At Computex 2015, ARM launches their new ARM Cordio Radio IP ultra low power Bluetooth LE 4.2. It has an analog RF component, a digital baseband modem component and mbed IoT subsystem running on an ARM Cortex-M3, based around the mbed OS and mbed device server allowing to build a solution around IoT devices and to connect them to the web. The ARM mbed OS runs on ARM Cortex-M devices. ARM is partnering with TSMC using their 55ULP process to dramatically lower the power consumption getting a 40% reduction in dynamic power consumption and a 25% reduction in the leakage.

You can read more about ARM Cordio and ARM's new IoT subsystem here: http://www.arm.com/about/newsroom/arm-de-risks-design-cycle-for-iot-chips.php