Comments (4)
Hello alalons,
few years were gone very quick ;), checkout and test it:
rtl_sdr -f 868.7M -s 1600000 - 2>/dev/null | build/rtl_wmbus -s
Notice here
- 868.7M - the new rx frequency in between of 868.3M (S1) and 868.95M (T1/C1)
- "-s" switch which informs rtl_wmbus that frequency shifting is needed
Please test and let me know if it works. I have tested for T/C1 only. Could you record a signal where both S1/C1/T1 are included?
rtl_sdr s1_T1_c1_samples.bin -f 868.7M -s 1600000
from rtl-wmbus.
Yes, basically this should be possible, if you would sample with a higher sample rate (2.4 MSamples instead of 1.6Msamples) and center to 868.3MHz. Then you process S1 in the same way with only the decimation rate pulled up to 3 (2.4MSamples) instead of 2 (1.6Msamples). But in case of T1/C1 a frequency translation must be applied, which could be done by something like FIR xlating and decimation filter (as implemented in the GnuRadio).
If I had time (in a few years or so) iI want to implement it. Or send a patch if you wanna get it earlier :-P.
from rtl-wmbus.
from rtl-wmbus.
Thanks for testing and sharing the samples!
from rtl-wmbus.
Related Issues (20)
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- Package in Debian? HOT 7
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- Please tag releases
- Resource requirements of rtl-wmbus
- Test with IZAR RC 434 I R4 HOT 3
- Honeywell V210 Water Meter 868MHz T1 HOT 8
- Why don't fork on dual mode (S1 and T1/C1 datagrams simultaneously) HOT 5
- RSSI value in dBm HOT 2
- Wrong behaviour on stadout HOT 2
- rtl_wmbus cannot read from rtl_sdr -- how to debug -- or can it use rtl_433 instead ? HOT 3
- Wmbus device , using different frequency and different transmission speed HOT 1
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from rtl-wmbus.