SRXL2™ TECHNOLOGY
WHAT IS SRXL2?
SRXL2 is a powerful bi-directional communications
protocol that improves the speed, security, and
richness of data transfer between your radio system
and compatible on-board devices such as flight
controllers and Smart ESCs. SRXL2 lowers the
latency compared to legacy protocols and allows flight controllers to be configured directly from your Spektrum transmitter,
without requiring a computer or smart device. You’ll also enjoy more responsive telemetry that can be customized precisely
to your needs. And it’s all done over one signal wire!
Please note that SRXL2 is not backward-compatible with the legacy SRXL and remote receiver protocols. SRXL2 support
updates may be required for your device to use SRXL2 receivers. See the download links on this page.
WHY CHANGE TO SRXL2?
SRXL2 is better – it's faster and offers expandable features.
Connected devices can report whether they’re able to support
bi-directional communication at a 400k baud rate or must
default to 115.2k (at the higher baud rate, more bits per second
can be transferred). Device installation and setup are made
easier by the ability of SRXL2 to function using only one signal
wire.
SRXL2 technology has paved the way for new developments
that would be unattainable with the previous technology's
limitations. And because its coding is available for open-source development, SRXL2 enables the RC community to create
more compatible devices – all with consistent performance so you can use them with confidence.
IN-HOUSE DEVELOPMENT
Research and development for the SRXL2 protocol was
conducted by the Spektrum’s own experienced engineering
and product development teams. Testing and validation were
handled by Spektrum engineers, beta teams, and the R&D lab
at Horizon Hobby. Because all of the development has been
done in-house, the Spektrum team can respond quickly to the
needs and wants of SRXL2 users. The open-source library
code that has been made available for third-party use is the
same one found in Spektrum receivers – making it easy for
the RC community to create and support SRXL2-compatible
devices.
SRXL2 THIRD-PARTY SUPPORT
The SRXL2 protocol is available as an open-source library code
that’s identical to the one used in Spektrum receivers. This will
allow other product developers to create their own SRXL2-compatible devices. If you're interested in bringing the innovation
of SRXL2 to your products, follow these links to our code library.
Github
Firmware targets
Smart Technology
PRODUCTS USING SRXL2
Many new products are being developed by the Spektrum team that use the SRXL2 protocol. See the current lineup here:
SRXL2-Equipped Products
Some Spektrum brand products that use legacy technology can support the SRXL2 protocol after updates are installed. See
them here:
SRXL2-Compatible with Updates