Many customers want to know how to set their digital radios ARPS, to realize Real time positioning. Today let’s take RT3S APRS as an example, to explain the settings step by step.

What’s the Work principle of setting RT3S ARPS?

RT3S transmit GPS information to MMDVM–> MMDVM receive data packet and retransmit to Brandmeister server–> BM server transmit GPS information to APRS.fi–>User see the real time position of GPS radio holder.

How many steps for RT3S ARPS?

1.Setting on your bandmeister account
2.Setting on your hot spot
3.Setting on your RT3S software
4.Transmitting RT3S GPS position

Below please check the details for RT3S APRS settings:

1.Setting on your bandmeister account

A. Register on https://brandmeister.network/
B. Login brandmeister account, set in Selfcare settings Part, as below:

For APRS callsign part: Please check SSID description as below:

For walkie talkie products, we choose-7, so it’s BH6PJL-7.

Click “Save” to Finish this step.

2.Setting on your hot spot

Configuration on p-star Callsign, DMR ID, frequency in P-star
Make sure the”DMR master” is your local ID.
For Latitude and Longitude: please check on https://www.qrz.com/gridmapper
Final your “Zero”position and fix the Grid.

3.Set on RT3S programming software

A.Contacts settings
On https://wiki.brandmeister.network/index.php/China, we find APRS application private Call ID is 460999.We can designate the contact name: such as APRS-RT3S

Set Private contact to be APRS-RT3S.

B.Set communicaiton channel to be reversed to MMDVM (repeater) frequency

Set GPS system

4.Transmit GPS position

A .Normally GPS signal need transmit ourdoor, the effect will be better. Switch radio to channel 1. Wait till GPS signal too be total green( no red point), it stands for GPS position activated.

B.You can see you GPS position Menu>> GPS/Beidou Information

C.Press PTT, GPS information will be transmit to BM server, then BM server transmit to APRS.fi, based on BM settings before, every 60 secends, GPS position information will be automatically send to BM server( after first press, no need press PTT again), but please make sure the current channel no change, which is matching the MMDVM hot spot settings.

D.Search the tracked callsign of the GPS radio holder on APRS.fi website, we will see the GPS track.

E.If you do not want to set GPS position again, just switch to another channel, it will stop sending.

What Retevis radios can set APRS?
Retevis RT3, RT8, RT82, RT3S. All these channels can set APRS. Any other queries about APRS, we can discuss again.