Well had a bit of luck after spending all day on this.
arduino uno (sender) Like mentioned by chrisl use Serial.write and not Serial.print
''' if(mySerial.available()) { Serial.write(mySerial.read()) }'''
uno wifi (receiver):
''' Serial.println(mySerial.readString()); ''''
So instead of mySerial.read i used mySerial.readSting This is most likely a obvious mistake to almost everybody here, took me two days. sigh