A year ago, Microsoft’s decision to join the AllSeen Alliance – which backs Qualcomm’s AllJoyn technology as a de facto standard for IoT device discovery and connectivity – highlighted the software giant’s growing closeness to the chip supplier, and its rising acceptance of the open source model. Since then, it has become more than just an interested bystander in AllSeen. In November it revealed that the upcoming Windows 10 would include the AllJoyn software stack. And now, it has donated its Device System Bridge (DSB) software to the AllJoyn cause and open sourced the code, signaling another win for the protocol. The DSB was released by the AllSeen Alliance this week, with the promise that it “enables interoperability with legacy…