Testing the sonar’s distance within a certain accuracy was the goal of this test. The range for a feedback of each light is 0 ≤ green ≤ 4, 4 <yellow ≤ 8, red > 8. These were the constraints put into the Arduino code. In the end, the constraints were feasible because it passed this test. We wanted the sonar’s distance to be within 0.3 cm of the input. As seen on the chart, both the yellow light and red light were achieved within the +/- 0.3 cm. The communication device had the correct display for every trial.

NRF24L01 transceivers communicating to each other. When there is no obstruction, the transceivers can communicate in an average of 93.3 meters. When the transceivers were outdoors in an open windy field, the average distance was 26.6 meters. This lowers greatly due to wind obstruction by causing refraction in the waves between the two transceivers. The last test is the most valuable. How far can the transceivers be when there are bathroom stalls and a wall in between. The average was 15 meters when conducting the test through the walls. One person was outside the bathroom door acting as a custodian walking past, while another was inside with the toilet paper dispenser. In the end, we believe if we attach an antenna to the transceivers, the range will increase and be more feasible for the custodians if TinkleTimes is used in real time.