Many Thanks. Just ordered TTL USB board. Hopefully will work if I am lucky.
Guys, maybe this will help. Drone was bought in 2016, had 1 flight, than month ago upgraded. Totally new. So now i have same problem:
[00242782]Version checking[2]...
[00242874][03 06][00] v2.4.20.50 -> v2.4.20.50
[00242959][03 05][00] v34.2.0.9 -> v34.2.0.9
[00243010][04 00][00] v1.48.0.0 -> v1.48.0.0
[00243135][11 00][00] v1.8.0.0 -> v1.8.0.0
[00243262][11 01][00] v1.8.0.0 -> v2.0.0.33, firmware v1.8.0.0 not support.
[00243310][11 01][00] v1.8.0.0 -> v2.0.0.33
[00243413][12 00][00] v1.12.0.0 -> v1.12.0.0
[00243523][12 01][00] v1.12.0.0 -> v1.12.0.0
[00243628][12 02][00] v1.12.0.0 -> v1.12.0.0
[00243727][12 03][00] v1.12.0.0 -> v1.12.0.0
[00256275][15 00][00] device not detected.
[00256363][17 00][00] v1.1.1.7 -> v1.1.1.7
[00256483][17 01][00] v1.0.2.7 -> v1.0.2.7
[00256559][19 00][00] v1.0.8.96 -> v1.0.8.96
[00256604][01 00][00] v1.32.5432 -> v1.32.5432
[00256655][01 01][00] v1.32.5432 -> v1.32.5432
[00269202][08 00][00] device not detected.
[00269300][09 00][05] v4.1.0.0 -> v4.1.0.0
[00269347]Packet upgrade failed at version checking.
BUT! When i fly with the first battery, Everything is perfect, just there is no transmit, sometimes writes "weak signal" And when it out of energy i change battery, and the second one just magically turn transmittion on. I don't understand how it works. Just today tried the third time 1,7km away, and it was working perfectly, outside +13 degrees. But when paste another battery it doesn't work. When i turn home both batteries don't work. Lookes like when smth hit up and it starts to transmit.