add -r and return 1 if clouds<1800

Auxiliary_utils/Weather_chk/Readme.md

@@ -7,12 +7,13 @@ Check meteostation parameters
     
       -d, --devname=arg   serial device name
       -h, --help          show this help
+      -r, --raw           show raw information from meteostation
       -s, --speed=arg     baudrate (default: 9600)
 
 
 Output: 
 Rain=0/1
-Clouds=0/1
+Clouds=xxxx
 
 Return value:
-0 if no rain, 1 if there's rainy
+0 if no rain and Clouds>1800, 1 if there's rainy or Clouds>1800