A system and method to collect gesture input through wrist tendon and muscle sensing are disclosed. A particular embodiment includes: a sensor array integrated into a wristband, the sensor array including a plurality of pressure sensors positioned for contact with particular locations on a wrist of a user wearing the wristband； and a controller unit, the controller unit including a communication interface, the controller unit being configured to: receive a plurality of sensor signals generated by the sensor array, the plurality of sensor signals corresponding to movement detected at particular locations on the wrist of the user； convert the plurality of sensor signals to a digital representation； generate a composite data packet by combining the plurality of converted sensor signals into a composite digital value； and provide the composite digital value to a processing unit of a wearable device for use in control of a user interface in the wearable device.
