Setup

Why the RadioStar image beats hand-tuned Pi-Star: modem auto-detection, config from the portal, OTA updates. How to migrate painlessly: back up the old SD, flash…

How MMDVM_HS_Hat differs from Dual_Hat: one or two ADF7021, simplex vs duplex, TCXO, AliExpress clones and frequency offset calibration.

A tiny 0.96″ OLED (SSD1306, I2C) on an MMDVM hotspot: which 4 wires go where (SDA/SCL/3.3V/GND), address 0x3C, how to enable it in the config, what the screen shows…

Complete Pi-Star setup: flashing the image to SD, first login via Pistar-Setup, frequency and Color Code, adding your own DMR master in DMR Configuration for…

How to log in to Pi-Star: the pi-star.local dashboard address, the default pi-star login and raspberry password, SSH on port 2222, changing the password, resetting via the SD card and fixing access issues.

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.

MMDVM in plain words: what this modem is, what a hotspot is made of (ADF7021, STM32, MMDVMHost on Raspberry Pi), which boards exist and what a beginner should pick for DMR.

Which DMR hotspot to choose in 2026: simplex or duplex, MMDVM_HS_Hat vs Jumbospot vs Dual Hat. Pi Zero 2W, TCXO, Pi-Star, WPSD. A buyer's checklist.

Why DMR audio on a Wi-Fi hotspot stutters even with clean BER: power-save drops the frame stream. Diagnosing packet loss and the fixes — Ethernet, power.

Which Raspberry Pi and which MMDVM modem to choose for a DMR hotspot: the difference between MMDVM_HS_Hat and Dual Hat, simplex and duplex, ADF7021, GPIO and USB modems…

SharkRF openSPOT versus a DIY MMDVM on Raspberry Pi with Pi-Star/RadioStar: price, ease of getting started, flexibility, cross-mode, support. Selection criteria.