Forum >HELP with A02YYUW Waterproof Ultrasonic Sensor
HELP with A02YYUW Waterproof Ultrasonic Sensor

Hi,
I am looking for help with the A02YYUW Waterproof Ultrasonic Sensor that I just received. I am using a Raspberry Pi 4 with Buster installed. I am trying to get some measure, for that I have followed the instruction from the wiki (https://wiki.dfrobot.com/A02YYUW%20Wate ... 1#target_3)
I have enabled UART following this procedure:
Many thanks,
lls
I am looking for help with the A02YYUW Waterproof Ultrasonic Sensor that I just received. I am using a Raspberry Pi 4 with Buster installed. I am trying to get some measure, for that I have followed the instruction from the wiki (https://wiki.dfrobot.com/A02YYUW%20Wate ... 1#target_3)
I have enabled UART following this procedure:
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Then, I have created a test .py file with the following content: Start raspi-config: sudo raspi-config. Select option 3 - Interface Options. Select option P6 - Serial Port. At the prompt Would you like a login shell to be accessible over serial? answer 'No' At the prompt Would you like the serial port hardware to be enabled? answer 'Yes' Exit raspi-config and reboot the Pi for changes to take effect.
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Now, when I run this file I get the following output:# -*- coding:utf-8 -*- ''' # demo_get_distance.py # # Connect board with raspberryPi. # Run this demo. # # Connect A02 to UART # get the distance value # # Copyright [DFRobot](https://www.dfrobot.com), 2016 # Copyright GNU Lesser General Public License # # version V1.0 # date 2019-8-31 ''' import time from DFRobot_RaspberryPi_A02YYUW import DFRobot_A02_Distance as Board board = Board() def print_distance(dis): if board.last_operate_status == board.STA_OK: print("Distance %d mm" %dis) elif board.last_operate_status == board.STA_ERR_CHECKSUM: print("ERROR") elif board.last_operate_status == board.STA_ERR_SERIAL: print("Serial open failed!") elif board.last_operate_status == board.STA_ERR_CHECK_OUT_LIMIT: print("Above the upper limit: %d" %dis) elif board.last_operate_status == board.STA_ERR_CHECK_LOW_LIMIT: print("Below the lower limit: %d" %dis) elif board.last_operate_status == board.STA_ERR_DATA: print("No data!") if __name__ == "__main__": dis_min = 0 #Minimum ranging threshold: 0mm dis_max = 4500 #Highest ranging threshold: 4500mm board.set_dis_range(dis_min, dis_max) while True: distance = board.getDistance() print_distance(distance) time.sleep(0.3) #Delay time < 0.6s
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Can someone please help me to resolve this problem?Traceback (most recent call last): File "demo_get_distance.py", line 21, in <module> from DFRobot_RaspberryPi_A02YYUW import DFRobot_A02_Distance as Board ImportError: No module named DFRobot_RaspberryPi_A02YYUW
Many thanks,
lls