Optimizing Connection Establishment and Parameter Adaptation in Bluetooth Low-Energy for Intermittently-powered Devices

The growing field of research into batteryless or intermittent systems has enabled Internet of Things applications that were previously impossible. For example, the FreeBie system recently introduced Bluetooth Low-Energy (BLE)<br/>to intermittent devices, making medium to long range bi-directional communication a reality for the first time....

WhirlWind: Wind Energy Harvesting Wireless System for Sensing Angle of Attack and Wind Speed

Time-sensitive intermittent computing meets legacy software

Tiny energy harvesting sensors that operate intermittently, without batteries, have become an increasingly appealing way to gather data in hard to reach places at low cost. Frequent power failures make forward progress, data preservation and consistency, and timely operation challenging. Unfortunately, state-of-the-art systems ask the...

Continuous Sensing on Intermittent Power

Battery-free energy-harvesting devices have the potential to operate for decades, since they draw power fromvirtually unlimited energy sources, such as sunlight. However, ambient energy sources are volatile, and tiny harvesters can extract only weak power from them. Thus, small energy-harvesting devices operate intermittently: first, they charge...

Testing Energy Harvesting Devices Realistic and Repeatable

The Internet of Things is a promising vision which enables trillions of sensor devices to be connected. A common bottleneck for such devices is the energy supply. Using batteries is expensive, it reduces the device lifetime and has a negative impact on the environment. Energy harvesting provides a more sustainable solution. Unfortunately,...

Dependable Dynamic Checkpoints for Batteryless Devices

Tiny batteryless sensing systems that do not have a constant supply of power have become an increasingly appealing way to gather data, in hard to reach places, at low cost. These systems suffer from frequent and unpredictable power loss. Preserving information through power failures is an ancillary challenge. Unfortunately, state-of-the-art...