I’m having an issue with my Holybro Sik V3 radio’s where they both show they’re connected with a green light, the settings for both loads fine and should be set up right (not sure on this), but when I try to actually connect in mission planner, it times out and gives me the error below. Anyone know what may be the cause? I was also going to try and update them but am not sure how to get these radios into the update mode.
On my Holybro SIK radio the green LED just means power. Sometimes I have to unplug and re-plug to reboot the radio to get the red TX/RX leds. This usually happens if mine was left powered in the USB overnight.
I checked the manual for mine and it says the green blinking is “searching for another radio”, green solid is “link established”, red blinking means “data transmitting”, and red solid means “firmware update mode”.
If so, that LED should not blink if the other side of the telemetry is disconnected.
Does it blink when you disconnect the other side of the telemetry?
And did you check the baud rate for the Serial 1 port on the Pixhawk side?
It means the RF radio is connected, which suggests AirUnit - PC is OK.
FC - UART - Sik V3(Air Unit) - Sik V3(Ground Unit) - USB - PC
Now, it time to check FC’s UART configuration:
SERIALx_PROTOCOL
SERIALx_BAUD
BRD_SERx_RTSCTS
SERIAL1_PROTOCOL is set to 2 or Mavlink 2
SERIAL1_BAUD is set to 57
BRD_SER1_RTSCTS is set to 2 or Auto
Also the FC is a Holybro Kakute H743 Wing
When only one of the radios is powered, it will blink. After powering the second one they both keep blinking for a few seconds than turn solid green. Baud rate is set to 57 on the FC config.
LGTM, maybe it’s wiring issue, check that again.
- RTS/CTS need to be cross-connected.
- Rx/Tx need to be cross-connected.
Simple way to get rid of CTS/RTS issue, check CTS/RTS and ECC(I’m NOT sure if it’s revelant to your issue). Just set as the guide says and make it work first.
https://ardupilot.org/copter/docs/common-configuring-a-telemetry-radio-using-mission-planner.html
So for the wiring to the FC, the sik radio had a 6-pin JST to JST wire and my flight controller just had pins so I cut off one end of the JST wire and soldered on connectors. The sik radio and FC both had labels so I just hooked them up label to label. I am unsure what you mean by cross connect.
You have to connect
FC Tx pin to Radio Rx pin
FC Rx pin to Radio Tx pin
FC RTS pin to Radio CTS pin
FC CTS pin to Radio RTS pin
Okay, I switched over those connections and now it gets past the time out issue but is stuck on the “getting params” screen. I can see in the background that they are communicating and the position is updating in the top left but it just sits on that screen. Anyone know what might cause that? Thanks everyone for your help so far.
Try disable CTS/RTS feature.
I had an issue using USB C to the radio. Switched to USB A on the MP/GCS (computer) side and all was good in the world…cd