Radioddity DB25-D PRO

Supported

FM and DMR voice both ways, the hotspot, the DMR VFO, the PPP network services, cable programming and settings storage work on the radio. The older FD6818 batches run the same image, untested on a radio. Open: the Retevis RT73.

Also sold as: Kydera CDR-300UV
Type: Mobile
Bands: 136-174 / 400-480 MHz · Broadcast FM 87-108 MHz
Power: up to 25 W
Processor: HR_C7000
Screen: 1.77" color, 160 × 128
Voltage reading: None
Clock kept when off: Not known yet

Hardware versions

DBB DB25-D PRO: two BK4819 (2024 on): Supported
D64 FD6818 transceiver, 0x7813 LO (2021-2023): In development Untested on this hardware: its FD6818 transceiver and LO are driven from an analysis of the manufacturer's firmware, so FM and DMR may not receive or transmit. To go back, write the manufacturer's firmware file through the factory update mode.
D66 FD6818 transceiver and LO (2021-2023): In development Untested on this hardware: its FD6818 transceiver and LO are driven from an analysis of the manufacturer's firmware, so FM and DMR may not receive or transmit. To go back, write the manufacturer's firmware file through the factory update mode.
D6T FD6818 transceiver, AT1141 LO (2021-2023): In development Untested on this hardware: its FD6818 transceiver and LO are driven from an analysis of the manufacturer's firmware, so FM and DMR may not receive or transmit. To go back, write the manufacturer's firmware file through the factory update mode.

How to check your version

Open the Version screen in the radio's menu. The version reads like 909E.DBB.EARSAB.020: the letters after 909E. name the hardware.

Install on This Radio

Screens

All Screenshots of This Radio →

Features

Feature	Full	Amateur	Commercial
Radio and voice
Analog FM receive and transmit`FM`	included	included	included
CTCSS / DCS encode and decode`SUBTONE`	included	included	included
DMR Tier II voice (modem, call stack, AMBE FEC, vocoder)`DMR`	included	included	included
Basic privacy (Motorola / Anytone BP)`DMR_PRIVACY`	included	left out	included
Talker alias receive and send`DMR_TALKER_ALIAS`	included	included	included
ETSI GPS Info in the embedded LC`DMR_GPS`	included	included	included
CSBK signaling: call alert, radio check`DMR_SIGNALING`	included	included	included
DMR emergency (alarm, emergency call, hot mic)`DMR_EMERGENCY`	included	included	included
Repeater roaming`DMR_ROAMING`	included	included	included
VFO (hand-tuned frequency)`VFO`	included	included	included
FM VFO`VFO_FM`	included	included	included
DMR VFO (color code, slot, talk target typed in; mode change FM / DMR)`VFO_DMR`	included	included	included
Scan, band scan, dual watch, nuisance delete`SCAN`	included	included	included
Dual watch: A and B in any zone or the VFO, PTT on the selected one, its screens, talk back`DUAL_WATCH`	included	included	included
Beeps and alert tones`BEEP`	included	included	included
FM TX tones: roger beep, 1750 Hz burst`FM_TX_TONES`	included	included	included
DTMF transmit from the keys`DTMF`	included	included	included
FM VOX`VOX`	not written for this radio yet	not written for this radio yet	not written for this radio yet
Frequency trim, Settings > Advanced`REF_TRIM`	included	included	included
Receiver battery saver`BATTERY_SAVE`	included	included	included
GPS receiver: the module driver and its NMEA input (Settings > Location > GPS)`GPS`	included	included	included
Broadcast FM receiver`BCAST_FM`	not written for this radio yet	not written for this radio yet	not written for this radio yet
Key assignment (Settings > Keys, codeplug)`KEY_ASSIGN`	included	included	included
Channels list: every channel by number, a channel's settings (hub 5)`CHANNEL_LIST`	included	included	included
Channel editor: edit a channel, New channel from current settings, text entry`CHANNEL_EDIT`	included	included	included
Zone editor: move, add, copy and remove channels in a zone; rename, copy and delete a zone`ZONE_EDIT`	included	included	included
Contact editor: a new contact from Find or a call's actions (name, ID, type, timeslot)`CONTACT_EDIT`	included	included	included
Other
HRC_MODEM`HRC_MODEM`	included	included	included
P25_PROBE`P25_PROBE`	left out	left out	left out
P25`P25`	left out	left out	left out
P25_VOICE`P25_VOICE`	left out	left out	left out
P25_TX`P25_TX`	left out	left out	left out
P25_STAR`P25_STAR`	left out	left out	left out
UI_INSTRUMENT`UI_INSTRUMENT`	left out	left out	left out
DMR data
Text messages (ETSI IP text by default)`DMR_SMS`	included	included	included
Motorola TMS text format`DMR_TMS`	included	left out	included
ARS registration`DMR_ARS`	included	left out	included
LRRP location`DMR_LRRP`	included	left out	included
Zone and channel sharing: send a zone or a channel, import an offered one`ZONE_SHARE`	included	included	included
Compressed UDP/IP headers on transmit (SAP 3)`DMR_UDP_COMPRESS`	included	included	included
Confirmed packet data`DMR_CONFIRMED`	included	included	included
Single frequency repeater: MMDVM SFR, and the standalone SFR (experimental)`SFR`	included	included	included
Experimental: SFR user receive "dual-path RX": a voice frame whose FEC failed comes from the other copy`SFR_DUALPATH_RX`	included	included	included
Experimental: standalone SFR repeater's periodic CW ID (callsign in Morse, FM)`SFR_CWID`	included	included	included
APRS: AFSK positions, status, messages; DMR positions; KISS TNC`APRS`	included	included	left out
APRS receive: demodulator, station list, digipeater`APRS_RX`	not written for this radio yet	not written for this radio yet	not written for this radio yet
APRS iGate rules (with tools/aprs_gate.py)`APRS_IGATE`	not written for this radio yet	not written for this radio yet	not written for this radio yet
GPS screen: sky plot, signal bars, grid locator (Tools > Position)`GPS_SKY`	included	included	left out
Network (USB network adapter and IP over DMR)
IP over DMR gateway`DMR_IP_GATEWAY`	included	included	included
Minimal TCP`NET_TCP`	included	included	included
KISS over TCP, port 8001`NET_KISS`	included	included	left out
HTTP status page and JSON, port 80`NET_HTTP`	included	included	included
HTTP static files stored and served gzip compressed`NET_HTTP_GZIP`	included	included	included
Web control: the front panel page, keys, status and receive audio over /ws`NET_WEBCTL`	included	included	included
rigctld, port 4532`NET_RIGCTL`	included	included	included
APRS-IS client`NET_APRSIS`	included	included	left out
Audio linking (USRP over UDP, port 34001)`NET_USRP`	not written for this radio yet	not written for this radio yet	not written for this radio yet
mDNS / DNS-SD (rfoundry-<id>.local)`MDNS`	included	included	included
TFTP codeplug read / write`TFTP`	included	included	included
DMR ID database over TFTP (iddb.bin, combined codeplug.bin)`TFTP_IDDB`	included	included	included
Compact DMR ID database (format C) read beside format N`IDDB_COMPACT`	included	included	included
Control station mode (boot as network, PC answers data, fixed link)`DMR_CONTROL_STATION`	included	left out	included
SNMP v2c agent and traps (USB and over the air)`SNMP`	included	left out	included
PPP on the serial host port (IPv4 into the gateway)`NET_PPP`	included	included	included
Host link and USB
Task stacks in the debug link view`TASK_STACKS`	included	included	included
Host link: hotspot, CPS, debug link on the host port`HOSTLINK`	included	included	included
MMDVM hotspot`HOTSPOT`	included	included	left out
Split duplex repeater (two radios, one duplex modem)`HOTSPOT_SPLIT`	not written for this radio yet	not written for this radio yet	not written for this radio yet
Debug link`DEBUGLINK`	included	included	included
Open-firmware CPS protocol (qdmr)`CPS_OPENFW`	included	included	included
Fast codeplug protocol (debug link CODEPLUG)`CPS_FAST`	included	included	included
Loader hand-over (stub entry, command 0x1A)`STUB_ENTRY`	included	included	included
Crash log`CRASH_LOG`	included	included	included
Crash log screen`CRASH_SCREEN`	included	included	included
Crash report over DMR`CRASH_REPORT`	included	included	included
Hardware watchdog`WATCHDOG`	included	included	included
Fault trace on the host UART`FAULT_TRACE`	included	included	included
User interface
Diagnostics page`DIAG`	included	included	included
Anti-aliased fonts`FONT_AA`	left out	left out	left out
Larger text`FONT_BIG`	left out	left out	left out
Spanish on the radio`LANG_ES`	included	included	included
Italian on the radio`LANG_IT`	left out	left out	left out
Start in Spanish`LANG_DEFAULT_ES`	left out	left out	left out
Start in Italian`LANG_DEFAULT_IT`	left out	left out	left out
Color screen settings (theme, highlight color, filled status bar)`UI_COLOR`	included	included	included
Settings menu on the radio`UI_SETTINGS`	included	included	included
Storage
Settings and codeplug storage on SPI NAND`NAND_STORAGE`	included	included	included

● included · ○ left out

Not available on this radio: USB device, USB network adapter (CDC-NCM), 16x32 font, Vibration alerts (Settings > Sound > Vibrate), Air band AM receive (108-137 MHz)

Entering Update Mode

Connect the programming cable to the radio and to the computer.
Open the radio programming utility and choose the cable. A radio that already runs RadioFoundry is detected without holding keys or turning it off.
Otherwise, turn the radio off and on again when prompted. Do not hold any keys. The screen stays dark and the LED on top blinks yellow while the radio is in update mode.

Documentation

Hardware reference