Table 1: Components of Low-cost Ultrasonic Walking Stick for Blind Fig 2: Block Diagram Smart Blind Stick The device is start by powering on the switch button which is start in Figure 1, according to the written code in Arduino microcontroller initialized and active the GPS module which is used to receive data from satellite, that provides location information and helps in real-time tracking. The GPS module is connected to Arduino microcontroller through a UART interface, and while the user is outside his/her home, the GPS receiver receives the signal from satellites. The output of the GPS receiver has many sentences, such as GPGGA, GPGSA, GPGSV, GPGLL, GPRMC, and GPVTG. But for this project, we needed only GPRMC, so a code was set to show only a GPRMC sentence. These sentences are in National Marine Electronics Association Fig 4: GPS Module Fig 5: Components Coupling Fig 7: Finished Smart Walking Sticks Fig 6: Coupled Components Fig 8: Testing of the Smart Walking Stick
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