OPLM CC - CC3D - Atom Hardware Setup¶
This page will walk you through how to set up the hardware connections that are required for CopterControl, CC3D and Atom OPLink operation. All OpenPilot boards support connection with the OPLink module. The OPLink connection can be used for telemetry and/or vehicle control.
The OPLink module will get it’s power from the flight controller’s external power, so unlike Revolution, the modem will not get powered on by just plugging in the USB to the flight controller. Make sure that you have the same OpenPilot firmware versions on both the flight controller and OPLink modem. All the examples below are shown with a CC3D flight controller board, but they can be applied to CopterControl and Atom, also.
The OPLink will be set up to talk bidirectional telemetry with the flight controller. You can use a regular OpenPilot 4-pin JST SH cable to connect the two boards. It is recommended to use Main port for both boards, but you can also use other ports to connect telemetry. Just remember the changes in the Configuration steps below. Connect the boards like in the diagram:
Telemetry and vehicle control¶
If you also want to use OPLink modem for vehicle control, you’ll need to add one additional wire from the TX pin of the OPLink to the PPM input pin on the flight controller. In this diagram the wire goes to PIN 8 on the controller, because that is the pin that allows OneShot125 and PWM Sync with CC3D. Revolution PPM remains on PIN 3.
Change the flight controller and OPLink Mini configuration to reflect the wiring changes that have been made. This is where it all becomes pretty rational. After these configuration steps, you are ready to proceed with OPLM Binding and Basic Telemetry.
Flight controller configuration¶
- Connect to the flight controller with USB.
- From the Configuration tab, navigate to the Hardware page in the GCS.
- From the Main Port drop down menu, select Telemetry
- From the Telemetry Speed drop down menu, select 38400
- Click Save, wait a few seconds for the telemetry gadget (the meter at the bottom of the GCS) to calm down, and then disconnect from the flight controller.