DFRobot SEN0491 Laser Ranging Sensor UART

DFRobot SEN0491 Laser Ranging Sensor UART can detect objects in the 4~400cm range with ±2cm accuracy. With three measurement modes supported, it is well applicable to various detection scenarios like security gate detection, access control systems, security alarm devices, smart trash cans, smart cars, or robots for obstacle avoidance. The sensor metal black shell adopts a threaded barrel design, and its probe comes with an optical cover. The integrated design makes the product able to filter optical interference, waterproof and shockproof. The DFRobot SEN0491 uses an invisible laser, and there is a voltage regulator circuit inside the module. By featuring a stable performance and UART output, the sensor has an alarm output line that will be triggered to output low steadily when the measurement distance is smaller than the user-set threshold.