This dataset supports the paper entitled "Real-time Room Occupancy Estimation with Bayesian Machine Learning using a Single PIR Sensor and Microcontroller" for the Sensors Applications Symposium 2017. Data Supporting Figures: Table I - Specification of the microcontrollers used in the experimental setup. Table II - Results for computation time, memory consumption and current consumption of the algorithm on the microcontrollers. Figure 4 - Battery lifetime and execution time over a range of frequencies on the Cortex-M0 and for the FPU enabled and disabled on the Cortex-M4F.