After the disapointment of low range with th 433Mhz modules, I have begin tinkering with a ESP8266 module. I have chosen a ESP-07 because it has an antenna connector.

I connected it to a pressostat, and set up some timers in lua. I get consistent and stable readings off the pressostat. But I will have to rethink the power management and program the wifi comunication. That will happen a day in the future....

(It have been a rainy summer and water has not been a problem this year as it was when the project was started....)