09-10-2022, 09:03 AM
A major development for RC control links for planes -ELRS- is becoming available with the Frsky Twin. However the new technology can also be used in Radiomaster, Taranis, QX7 and other radios, and its already in use for drones where ELRS has started to displace Crossfire.
Twin uses the leading open source protocols developed over many years for racing FPV to improve latency, telemetry, distance and signal quality.
Twin is a dual band system that Mawz says "using 1 FSK link (traditional 2.4G tech, same basic tech as ACCESS and TANDEM 2.4G and 1 LoRA link (same tech as ELRS, Tracer and Ghost on 2.4G, as well as all current 900MHz systems)".
(Mawz post #8 in https://www.rcgroups.com/forums/showthre...Lite-Radio)
Mawz post #22 says:
" That is really a sea change in the available RF performance for 2.4G systems and a major shot across the bows of the older solutions, especially for those of us flying in more challenging RF environments. And it's not one coming from the high-dollar brands, but rather two of the brands often looked down on as 'Budget' solutions and the hobbyist community itself."
Github provides a fuller explanation:
https://github.com/ExpressLRS/ExpressLRS says:
"ExpressLRS is an open source Radio Link for Radio Control applications. Designed to be the best FPV Racing link, it is based on the fantastic Semtech SX127x/SX1280 LoRa hardware combined with an Espressif or STM32 Processor. Using LoRa modulation as well as reduced packet size it achieves best in class range and latency. It achieves this using a highly optimized over-the-air packet structure, giving simultaneous range and latency advantages. It supports both 900 MHz and 2.4 GHz links, each with their own benefits. 900 MHz supports a maximum of 200 Hz packet rate, with higher penetration. 2.4 GHz supports a blistering fast 500 Hz on EdgeTX. With over 60 different hardware targets and 13 hardware manufacuturers, the choice of hardware is ever growing, with different hardware suited to different requirements."
For a good discussion of ELRS see Bardwell, including flashing ELRS onto a Radiomaster with a Frsky R9 Access module and a Frsky R9 access rx.
https://www.youtube.com/watch?v=-TGYy1psWgU
This module is available on Horusrc for $US55 and is compatible with various access Frsky radios including QX7 and Taranis.
Bardwell says ELRS is a radio control link firmware that has the highest performance, longest range length, and lowest latency compared to all the competition.
An ELRS module for Frsky Tandem txs is already available on Horusrc for US$70
https://www.horusrc.com/en/modules/dual-2-4ghz-module.
The only rx that currently works with this module (AFAIK) is the Frsky Vantac ELRS rx for US$ 13, but it is a drone rx with no PWM ports for servos. But other receivers and a Twin tx are in the pipeline. See below for rxs available now. I understand the current Frsky ETHOS firmware may require an update to run Twin.
Twin uses the leading open source protocols developed over many years for racing FPV to improve latency, telemetry, distance and signal quality.
Twin is a dual band system that Mawz says "using 1 FSK link (traditional 2.4G tech, same basic tech as ACCESS and TANDEM 2.4G and 1 LoRA link (same tech as ELRS, Tracer and Ghost on 2.4G, as well as all current 900MHz systems)".
(Mawz post #8 in https://www.rcgroups.com/forums/showthre...Lite-Radio)
Mawz post #22 says:
" That is really a sea change in the available RF performance for 2.4G systems and a major shot across the bows of the older solutions, especially for those of us flying in more challenging RF environments. And it's not one coming from the high-dollar brands, but rather two of the brands often looked down on as 'Budget' solutions and the hobbyist community itself."
Github provides a fuller explanation:
https://github.com/ExpressLRS/ExpressLRS says:
"ExpressLRS is an open source Radio Link for Radio Control applications. Designed to be the best FPV Racing link, it is based on the fantastic Semtech SX127x/SX1280 LoRa hardware combined with an Espressif or STM32 Processor. Using LoRa modulation as well as reduced packet size it achieves best in class range and latency. It achieves this using a highly optimized over-the-air packet structure, giving simultaneous range and latency advantages. It supports both 900 MHz and 2.4 GHz links, each with their own benefits. 900 MHz supports a maximum of 200 Hz packet rate, with higher penetration. 2.4 GHz supports a blistering fast 500 Hz on EdgeTX. With over 60 different hardware targets and 13 hardware manufacuturers, the choice of hardware is ever growing, with different hardware suited to different requirements."
For a good discussion of ELRS see Bardwell, including flashing ELRS onto a Radiomaster with a Frsky R9 Access module and a Frsky R9 access rx.
https://www.youtube.com/watch?v=-TGYy1psWgU
This module is available on Horusrc for $US55 and is compatible with various access Frsky radios including QX7 and Taranis.
Bardwell says ELRS is a radio control link firmware that has the highest performance, longest range length, and lowest latency compared to all the competition.
An ELRS module for Frsky Tandem txs is already available on Horusrc for US$70
https://www.horusrc.com/en/modules/dual-2-4ghz-module.
The only rx that currently works with this module (AFAIK) is the Frsky Vantac ELRS rx for US$ 13, but it is a drone rx with no PWM ports for servos. But other receivers and a Twin tx are in the pipeline. See below for rxs available now. I understand the current Frsky ETHOS firmware may require an update to run Twin.