Upgrade ES900RX Goto https://www.expresslrs.org for latest info. And also GitHub expresslrs Download latest Expresslrs configurator. Press Build After that bin file should be shown like this Power on RX. Wait like 1 minute. New WIFI with SSID ExpressLRS RX should be there. Connect to it. Open browser http://10.0.0.1 and load this bin file. Wait till it is reset. Done Upgrade ES900TX Upgrading using WIFI does not work from stock Happymodel firmware. * Remove module from TX16S JR bay. * Open it - 4 screws. * PINS are configured like 1,2,3,4 OFF 5, 6 ON Oscar Liang says something different maybe: https://oscarliang.com/setup-expresslrs-2-4ghz/#flash-tx-firmware-via-wifi Happymodel TX module, it requires an extra step for UART flashing to work. On the TX module board, there are 6 jumpers, by the default the middle two are bridged. When flashing via USB/UART, you should move the jumpers down to the bottom two pins. * install driver CP210X if not already * Connect ...
