Yes, I tried Infield, but I don't have a firmware file newer than 5.2.28 I already have. I want to upgrade because my IP150 module keeps losing network connectivity (stops responding to pings) every now and again. It goes away and then comes back later on its own. I am hoping an upgrade will fix it.
I notice the latest firmware file you have on your upload site is below 5.2.28. It seems the only way to update to 5.6.14 is via the app (which doesn't work). I will try to decompile the app APK and see if there is a clue for fetching the latest FW.