= Release Notes for Version 1.6.4 include::release-head.adoc[] :doctype: article Version 1.6.4 fixes a bluetooth communication problem with TeleBT v1.0 devices, along with some altosui and altosdroid minor nits. It also now ships firmware for some newer devices. == AltOS AltOS fixes: * Fix hardware flow control on TeleBT v1.0. Hardware RTS/CTS doesn't seem to work, switch from using the hardware to driving these pins with software. * Fix ARM USB drivers to deal with OS restarts. Needed to reset all USB-related state when the USB bus is reset. These fixes affect all STM32L, STM32F0 and LPC11U14 based devices. == AltosUI, TeleGPS and AltosDroid Applications AltosUI, TeleGPS and AltosDroid New Features: * Automatically switch from meters or feet to kilometers or miles for distance units. * Add Monitor Idle mode to TeleGPS application. AltosUI, TeleGPS and AltosDroid Fixes: * Abort map preloading when the preload map dialog is closed. * In AltosDroid, Don't reconnect to last device if the user had disconnected it the last time the application was active. == Documentation * Mention TeleMega v2.0 in hardware specs table. * Document TeleGPS RF output in telegps manual.