Garmin GPS35 is a GPS pod with serial connection carrying NMEA data.
They are supplied with a range of connectors, and for use with APRS systems, one may want to replace the connector with the common DE-9 wiring for trackers. Continue reading Garmin GPS35 DE-9 (F) wiring
In earlier articles I documented a trial of aprx v2.08r593:
Encouraged by Kenneth Finnegan who merged some fixes by WB4XO (which still didn’t work properly), I set about resolving some problems.
Above is the RPi sitting on a TNC-X KISS TNC connected to the TNC’s USB port. In this case, aprx uses the supplied KISS interface, it does not use Linux kernel support for AX.25. Continue reading Headless aprx APRS server
This article documents a line-up procedure for the MFJ-1270B TNC. This is an advanced procedure, you should not tackle it without appropriate knowledge and experience. Continue reading MFJ-1270B TNC alignment
APRS has had problems since its inception, and it is not surprising… but the future of APRS has arrived. Continue reading The future of APRS is here…
Towards a reliable APRS iGate discussed efforts to implement a robust and reliable APRS iGate / digi. The article ended by mentioning further work on initialisation scripts. Continue reading Towards a reliable APRS iGate – #2
I have been investigating ‘lost APRS packets’, a result of many root causes.
One is a perception that when I drive in the local area, I often do not hear my own digi ‘echo’ yet I find that it did receive a packet and submit it to APRS-IS. This problem is much more apparent using a TNC-X that with any other KISS TNC in its place. Continue reading TNC-X – channel access behaviour
During recent evaluation of a range of APRS servers and TNCs, I have inspected APRS-IS records and my own server logs to identify possible anomalies caused by the equipment under test.
In that time I have found defective records caused by digi / iGates: VK2JMA-5, Vk2YGV-5, VKWUWP-2, VK2UWP-1, VK2MPJ-1,VK2ZEN-5, VK2AMW-1, VK2RHR-1, VK2LKH-1, VK2MB-1, VK2BEN-1. Continue reading Does anyone assess to their digi / iGate performance?
An APRS iGate necessitates some form of computer in the centre of the configuration.
Over recent weeks, I have evaluated a number of configurations for VHF based on Windows and Linux (RPi) to assess their reliability, though it is doubtful that a configuration to rival UIDIGI reliability and availability is likely. Continue reading Towards a reliable APRS iGate
APRS is characterised by a lack of standards or guidance, but mostly by a lack of compliance with those standards and a lack of understanding and common sense.
VK2UWP is travelling around the countryside and from the look of it, setting up a WIDE2 digipeater in the local caravan parks without regard to its dysfunction. Continue reading The mobile APRS W2 digi left town this morning
A very quick trial of aprx v2.08 was concluded in less than 24 hours. Continue reading Headless aprx server – trial wrapup