implement the I-gate rules, so it won't forward to RF unnecessary extra Internet traffic caused by filters unless you also specify a supplemental Tx I-gate filter.

Andrew, KA2DDO
author of YAAC

________________________________________
From: yaac-users@groups.io <yaac-users@groups.io> on behalf of Elia Origoni <elia.origoni@...>
Sent: Wednesday, April 22, 2020 12:17 PM
To: yaac-users@groups.io
Subject: Re: [yaac-users] No mobile APRS in YAAC

Hi,
Is a digipiter plus I-Gate configured in wide1-1.
I have the pi-tnc interface and APRS-IS interface.
I don’t want to repeat my smartphone beacon trough RF.
I only want to understand why I don’t see the beacon icon of my smartphone on the map in YAAC…with all filter disabled, I don’t have to see the same things that I can see on aprs.fi<>?

Elia, IU2JWM

Il giorno 22 apr 2020, alle ore 14:59, Andrew P. <andrewemt@...<mailto:andrewemt@...>> ha scritto:

First off, is your digipeater a digipeater-plus-I-gate, or just a digipeater? Since your iPhone is not a transmitter on ham bands, the only way your Internet-originated APRS packets are going to get to amateur-band RF is via somebody's transmit-capable I-gate. If you don't have a transmit-capable I-gate in the neighborhood, no one is going to put your Internet packets on RF.

Secondly, I-gates (and the APRS-IS backbone servers) have some logic within them to keep from flooding the local RF channel with excess traffic. Unless explicitly configured otherwise at the I-gate, traffic will not be sent from the Internet to the I-gate for retransmission on RF unless:

1. the APRS packet is a text message addressed to an RF station reported to the backbone as being heard by that particular I-gate.
2. the APRS packet is a position report from an Internet-relayed station that has just sent a text message meeting rule#1 (so the text message recipient can see where the message sender is located).

This is what keeps transmit-capable I-gates from saturating the RF channel with spurious traffic.

And the APRS-IS does not know that a connected station is _not_ an I-gate. If it is connected to APRS-IS, then it will be treated like an I-gate, and therefore the rules for sending traffic to an I-gate apply in every backbone server. Traffic is only forwarded to the connected station if rule#1, rule#2, or an explicit filter specification would pass the traffic. And a proper I-gate should enforce the rules too, in case somebody floods the APRS-IS with spurious traffic, or a filter is specified on the connection to APRS-IS. This is why YAAC has the supplemental filter to force additional traffic to RF (above and beyond rule#1 and rule#2 traffic); this capability should be used very carefully and cautiously, as the the RF channel doesn't have much bandwidth.

So, send more than just a beacon from your iPhone. Remember, one of the fundamental regulations of amateur radio is that it is two-way communications. Telemetry is an allowed but secondary purpose of amateur radio.

Andrew, KA2DDO
author of YAAC