Featured are devices (e.g., peripheral devices) and systems that interact with a device having sensors (e.g., a wearable device or device configured for use with a piece of equipment, such as a vehicle) to receive and process data (e.g., physiological data) from the sensors. Also featured are computer implemented methods including software (e.g., an application) for receiving and processing data by the peripheral device. An application that communicates with the device (e.g., wearable device or equipment device) and sensor information processed by the application or a device running or accessing the application provides situational awareness for users in adverse conditions, such as during combat or wartime. The wearable device may include one or more inflatable bladders configured to apply pressure to a wound site for treatment.