Convert a TFA/La Crosse OMO-M-05/TX58UN-IT to TX58-IT and viceversa

I owned both a WS28xx weather station for US and EU market. The US station works at  915Mhz but the thermo hygro and the receiver was defective. Now the rain sensor of my EU unit doesn’t work any more.. With the help of a rtl-SDR adapter, I’vee the confirmation that the rain gauge of my …