The frsky CSRF Telemety convertor acta as a bridge between frsky and crossfire.
Build is relatively simple.
You will need
- Teensy 3.2
- 2 x 2.4k resistor
The resistors are to enable the two serial ports to operate in single wire mode.
Place resistor across pins 9 and 10. (TX2 RX2) Place resitor across pins 0 and 1 (TX1 RX1)
Connect pin 0 on the teensy to the CSRF pin on the crossfire module. This can be fouund in two locations.
- On the full size module - either on the JR module or the CSRF pin on the module as shown in the Crossfire Manual.
- If accessing the pin via the JR module - this is the lowest pin commonly refered to as the ANT or SPORT pin.
- An example of this can be found here:
- https://oscarliang.com/ctt/uploads/2016/05/flash-frsky-rx-firmware-Taranis_module_bay.jpg
Connect pin 9 on the teensy to the sbus signal on the frsky receiver. Connect pin 8 on the teensy to the s.port signal on the frsky receiver.
Ensure you have supplied power to the devices and a suitable GND connection is shared.
Enjoy!