Hello everyone, I am having problems with the jsn-sr04t V2 sensor and I came to this forum looking for a solution.

In my case I am getting erroneous readings in a cylindrical water tank 3.5 meters high.

I am measuring once a minute (below a sample) and the readings are disparate. Do not match the actual measurement.

109 cm 2019-11-05 21:01:42
141 cm 2019-11-05 21:00:42
90 cm 2019-11-05 20:59:42
168 cm 2019-11-05 20:58:41
170 cm 2019-11-05 20:57:41
111 cm 2019-11-05 20:56:41
143 cm 2019-11-05 20:55:41

I am using a 220V switching power source at 5V and 700 mA maximum. From the food source a Wemos D1 mini (with esp8266) and from the 5V and GND pins to the sensor.

In tests outside the tank, I used the USB power of my notebook and the samples were wrong, however when I powered up with an original Motorola fast-charge charger, the samples were perfect.

Is it possible to think that the 700mA source (from china) is not enough? Or that the power source may be putting some noise to the sensor signal?