DMRhub Knowledge base

A zone in a DMR radio is a folder of channels. How to split a codeplug into zones, how many channels fit, and why a dedicated DMRhub zone makes life easier.

WPSD (W0CHP-PiStar-Dash) is a living Pi-Star fork for an MMDVM hotspot: a new dashboard, an image for the Raspberry Pi 4/5/Zero 2 W, and an auto access point.

How to choose your first DMR radio: single-band or dual-band, budget and top-tier models (Baofeng, TYT, Retevis, AnyTone), open firmware and compatibility with…

How to roll a GD-77, DM-1801 or RD-5R back from OpenGD77 to stock: restore EEPROM and Flash, and flash the factory .sgl with the manufacturer's CPS.

Radio won't boot after a failed flash or a glitch? How to revive a brick: entering DFU/recovery on the TYT MD-380/390, GD-77/DM-1801 on OpenGD77 and…

Complete setup for the TYT MD-380, MD-390, MD-UV380 and UV390 radios: model differences, the official CPS and cable, building a codeplug, writing it, md380tools and beginner pitfalls.

What TXLevel and RXLevel in MMDVM.ini are, how they affect deviation and BER, how to set them via MMDVMCal, and why it matters for data on the DMRhub network.

Hotspot can't hear the radio and BER is climbing? We break down frequency drift on ADF7021 boards: why a cheap crystal wanders with temperature, what a TCXO gives you, and how to fix drift with RXOffset/TXOffset calibration.

How static talkgroups differ from dynamic ones, how to subscribe to a group with a short PTT tap, and why after 10–15 minutes of silence it drops out.

Talker Alias (TA) in DMR — sending the speaker's name and callsign together with the voice. Why it matters, how it is packed into frames, how to enable it on Anytone, and its link to Last Heard.

How to power an MMDVM hotspot from the sun: the panel-controller-battery-5V chain, choosing PWM or MPPT, sizing capacity for the night and cloudy weather, Li-ion protection and…

How to listen to DMR online without a radio: BrandMeister Hoseline, Last Heard in the browser, the DroidStar app, the SDR approach. We break down the Last Heard table, the etiquette of listening, and what DMRhub offers — air recordings, a map and reception in the Android app.