Setting motor mixes on CleanFlight
Reference: http://www.rcgroups.com/forums/showthread.php?t=2461697&page=103
To correctly set the motor layout of ER250 to CleanFlight, run the following commands:
mixer custom mmix reset mmix 0 1.0, 1.0, -0.882, -1.0 mmix 1 1.0, -1.0, -0.882, 1.0 mmix 2 1.0, -1.0, 0.882, -1.0 mmix 3 1.0, 1.0, 0.882, 1.0
Another mix: http://www.rcgroups.com/forums/showpost.php?p=33394173&postcount=3851
mixer custom mmix reset mmix 0 1.0, -1.0, 0.93, -1.0 mmix 1 1.0, -1.0, -0.93, 1.0 mmix 2 1.0, 1.0, 0.93, 1.0 mmix 3 1.0, 1.0, -0.93, -1.0
Guide to install CleanFlight specifically onto ER250
Part 1: https://www.youtube.com/watch?v=3ZW0dghsIig
Part 2: https://www.youtube.com/watch?v=yS2xzwVUoc0
PID Tuning with BetaFlight / CleanFlight and LuxFloat V2
Reference:
Post in RCGroups Echine Racer 250 forum
set pid_controller = 2
set looptime = 800
set p_pitchf = 1.400
set i_pitchf = 0.550
set d_pitchf = 0.035
set p_rollf = 1.100
set i_rollf = 0.350
set d_rollf = 0.027
set p_yawf = 3.000
set i_yawf = 1.000
set d_yawf = 0.005
set gyro_lpf = 0
set gyro_cut_hz = 60
set pterm_cut_hz = 40
set dterm_cut_hz = 15
set rc_rate = 100
set rc_expo = 70
set rc_yaw_expo = 40
set thr_mid = 50
set thr_expo = 0
set roll_rate = 47
set pitch_rate = 47
set yaw_rate = 40
set tpa_rate = 50
set tpa_breakpoint = 1500
References
Configuring Eachine Lost Alarm Buzzer on Taranis
http://www.rcgroups.com/forums/showthread.php?t=2461697&page=251#post33377490
Factory Settings Backup for Open Pilot