To add to this: when I run the io.popen from the LUA command prompt on a Raspberry telnet session, I can see that not the Json results are returned but an HTML page with text about insufficient rights. But if I use the exact same URL in any browser, it *does* work, I get Json output immediately ...

Hi! I have exactly the same problem as 'Mace' describes. It seems like no data is retrieved from de Resol DL2 (the line looks empty) and finally it gives a messages about lua_value being nil. Any suggestions how to resolve this ...