REDWOOD CITY, Calif.--(BUSINESS WIRE)--Silver Spring Networks, Inc. (NYSE: SSNI) today announced financial results for its second quarter ended June 30, 2015. Second Quarter Results (all comparisons made are against the prior year period, unless otherwise stated) Non-GAAP revenue $69.1 million, up 9%. GAAP revenue $77.2 million, up 85%. Non-GAAP gross margin 42%, up 10 points. GAAP gross margin 26%, down 6 points. Non-GAAP net income $1.1 million versus a net loss of ($9.9) million. GAAP net lo