My RTL500 only seems to work as a light when paired to my Garmin Edge 130. It appears to work fine, and be a pairing issue. Here is some background:
When pairing, it only comes up as a light, so I select this
The Edge 130 says the light is connected, but has no radar symbol in the top right (concentric rings)
The radar/light flashes as cars approach, but none of this is displayed on my Edge 130. I.e. no warning.
I have tried to pair my Garmin Forerunner 245 watch and again can only see the RTL500 as a light.
Out of interest, I have cycled with a friend for several years and he also has an RTL500 unit. I presume my Edge 130 was wrongly paired with his as it used to work fine. However, it didn't work properly on a recent solo ride. When I investigated, it was paired as a light (perhaps the only option) and I unpaired it and then started again. No success. I also tried resetting the Varia unit (holding the button for 8 seconds to turn it off).
Any help is greatly appreciated!