Watshome YT6018-2 weather station

Watshome YT6018-2 weather station

SpaceLen.zip Arduino library

The Watshome wireless sensor is realy a Fujian Youtong device see http://www.youtonggroup.com

With the protocol analyser from www.nethome.nu I got the following sample:

Error creating thumbnail: Unable to save thumbnail to destination

The 8ms gap is the start of the package. Is is a space length protocol like X10. A '1' is a pulse followed by a gap of three times the pulse duration. A '0' is a pulse followed by a gap of the same duration as the pulse.

so in the example the package is:

1111 1010 1010 0000 1100 1011 1111 0000 0000
---- ---- --CC TTTT TTTT TTTT ---- ---- ----
       
CC is the channel
00 ch1
01 ch2
10 ch3

T is the temperature times 10

In the above example the temperature is 0000:1100:1011 which is 203. So it is 20.3 degrees Celsius.

Error creating thumbnail: Unable to save thumbnail to destination

1111 1010 1000 1111 1101 1011 1111 0000 0000
---- ---- --CC TTTT TTTT TTTT ---- ---- ----

the sensor on channel 1 has 1111:1101:1011 which is -37. -3.7 degrees Celsius.

The first byte seems to change over time. now it's 11000111. maybe it's a battery status.