ExpressLRS V1.2.0 Release Notes

The important stuff

• Arming must be on AUX1 for safety and feature reasons, having this fixed allows us to maintain small packet sizes and deliver better aux channel options
• Be sure to flash both the TX and RX expresslrs.org/quick-start/

Enhancements

• NA

Bugfixes

• For Happymodel EP receivers that take multiple plugins to start, with a "dim LED" or "solid LED for 3-10 seconds before starting to blink", a software workaround for the underspec regulator on those devices (labeled SDG) allows most to function as proper receivers. Contact HappyModel for replacement options if you have a receiver with this regulator. https://github.com/ExpressLRS/ExpressLRS/pull/929
• Fix for LQ dropping to 75 then 50 then 25 (nonce slip bug) when using ‘no sync on arm’ due to a bug in the TX code. This may also happen when sync is used but not noticed since the link will usually self-heal. https://github.com/ExpressLRS/ExpressLRS/pull/946
• Fix intermittent crash-reboot when starting TX module https://github.com/ExpressLRS/ExpressLRS/pull/897
• Telemetry was sending more Advanced Telemetry (Betaflight telemetry items) than it should have, resulting in fewer LinkStatistics telemetry being sent https://github.com/ExpressLRS/ExpressLRS/pull/905
• Fixes RX communication with KISS V1. Select UART_RX_SPEED_400K in the Configurator. https://github.com/ExpressLRS/ExpressLRS/pull/959

Hardware Targets:

2.4GHz

• Quadkopters JR module and receiver https://github.com/ExpressLRS/ExpressLRS/pull/790 https://github.com/ExpressLRS/ExpressLRS/pull/1004
• Matek receivers https://github.com/ExpressLRS/ExpressLRS/pull/920

915-868MHz

• NA

A note on versioning

The versioning scheme chosen by the ExpressLRS devs is based on the semantic versioning scheme. https://semver.org/

Where a version is defined as “major.minor.patch” major = major new feature and/or incompatible changes minor = minor features or enhancements and/or new targets patch = bug-fixes