Ultrasonic Sensor Module JSN-SR04T ISSUES

[pranit]

We are facing some issues as well as we have some queries related to the Ultrasonic Sensor Module JSN-SR04T.

Queries -
1. We want to extend the length of wire/cable of JSN-SR04T Ultrasonic Sensor Module, so how can we achieve this?
2. Can we cut default connector of JSN-SR04T Ultrasonic Sensor Module and used some plain wire to extend it?
3. Guidelines to change the frequency of the sensor - how to use the connected variable transformer to change frequency.(you can check attachments)
Issues -
1. Sensor is working fine till 2.5meter. after 2.5 meter we are getting random values/readings.
2. If we are touching the connector (which is default connector) receiving random values/readings.
3. We replaced the default connector with plain wire, after we are not getting correct values/readings. (if we connect wire upto 25 cm long it is working fine. if we increase the length of wire then getting incorrect values/readings).

for image refer this link-
https://forum.arduino.cc/index.php?topic=627987.0
Thank You

[vojtishek]

Hi, Im using this sensor in water tank as the HCSR04 destroyed by humidity in a days.
Currently measuring for month stable values. Maximum tank measure height is 3m. Accuracy +- 100 litres, sufficient for me for 9000 litres tank.
Please provide what is your setup, what controllel you are using etc. Im using wemos d1, both in plastic boxes to minimize humidity influence.

Unfortunately cant help you with frequency settings as I didnt tried that.