A02YYUW Waterproof Ultrasonic Sensor FAQ【SEN0311】
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Q1:SEN0311 sensor returns no data when connected to Raspberry Pi.
A1:Enter the following command in the Raspberry Pi terminal:
sudo nano /boot/cmdline.txt
Add dwc_otg.lpm_enable=0 as shown in the figure below, and delete console=serial0, 115200
![](https://dfimg.dfrobot.com/628da052aa9508d63a41e164/makelog/25e48bb5faba8a40cec2fe6817dc2713.jpg)
Open config.txt by enter:
sudo nano /boot/config.txt
and add dtoverlay=pi3-miniuart-bt
![](https://dfimg.dfrobot.com/628da052aa9508d63a41e164/makelog/a1b8d08268ac17f1fd4d9238733fdce3.jpg)
Reboot and check, if there's still no data, try to add console=ttyl in cmdline.txt and reboot again.
![](https://dfimg.dfrobot.com/628da052aa9508d63a41e164/makelog/2eecce52db032e337455c13dd51f3e61.jpg)
If you have other questions, just feel free to post them in our forum for consultation. We will reply them as soon as possible and improve the product FAQ gradually.