-Install all files for desired firmware on sdcard
-place Tx16s firmware file in FIRMWARE Dir on SDCARD i.e. EdgeTx2.8 is file tx16xf6dd140e.bin
-place multi firmware file in FIRMWARE Dir on SDCARD i.e. Multi 4-1(1.3.3.20) is file mm-stm-serial-aetr-v1.3.3.20.bin
- install micro sdcard into Tx
- boot Tx ignoring any errors
- press SYS button
- press Page> button
-cursor should be on FIRMWARE
-press roller
- scroll to Tx16x firmware file tx16xf6dd140e.bin
- press roller and select Flash bootloader
- when "flash finished"
- press RTN
-power off
- power on while holding T4 and T5 towards center
- let go of power button
- on screen is "write firmware"
- select "write firmware" and press roller
- select Tx16s firmware file and press roller
- hold roller down long time to start flashing process
when finished your Tx is fully running the new firmware


How to flash the Multi 4-1 internal module
NOTE: We are flashing the INTERNAL module
- boot Tx ignoring any errors
- press SYS button
- press Page> button
-cursor should be on FIRMWARE
-press roller
- scroll to multi firmware file mm-stm-serial-aetr-v1.3.3.20.bin
- press roller and select "Flash Internal Multi"
when finished with "Flash successful" your Multi 4-1 is running the new Multi firmware






- select