A biosensor control module is integrated in a vehicle and includes a transceiver configured to communicate with a plurality of PPG circuits. The PPG circuits have different locations, including a control button of the vehicle, key fob or steering wheel. The biosensor control module receives first spectral data including PPG waveforms from a first PPG circuit at a first location. The biosensor control module also receives second spectral data including PPG waveforms from a second PPG circuit at a second location. The biosensor control module combines the PPG waveforms from the first spectral data and the second spectral data to obtain health information of a user.