To use SBUS you need to turn on Serial RX on UART3 and set the receiver mode to RX_SERIAL.
How to connect SBUS - version A - (sometimes this does not work)
How to connect SBUS - version B - (solder it to the board)
Using Smart Port
To use Smart Port you need select SmartPort on UART2, before turing on the telemetry configuration
Using this inital PIDs
First check global minimum and maximum throttle values of of your transmitter/receiver
Second identify minimum throttle value bringing motors to spin. (Do ESC calibration if required)
Add global minimum value to Minimum Throttle
Add global maximum value to Maximum Throttle (max limit is 2000)
Add minimum value to start motors Minimum Command (maybe add 30-50 to actual minimum)
Problem with newest version (1.14.2)
With version 1.14.2 the red LED blinks 5 times, which maybe indiacates a problem with data EEPROM. The system will not turn on the motors in this state. I didn't found a solution to work with 1.14.2.
I solved it by using version 1.14.1
Bind the receiver to the transmitter module first and turn on both the transmitter and the receiver
Move the controls to desired failsafe position for all channels
Press briefly the F/S button on the receiver and you are done
Failsafe in default will hold last position before signal is lost. This usually ends up in loosing the UAV or worse.
Telemetry lost and recovered on Taranis
Since I updated Taranis, I constantly get telemetry lost ... telemetry recovered messages, even if there is just 1m distance with perfect antenne alignment.
It looks like this a just an annoying bug. Also if it reports telemetry lost, the telemetry is still working.
EU / Non-EU issue
If the binding fails (solid red light instead of blinking), then you probably have a firmware mismatch.
You either need to change the firmware of the transmitter or the sender, so that both are either EU or Non-EU.
CPPM mode can not handle all eight channels at the same time with all throws are maxed out, as it does not have enough frame gap.
It is recommended to use at most six channels from CPPM channel while leaving off the rest two channels, otherwise improper performance might occur.
FrSky Firmware Update from Marek Hanuliak
The FrSky Taranis uses a firmware that is customised and exclusive to FrSky. It is not part of the OpenTX team’s offerings and development cycle. It needs to be downloaded directly from frsky-rc.com
Configuring CC3D Atom with LibrePilot can be annoying:
No USB connection possible with OSX 10.11.6 and LibrePilot GCS 16.09, including SiLabs USB driver.
Working: OSX 10.12.2 and LibrePilot GCS 16.09, without any additional USB driver.
In case of any strange GCS behavior: Reboot CC3D. Also update firmware matching GCS version.
ESC calibration: Can be tricky. Needs proper timing when disconnection the battery.
OneShot support didn’t work.
Pick receiver Port
Use PMW or PPM, regarding your receiver.
Configure Motor Output
Map channels of CC3D to ESC. Also map channel 6 to acessory0. Channel 5 is for the mode. Use the "Vehicle Setup Wizard" if things won't work.
Highly recommend to use the "Transnmitter Setup Wizard". Afterwards double check values.
Configure Flight Modes
In this example a 3-way switch on receiver channel 5 is used.
Define how to start the motors.
All attempts useing something else than PWM failed. Here you also can test the motors individually.
Configure flight characteristics
CC3D Atom Mini
Sensors and Components
3-axis Gyroscope array: IDG-500 and ISZ-500
3-axis Accelerometer: ADXL345
Supports several common RC inputs: 6 PWM channels, combined PPM, Spektrum/JR DSM2, DSMJ, DSMX satellites, and Futaba S.Bus receivers
Onboard USB connectivity for easy configuration
USB and serial telemetry and configuration (including wireless with optional radio modules)
4 Mbit onboard memory
TAROT FPV racer TL250A
The TAROT FPV racer TL250A is cheap, light and quite robust. The only thing which quickly breaks is the lading gear.
First FPV test with car
The flight quality is over the average. But I will not use them with KDE1806XF-2350 motors.
These Propeller are too soft and extremly chewy. The don't break, the just bend and break the shaft of the motor.
Maybe other motors feature a more robust motor shaft.
Also don't buy this motor. A KDE1806XF-2350 2350Kv with KDEXF-UAS20LV 20A. They are too expensive and the ESCs are heavy and big.
ALIGN MR25P RM42503XT
Basic lessons learned:
Frame size: 250mm, 390g without battery
ESC: 3-4S (4S Max 5" props)
Motor: RCM-BL2205, 2400KV
Video Transmitter: 5.8GHz, 25mW~600mW, RP SMA (no idea how to adapt transmission power
Video Camera: Can record up tow 1440P 30FPS (v2) or 1080P 60FPS (v1). 32GB SD
After a crash, one of the ESCs died. A new board with ESCs is 90$. 
The dynmaic range and brightness adaptation of the camera is bad.
Basic lessons learned:
It needs training
Until you're not a professional, it makes no sense to buy expensive motors and ESCs.
They crash all the time. Buy many propellers
Don't buy off the shelf RTF racers like the MR25 with fully integrated PCBs. It's impossible to exchange broken parts.
More technical lessons learned:
Frame: Pack all the electronics between two carbon plates
Battery: If there is space, also protect the battery. Maybe by a carbon plate attached to a battery strip. I usually buy cheap LIPOs from hobbyking with good user rates. Don't expect them to live long. But, it looks like there are more durable batteries like the: STRIX Power Stix 1550mAh 4S 95C
Telemetry: You get good value for money with FrSky. Choose a receiver supporting SBUS and SMART-Port
Motors: A solid 5mm center shaft seems to fit to many propellors and it doesn't break/bend too fast. On YouTube, there's a lot motor recommendations.
Flight Control: Currently, I'm happy with SP RACING F3. They support cleanflight, SBUS, S.Port, ...
ESCs: Up to now, I never managed to bring a HELI or ONESHOT ESC to live. Failed with SP RACING F3 and CC3D. I will try some more ECSs.
Video: I'm happy with the RunCam Owl Plus 700TVL. But there are betters supporting Wide Dynamic Range.
Dampening: I made good experience with small silicone buffers. If possible integrated into the frame
Matek WS2812B LED
This cool device can be used with the Seriously Pro Racing F3.
Every single LED can be addressed by using Cleanflight interface.