Stylus Edition

• Compatibility
• Stylus vs Bracelet
• Disclaimer
• Bill of materials

Stylus Edition is a successor of SoftRF Bracelet Edition.

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.

Stylus Edition is based on third-party's hardware - LilyGO® T-Impulse Plus product, which is available for direct purchase from manufacturer at more or less reasonable price (40+ USD).

The T-Impulse Plus is an example of cutting edge technology. It contains

• Nordic nRF52840 Low Power MCU
• Semtech SX1262 Long Range Low Power RF Transceiver with TCXO clock source
• Ublox MIA-M10Q GNSS Receiver
• 0.49" I²C OLED display
• Zetta ZD25WQ32B 4 Mbytes QSPI flash memory storage
• TDK InvenSense ICM-20948 Inertial Measurement Unit

Compatibility ¹

Type	Protocol	FLARM	OGN tracker	PilotAware	Skytraxx	SoftRF
Radio	FLARM AIR V7
	OGNTP
	P3I
	FANET+
	SRD 860 ADS-L
Data	FLARM NMEA
	Garmin GDL90
	Dump1090

¹ - it is necessary for a reader to feel 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.

Stylus vs Bracelet

Edition	Bracelet	Stylus
First appearance	2021	2026
Manufacturer	LilyGO	LilyGO
SoC	STMicroelectronics STM32L073Z	Nordic Semi nRF52840
sub-1GHz radio	Semtech SX1276	Semtech SX1262
sub-1GHz antenna	internal, PCB	external, SMA
Display	0.49" OLED 64x32	0.49" OLED 64x32
Battery	Li-Ion 250 mAh	Li-Ion 200 mAh
GNSS receiver	Sony CXD5603GF	Ublox MIA-M10Q
USB	2.0 device	2.0 device
Sensors	TDK InvenSense ICM-20948 IMU	TDK InvenSense ICM-20948 IMU
QSPI flash memory		4 MB

Disclaimer

SoftRF firmware for Stylus 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 LilyGO® T-Impulse Plus product. Ask for support from seller or manufacturer ;
• reserves the right to suspend or terminate support of LilyGO® T-Impulse Plus in the firmware at any time.

If you have issues with bringing up your new LilyGO® T-Impulse Plus or just not happy with the device - be prepared to execute your Purchase Protection plan.

Bill of materials

Required

Number	Part	Qty	Picture	Source
1	LilyGO® T-Impulse Plus 3	1		Seeed Store

³ - 868 MHz variant is applicable for these world regions: EU, RU, NZ, SA, IN ;
     915 MHz - US, CA, AU, IL, KR ;
     433 MHz - CN .