Yes, I installed everything on the Raspberry Pi linke Enzo wrote on his homepage.
I solved my problem now. The problem is not the ping time. The MTU value was too high (it is set to 1500 Bytes in OpenVPN by default) I had to put the following lines in the system-config file on the raspberry Pi and in the *.ovpn-.File which is used on the remote computer to connect to the server:
With an MTU size of 1300 bytes, everything works flawless and no current drops during sendig happens again.
I hope someone other can use it who wants to control the radio remotely. Now I can use also the tehering hotspot from my smartphone to use the radio from everywhere.
I also have huge problems with remote operation.
There are no problems when connected directly to the PC. But when Sunsdr2DX is at the remote site, I have various problems. I have a very good and fast connection via the HAMNET (WLAN 5GHZ) with high bandwidth, 50Mbits and ping rates of 2-10 ms. In between are 3 routers, my home, one at the remote location and one in the middle. In order to even reach the SDR, I had to do pull-ups. The SDR sends its data in the blue, but it did not reach me.
A friend of mine set up a VPN tunnel for me. I don't remember exactly what was set. Apparently the TX status is sent with every TCP or UDP packet, and if the SDR does not get a new packet within milliseconds, the transmitter drops out. Of course that's crap. The function is important, but it would certainly be enough within seconds. Above all, I don't understand why such a high bandwidth is required when sending. My question: What else do I do to use my new DX as planned?