I have setup an esp8266 with an ultrasonic ANGEEK JSN-SR04T to detect the amount of available water.
The problem is inside the cistern there is no wifi-connection possible. I have to find another solution to connect to the sensor.
1. is it possible to extend the cable of the sensor about 10meters? This is the distance through the pipes out of the cistern to a place where wifi would be available. If yes, i would only put the sensor in the cistern and put the esp8266 10m away.
2. route the wifi-signals through cable (again 10m) out of the cistern and send it over wifi again to the network.
or are there any other ideas?