The first generation iPad (with the thick, curved back)
can only run iOS 5.1.1 - In this case, the Sonos app will likely not be available in the App Store and will not be able to connect to an up-to-date Sonos system.
On June 11, 2012, it was announced that iOS 6 would not be released for the first-generation iPad, making iOS 5.1.1 the final operating system officially available for the device.
If you'd like more information on Sonos controller requirements,
check out this helpful FAQ.
Building community is like building a garden. You build the frame, till the ground, plant the seeds, feed the plants & sometimes you gotta pull the weeds.