Comm.makeJsonRequest in simulator?

I've used this before
Comm.makeJsonRequest("api.openweathermap.org/.../weather",
{"lat"=>lat, "lon"=>lon}, {}, method(:onReceive));


with lat and lon from GPS. It worked but often old data and for a location that was a ways away.

It works in the sim.

What error are you getting? An error code in onReceive()? if there is no error, could it be that the data isn't in the format you expect (like an error message in the data)?