# Can' connect between FrSKY D4R-II and flight core m500 Source: https://forum.modalai.com/topic/59/can-connect-between-frsky-d4r-ii-and-flight-core-m500 Category: General Questions (https://forum.modalai.com/category/2/general-questions) Posted: 2020-12-16 05:33:18 UTC by mr TOKI Replies: 5 · Views: 2682 ## mr TOKI · 2020-12-16 05:33:18 UTC I have been try to connect another reciever from FrSky to Flight Core of Voxl m500 but it seem didn't work rigtht . My reciever had been binded with transmiter but when I run QGroundControl and use transmiter to control , QGC didn't have any signal . ## Reply by mr TOKI · 2020-12-16 05:36:27 UTC https://drive.google.com/drive/folders/1B42BBlrNK3JpkPtAO92ZF6bj5B3BVaDL?usp=sharing ## Reply by modaltb (ModalAI staff) · 2020-12-16 16:34:57 UTC Hi @mr-TOKI , First off, nice name! Second, thanks for the pics. We've tried with the X8R model using the following setup. It required 5VDC, and the RC input port is 3.3VDC, so we had to pull 5VDC off a different port as shown here: https://docs.modalai.com/flight-core-connections/#rc-receiver ![Untitled.png](https://forum.modalai.com/assets/uploads/files/1608136493427-untitled.png) ## Reply by mr TOKI · 2020-12-17 00:49:44 UTC (in reply to modaltb) @modaltb oh I see. Thank you and I will try to do it ## Reply by mr TOKI · 2020-12-17 01:47:55 UTC (in reply to modaltb) @modaltb said in [Can' connect between FrSKY D4R\-II and flight core m500](/post/195): > X8R I wired as picture and followed the doc as you send. But I still can't use my transmiter to control it eventhough led from RC was green. I still can't find the problem . Please help me ## Reply by modaltb (ModalAI staff) · 2020-12-17 06:06:17 UTC Can you connect the Flight Core to QGroundControl using USB, and then go to the MAVLink console? You can run `rc_input status` from there and check if you see anything: ![0066d34f-b16e-484e-8d72-a3cc5ee1b909-image.png](https://forum.modalai.com/assets/uploads/files/1608185111267-0066d34f-b16e-484e-8d72-a3cc5ee1b909-image-resized.png)