Identifying actual problem

[VK4LGW]

I’ve had pi-star setup on a Raspberry Pi 3B ver 1.2 with an MMDVM HS HAT (Number 397). I haven’t used it in a long time, but now I’ve decided I want to again. It’s been so long since I used it that I’ve forgotten anything I knew about it.

I’ve made fresh installation of pi-star (I was on 3.something) and updated the hat firmware to 1.5.2

Pi-star boots. The dashboard comes up. It shows it’s connected to YSF (or DMR if I change configuration). Nothing is transmitted or received via RF.

To help me fault find and work out what’s happening, I just want to ask about how pi-star works. Is it pi-star which makes the connection to the reflector? Or is it the hs_hat? I’m trying to work out whether the problem is likely with the raspberry pi or with the hs_hat.

[VK4LGW]

My guess is either you've got a configuration mistake, or you installed the wrong firmware on your hat, or you haven't set the offset frequencies correctly or at all

You were correct.

I have a rev 1.6 HS_HAT.

I didn't set offset frequencies. I planned on checking that, as per your suggestion. But obviously I'd need to have the right firmware, so I checked that first. I couldn't work out how to identify what speed it should be working at. The dashboard was reporting 14MHz TCXO, but I didn't know there were different versions when I updated it a week ago. I ran the update and installed firmware for the 12MHz TCXO. It now all works.

Thanks again for your help.