How to use SEN0301 on arduino
Jeffrey.Tu 2026-01-27 11:06:17 90 Views3 Replies I purchased a sen0301 ultrasonic sensor and tried it on arduino with sample codes on product wiki, and it keeps outputting zeroes. Can anyone help me with that?
if you are using it in right way and still getting zero, wiring, mode, or timing maybe the issue. it operates on 5V.
the SEN0301 comes in serial / PWM / analog modes which one is yours? pulseIn() is used in case of PMW and Serial.read() if its serial.
try to set your code according o this information.
Oliver.Taylor you should check this
https://www.dfrobot.com/product-1887.html?utm_source=chatgpt.com
Hello, an output of 0 is usually caused by wiring issues or a mode mismatch.
Please check the following:
1.Check Probe Connection: Ensure the waterproof probe is firmly plugged into the adapter board; a loose connection is a common cause.
2.Verify Blind Zone: The sensor has a blind zone of about 20-30cm. Please test by aiming at an object 50cm away, rather than covering the probe directly.
3.Confirm Mode & Code: The SEN0301 supports multiple modes (UART/I2C/IO). Please verify that your wiring matches the specific Wiki sample code you are using (e.g., for UART mode, ensure RX and TX are crossed).
Hope that works for you!
JaneYu 
