TeleBT provides the equivalent of a TeleDongle, with the addition of Bluetooth as an alternative to USB for connection to the ground station computer.

The RF filter components are set for use in the vicinity of 435 Mhz.

These are photos of the first production version, 1.0:

And here's what it looks like packaged with battery, attached to an Arrow 3-element yagi, ready for use:

For the latest TeleBT firmware and related software, please visit the AltOS and AltosDroid pages on this site. There is also a compatible iOS application available for sale from our friends at Iron Sheep Productions.

If you're using TeleBT with an Arrow yagi, we now have a 3D-printable mount design available!


User View

  • 70cm ham-band transceiver compatible with Altus Metrum products, programmed for 38k4 GFSK data rate with forward error correction
  • micro USB interface
  • 4 pin Tyco MicroMaTch connector for debug and flash programming
  • 8 pin Tyco MicroMaTch connector supports serial or SPI interface
  • 850mAh LiPo battery charged via USB

Developer View

  • TI CC1111F32 Low Power RF System-on-Chip
    • Sub-1Ghz transceiver
    • 8051 MCU
    • 32k Flash
    • 4k RAM
    • USB 2.0
    • 6 12-bit analog inputs (11 bits with single-ended sensors)
    • 2 channels of serial I/O
    • digital I/O
    • interfaced to Arduino via async serial plus two handshake pins
  • Rayson BTM-182 (Bluetooth SPP module) with async interface to CC1111
  • 150mA 3.3V LDO regulator
    • input and output appear on 8-pin companion connector
  • Firmware Features
    • Written mostly in C with some 8051 assembler
    • Runs from on-chip flash, uses on-chip RAM
    • USB serial emulation for data interface
  • Tools Used
    • gEDA for schematic capture and PCB layout
    • SDCC compiler and source debugger
  • Licenses


There is a single manual for all Altus Metrum products, which is available in html and pdf formats.

The hardware design current gEDA files are available from in the project hw/teleshield.

For those who don't have ready access to the gEDA suite, here are pdf snapshots of the files for Production PCB version 1.0 in more easily readable form.

Future Plans

The inventory of version 1.0 boards was lost in the fire that destroyed Bdale's home in June of 2013. Version 1.1 will be available for purchase we hope by the end of October 2013.

TeleBT works with both AltosUI version 1.2 and later, and a new Android application called AltosDroid.