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Connect digital weather sensor
#41
/edit
Hi Guys,
Based on the input of Pierre - I used rtl_433 to record a GT-WT-02 device (bought from Lidl Austria, same results as the other devices described here, GT seems to be globaltronic).

rtl_433 knows a protocol for GT-WT-01 (prologue) which seems to work for (GT-WT-01) - see (https://github.com/merbanan/rtl_433/blob.../rtl_433.c)

With this protocol as cheat sheet one can extract the following behavior:

-> Button Press information
-- normal report from sensor
11000010 10000000 10111111 01100001 01001000
-- Transmit Button Request
11000010 11000000 10111111 01100001 01001000

-> Sensor Channel Information
- Channel 1:
11000010 11000000 10111111 01100001 00000000
- Channel 2:
11000010 11010000 10111111 01100001 00000000
- Channel 3:
11000010 11100000 10111111 01100001 00000000

-> Battery impact
- Old Battery (low battery sign is on)
11101110 10000000 11011011 01011100 00101000
- New Battery (no sign is on)
11101110 00000000 11011011 01011100 00101000

Concluding (counting from 0):
Battery status - bit 8
Button Press - bit 9
Channel Encoding: bit 10,11


checking for the odd/even bits:
Code:
11111001 00100001 00010111 01001001 01111000 temp= 279, humi=36
11111001 00100001 00010101 01000111 01011000 temp= 277, humi=35
11111001 01100001 00010101 01000111 01111000 temp= 277, humi=35
11111001 00100001 00010011 01000111 01001000 temp= 275, humi=35
11111001 00100001 00001100 01000111 10001000 temp= 268, humi=35
11111001 00100000 11111111 01001010 00110000 temp= 255, humi=37
11111001 00100000 11111101 01001100 00110000 temp= 253, humi=38
11111001 00100000 11111100 01001100 00101000 temp= 252, humi=38
11111001 01100000 11111011 01001110 01010000 temp= 251, humi=39
11111001 01100000 11111011 01001110 01010000 temp= 251, humi=39
11111001 00100001 00000110 01001011 01111000 ...
11111001 01100001 00010100 01000101 01100000
note - bit 31 matches bit 15

best,
phil
 
Reply
#42
Thanks for your positive post. Can you however edit your post in regard to the protocol thread sticky.
 
Reply
#43
Hi Curlymo,

Ok, sorry for my spamming. I re-edited the post and removed the gossip.

I think the last bits seem to be odd/even kind of information.

best!
 
Reply
#44
As far as i read this thread it should already be supported by the alecto_ws1700 protocol.
 
Reply
#45
Not here. Move your post to the nightly discussion threads.
 
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