JSN-SR04T Ultrasonic Sensor Module

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 -
  4. Sensor is working fine till 2.5meter. after 2.5 meter we are getting random values/readings.
  5. If we are touching the connector (which is default connector) receiving random values/readings.
  6. We replaced the default connector with plain wire, after we are not getting correct values/readings.

Thank You

How are you powering your sensor?