DAB+ FM Digital Radio Development Board PRO2.5


  • Model: SLG002
  • Shipping Weight: 160 g
  • 30 Units in Stock
  • Manufactured by: Sixth Logic


Platform for developing and evaluating DAB+, SlideShow and FM receiver, this board contains a Keystone T4B DAB/FM module and a Microchip PIC18F14K50 microcontroller.

DAB FM Radio SlideShow

Designed and Made in Australia, the DAB+ FM Digital Radio Development Board Pro2 provides a platform for developing and evaluating DAB+, SlideShow and FM receiver. The board contains a Keystone T4B DAB/FM module and a Microchip PIC18F14K50 microcontroller.

The T4B module is Keystone's latest DAB+/FM receiver module with the following features:

  • ETSI EN 300 401 compliant receiver
  • DAB/DAB+ sensitivity to -99dBm (typical)
  • FM sensitivity to -106dBm (typical)
  • DAB Color Slide show support (Data service option)
  • Decodes audio services up to 384kbps without external RAM
  • FM with RDS/RBDS decoder (*** RDS reception only available for station name, station text and genre and is subjected to certain condition of power level and frequency deviation)
  • Combined antenna input for FM / Band3
  • UART Serial control interface
  • Integrated stereo audio DAC
  • Digital audio output – I2S
  • Real time clock accurate 50ppm
  • Configurable general purpose I/O
  • Ultra low-power

The Microchip PIC18F14K50 provides a USB to Serial interface for the T4B module to communicate with the host PC. Despite the sample code provided in this Development Board for communicating with the board is based on serial communication, user can analyse the serial communication and implements a driverless HID protocol by rewriting the firmware on the PIC18F14K50.

Comparison Pro Vs Pro2 vs Pro2.5

Pro (old) Pro2 (2019) Pro2.5 (2022)
DAB-FM-Radio-Top-View-Ruler DAB-FM-Radio-Top-View-Ruler DAB-FM-Radio-Top-View-Ruler
Keystone Module T2-L4A-8650C T4B T4B
Power to Module 1.2V, 1.8V, 3.3V 3.3V 3.3V
Removable Keystone Module
Programmable GPIO
Serial Protocol Old New New
Serial Baud Rate 57600 115200 115200
User GPIO 0 8 8
USB Connector Mini USB Micro USB USB-C
Board Size 78mm x 45mm 100mm x 60mm 100mm x 60mm
Made In China Australia Australia


DAB Radio SlideShow

The KeyStone T4B module supports SlideShow. Slideshow adds visual content (slides) to radio broadcasts on DAB or DAB+. It enhanced the digital radio with visuals using images in JPEG or PNG format.

Board Dimension

100mm x 60mm

What can you do with it?

  • Build a PC controlled DAB+ FM Digital Radio with SlideShow
  • Build a CAR PC DAB+ FM Digital Radio with SlideShow
  • Build a standalone DAB+ FM Digital Radio (requires external microcontroller)



Power Supply Circuit

The board is typically powered by 5VDC from USB. The PIC18F14K50 is drawing power directly from the USB. From the USB’s 5VDC, the power is further distributed into 3.3VDC LDO to the KeyStone T4B module. The power of LDO is always on.

Microchip PIC18F14K50

This microcontroller is used to provide a Virtual Serial Port to the KeyStone module. It is flashed with a customised CDC RS-232 Emulation Demo firmware. Other than performing the standard serial emulation, it also control the power, reset and audio shunt of the KeyStone module.

Reset Circuit

Reset of the module is performed by RESET pin emulated by DTR of the virtual serial port.


The ICSP programming port is the standard Microchip’s In-Circuit Serial Programming port and is compatible with Microchip’s PICkit.


EXT port has two 5V logic signals, ˉSHDN and ˉSHNT. They are used to control external audio circuitry’s power and mute.

Push Button (SW1)

This button, when pressed during a power-up, will trigger the PIC18F14K50’s USB HID bootloader in programming mode.

Demo Software

Packing List

  • 1 unit of DAB+ FM Digital Radio Development Board Pro with KeyStone T4B module
  • 1 unit of retractable antenna