Arco: Created page with "Space-len is an easy way to transmit data with, for example, on-off-keying wireless. 433A 66 9340 408 F191519141519191519151515191919191514191515151519191915151519151510 Th..."

2015-08-16T12:50:19Z

Created page with "Space-len is an easy way to transmit data with, for example, on-off-keying wireless. 433A 66 9340 408 F191519141519191519151515191919191514191515151519191915151519151510 Th..."

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Space-len is an easy way to transmit data with, for example, on-off-keying wireless.

433A 66 9340 408 F191519141519191519151515191919191514191515151519191915151519151510

The detection can be done by lokking at "all" odd or even periods.
In the above example the marker is 1T, a High space is 9T and low could be 4T or 5T.
The first and last periods does not have to be valid.

F1 91 51 91 41 51 91 91 51 91 51 51 51 91 91 91 91 51 41 91 51 51 51 51 91 91 91 51 51 51 91 51 51 0
X 1 0 1 0 0 1 1 0 1 0 0 0 1 1 1 1 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 0 X
1010 0110
1000 1111
0010 0001
1100 0100

This frame looks like a 4 byte set of data.

detection algorithm:
assuming the smallest frame is 24 bits.
find markers /^.?.?(1.){24}/
collect space values and get a high and a low value.
if they are not close, choose the two surrounding values) 9->89A 5->456

Space-len - Revision history

Arco: Created page with "Space-len is an easy way to transmit data with, for example, on-off-keying wireless. 433A 66 9340 408 F191519141519191519151515191919191514191515151519191915151519151510 Th..."