Bracelet Edition
Bracelet Edition is a variant of SoftRF DIY GA proximity awareness device been implemented in a small, lightweight wristband form factor.
It is supposed to require minimal skills from a builder to begin with and gives an opportunity to evaluate if the SoftRF technology is appropriate for your needs.
The Bracelet is based upon a partner's hardware - TTGO T-Impulse board, which is available for direct purchase from manufacturer at more or less reasonable price (30+ USD).
T-Impulse is:
- a multipurpose ,
- DIY-friendly ,
- low power ,
- lightweight
- LoRaWAN wristband with GNSS receiver and 9DOF sensor.
The board's design is a joint development of both LilyGO® company and SoftRF project.
The T-Impulse is an example of cutting edge technology. It contains (some of the most popular):
- STMicroelectronics STM32L073Z Low Power MCU ;
- Semtech SX127x Long Range Low Power RF Transceiver ;
- Sony CXD5603GF Low Power GNSS Receiver ;
- TDK InvenSense ICM-20948 Inertial Measurement Unit ;
- 0.49" I2C OLED display
| Type | Protocol | FLARM | OGN tracker | PilotAware | Skytraxx | SoftRF |
|---|---|---|---|---|---|---|
| Radio | FLARM AIR V6 |
|
|
|
||
OGNTP |
|
|
||||
P3I |
|
|
||||
FANET+ |
|
|
||||
| Data | FLARM NMEA |
|
|
|
|
|
| Garmin GDL90 |
|
|
||||
Dump1090 |
|
1 - it is necessary for a reader to distinguish the difference between statement "compatible"
and statement "fully compatible".
SoftRF implements only a reasonable minimum of the protocols specs.
No "bells and whistles" so far.
SoftRF firmware for Bracelet Edition is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Author of SoftRF firmware:
- will reject any hardware related claims associated with TTGO T-Impulse wristband. Ask for support from seller or manufacturer ;
- reserves the right to suspend or terminate support of TTGO T-Impulse in the firmware at any time.
For the time being ( Sep '21 ) there were no critical hardware issues reported for current version of the T-Impulse wristband. However things my change over the time...
If you have issues with bringing up your new TTGO T-Impulse or just not happy with the board - be prepared to execute your Purchase Protection plan.
| Number | Part | Qty | Picture | Source |
|---|---|---|---|---|
| 1 | LilyGO® T-Impulse 1 |
1 |  |
AliExpress |
1 - 868 MHz variant is applicable for these world regions: EU, RU, NZ, SA, IN ;
915 MHz - US, CA, AU, IL, KR ;
433 MHz - CN .
NOTICE: Use comments area of your order to ask seller if they can pre-install SoftRF firmware into your T-Impulse wristband(s) before shipping.
