Card Edition MkII

• Compatibility
• ADS-B Out remark
• Card Mark II vs Card
• Disclaimer
• Useful links

Card Edition Mark II is a direct successor of SoftRF Card 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.

Card Edition Mark II is based upon a partner's hardware - Seeed SenseCAP MeshTracker X1 product, which is available for direct purchase from manufacturer at more or less reasonable price.

Seed® MeshTracker X1 uses he most recent and advanced Semtech LR2021 multi-band radio on the market

• sub-1 GHz band
• 2.1 GHz S-band
• 2.4 GHz ISM band
• OOK modem @ 2 MBPS - ADS-B ES @ 1090 MHz
• FSK modem @ 1041 KBPS - ADS-B UAT @ 978 MHz ( needs for Semtech to fix issue https://github.com/Lora-net/usp/issues/4 )

Compatibility ¹

Type	Protocol	FLARM	OGN tracker	PilotAware	Skytraxx	SoftRF
Radio	FLARM AIR V7
	OGNTP
	P3I
	FANET+
	1090 ES ADS-B			2		2
	SRD 860 ADS-L
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.
² - Reception of DF17 traffic 'downlink' frames only.

ADS-B Out remark

No doubts that an amateur-built non-certified low-cost ADS-B transponder is possible.
It was shown to public by our own "proof-of-concept" study for :

• 1090 ES ("ADSB-Out" GitHub project) in 2017, and
• 978 UAT ("UAT-test-signal" GitHub project) in 2018 .

However, as a certified and instrument rated pilot with 20+ years of experience, in no way I will give a tool for every looser in the world, all he/she can afford is to spend 50 USD for the Seed® MeshTracker X1, to abuse the ADS-B technology and compromise my own flight safety and flight safety of every other air law abiding pilot.

SoftRF firmware does intentionally exclude every possibilities to transmit anything on 1090 MHz radio frequency.
Any attempt to contribute the transmit feature into SoftRF from aside will be blocked at very early stage.

Card Mark II vs Card

This is a picture of Card Mk.II  ( left ) and Card Classic   ( right ) Editions, side by side.

Edition	Card	Card Mk II
First appearance	2024	2026
Manufacturer	Seeed Studio	Seeed Studio
SoC	Nordic nRF52840	Nordic nRF52840
QSPI flash memory	not specified 3	8 MB
sub-1GHz radio	Semtech LR1110	Semtech LR2021
sub-1GHz antenna	internal, PCB	internal, PCB
Battery	Li-Ion 700 mAh	Li-Ion 1100 mAh
GNSS receiver	Airoha AG3335	Airoha AG3335
GNSS band(s)	L1	L1 + L5
USB	2.0 device	2.0 device
LED	green	red green blue
Button(s)	1 pc.	1 pc.
Buzzer	1 pc.	1 pc.
Haptic		1 pc.
Sensors	QMA6100P accelerometer light temperature	air pressure SPA06-003  optional STMicroelectronics LSM6D IMU optional Bosch BMM350 magnetometer
Water and dust resistance	IP65	IP66
Certificates	FCC  CE	TBD
Weight (g)	32	45
Thickness (mm)	6.5	8

³ - QSPI flash memory is not reported in the Seeed T1000-E specs. However, some of the hardware revisions may (or may not) have this feature available ;

Disclaimer

Source code of SoftRF firmware for Card Edition Mark II 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 Seeed SenseCAP MeshTracker X1. Ask for support from seller or manufacturer ;
• reserves the right to suspend or terminate support of the MeshTracker X1 device in the firmware at any time.

For the time being ( Jul '26 ) there were no critical hardware issues reported for current version of the SenseCAP MeshTracker X1. However things my change over the time...
If you have issues with bringing up your new MeshTracker X1 or just not happy with the device - be prepared to execute your Purchase Protection plan.

Additional information on MeshTracker X1

1. Seeed Studio MeshTracker X1 Wiki