A Flexible-Integrated Multimodal Hydrogel-Based Sensing Patch

• A flexible multimodal proximity–pressure–temperature sensing patch with a simple structure was developed. • Thanks to structural design and material synthesis, the sensor has an outstanding temperature sensitivity of 0.5 °C−1 with good linearity, a high pressure sensitivity of 30.6 kPa−1 and a non-contact sensing range is 2 m. • After the multimodal sensing patches are integrated at different locations of the pillow, the sleeping conditions can be monitored comfortably. • The integration of a one-dimensional convolutional neural network enables tracking of head movement and recognition of bad sleep patterns, offering a promising approach for unconstraint sleep monitoring.