Sunday, February 10, 2019

-DMR hotspot operational

TP-Link TL-WR802N (Travel Wifi AP router) and SharkRF openSPOT 1
Local digital radio internet gateway. 20 mW max output (UHF)

(radio) <-> (openSPOT) <-> (worldwide DMR networks via internet)

-APRS troubleshooting. Anytone 878UV

Anytone AT-D878UV as heard by rtl-sdr+gqrx. Garbled coordinate data in APRS position transmission causes it to be ignored by receiving stations.

A second example showing other stations' APRS traffic for comparison

Update 2/27: Found some information here leading me to a solution for the APRS issue.  Below is a screenshot of my 878 APRS settings which have resolved the unintelligible transmission problem:

Take note of the time delay settings (with red dots) as well as the lack of a coma in "APRS signal path".  These changes resulted in my APRS transmissions clearing up and finally showing up on


Update 2020: Updating the CPS and radio firmware to the latest (and matching) versions seems to have eliminated the above issues.  Through the last year I have been using the 878 with to transmit my position in a number of challenging outdoor environments and it has performed and held up well.  Looking forward to APRS messaging capability in the future.

Anytone AT-D878UV DMR & Analog VHF/UHF radio