DV-Mega GMSK modem and UHF transceiver

DVMEGA-UHF / DVMEGA-DUAL Transceiver Board for Raspberry Pi Nuovo

The boards DVMEGA-UHF and DVMEGA-DUAL are daughter cards for the Raspberry Pi. In combination with this single board computer it becomes very easy to construct an entire radio solution for a low power D-Star Node Adaptor.

DVMEGA-UHF

The DVMEGA transceiver board utilizes the chip ADF7021. This IC constitutes a complete transceiver for digital data with GMSK modulation. The control of the transceiver chip is handled with a local ATMEGA 328 on the same board. The result is a flexible digital transceiver component with low power for the frequency range from 144 to 148 (DVMEGA-DUAL) and from 430 to 450 MHz (DVMEGA-DUAL and DVMEGA-UHF). The DVMEGA board handles the radio side and the modulation/demodulation part, the Raspberry Pi is used for the protocol handling of D-Star (and future digital modes).

The software for the Raspberry Pi is available in a Yahoo group. here G4KLX offers programs like ircDDBGateway and the PCRepeaterController. With these programs and the above mentioned hardware it becomes very easy to construct a local low-power hotspot for digital modes. The benefit is, tha tduie to the dlexible construction and software future developments can be made available as well.

Please consider your local regulations concerning the construction and use of such radio systems. The combined products do not have a CE mark and should only be used by licensed radio amateurs.

Ordine No.
DVMEGA-UHF UHF Transceiver for Raspberry-Pi 94.00 € Ordina Nuovo
DVMEGA-DUAL VHF/UHF Transceiver for Raspberry-Pi 139.00 € Ordina Nuovo
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BlueStack-Micro Plus: Bluetooth Adaptor Board for DVMega Nuovo

BlueStack-Micro Plus

Universal adaptor for DVMega raspberry-pi boards. It connects via Bluetooth to your Android device using the free App BlueDV. It can communicate to a PC via the USB-port for use with MMDVM-host or G4KLX software (PC-dongle function). Also it features easy firmware updates of DVMEGA boards via USB.

  • Bluetooth to Android
  • USB to PC for G4KLX or MMDVM-host software
  • USB adaptor for upgrading DVMega firmware
Ordine No.
DVMEGA-BSMP BlueStack-Micro Plus 39.00 € Ordina Nuovo
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Link: Interesting Software Project for BlueStack MicroPlus: Blue DV by PA7LIM

DVMEGA-GMSK modem for Arduino Nuovo

The DVMEGA-GMSK board is a modem for GMSK modulation, which is used as a shield for select Arduino hardware. For the construction of a complete Node Adaptor an additional computer (a Raspberry Pi will do) and a radio (9k6 capable) is required.

DVMEGA-GMSK Modem Principle Principle of operation DVMEGA GMSK Modem

The DVMEGA GMSK board utilizes the CMX589 modem chip and is used as a shield for Arduino UNO, Arduino Mega 128 or Arduino Mega 2560. The Arduino controls the modem with the help of a freely available software. Received GMSK signals are decoded by the modem and are then transferred over the USB interface to an attached computer. Transmit-wise the digital data is sent from the computer to the Arduino and the modem, which then produces a GMSK signal used to modulate the attached radio. The connection to the radio is done over a standard 6pin MiniDIN Data connector.

DVMEGA GMSK Modem

A computer program is available for a Windows PC and for the raspberyr Pi. Using Yahoo groups, the author G4KLX offers various programs like ircDDBGateway and the PCrepeaterController. With these programs and above mentioned hardware a local hotspot for digital modulation can be built. The benefit is, that due to the use of a software programmable modem on the Arduino, the function can be adopted to future developments. For example it would be possible to extend the function of the modem not only to Icoms D-Star mode, but also to Yaesus 'System Fusion' C4FM modulation or other digital systems (e.g. DMR).

Please consider your local regulations concerning the construction and use of such radio systems. The combined products do not have a CE mark and should only be used by licensed radio amateurs.

Ordine No.
DVMEGA-GMSK GMSK Modem for Arduino 63.00 € Ordina Nuovo
42925.6 mini DIN connector full metal 6-pin 7.90 € Ordina
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