TeleBT
TeleBT provides the equivalent of a TeleDongle, with both USB and Bluetooth for connection to the ground station computer or mobile device.
The RF filter components are set for use in the vicinity of 435 Mhz.
These are photos of the first production version, 1.0. Maybe someday we'll get around to adding photos of the current production version 4.0, but they look pretty similar once they're in the blue box!
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!
Features
User View
- 70cm ham-band transceiver compatible with Altus Metrum products, programmed for 38k4 GFSK data rate with forward error correction
- Bluetooth / Bluetooth LE radio
- micro USB interface
- 4 pin Tyco MicroMaTch connector for debug and flash programming
- 850mAh LiPo battery charged via USB
Developer View
- STM32F042 System-on-Chip
- ARM Cortex-M0 MCU
- 32k Flash
- 6k RAM
- USB 2.0 Full Speed
- CC1200 Low Power, High Performance RF Transceiver
- RN4678 Bluetooth module
- Firmware Features
- Written mostly in C with some ARM assembler
- Runs from on-chip flash, uses on-chip RAM
- USB serial emulation for data interface
- Tools Used
- Licenses
- The hardware is licensed under the TAPR Open Hardware License
- The software is licensed GPL version 2
Artifacts
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 git.gag.com 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 4.0 in more easily readable form.