[aprssig] APRS-IS bidirectional

[Karl W4KRL]

I'm developing an ESP32/Arduino device to read APRS-IS packets. Using the
Client UDP information from www.aprs-is.net, I connect to first.aprs.net on
TCP port 10152 and UDP port 8888. I send the logon string to the TCP port
and listen on both TCP and UDP. I get a "verified" from TCP and a ping
every 20 seconds but never receive anything from UDP. See the results
below.

What am I doing wrong?

*73 Karl W4KRL*

*​​*
[What I send. *What I *
*receive.*
]


user W4KRL-3 pass
​****
 vers D1M-WX1 2.0 UDP 8888 filter r/38.6/-77.5/50
*​​# javAPRSSrvr 4.2.1b10*
*# logresp W4KRL-3 verified*

W4KRL-3>APRS,TCPIP*:W4KRL-9  :Hello from APRS-IS
W4KRL-3>APRS,TCPIP*?IGATE?
*​​, server FIRST UDP*

[every 20 seconds this appears on the TCP port]

*# javAPRSSrvr 4.2.1b10 2018-04-05T22:11:31.803Z FIRST 10152*
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