rtl_wmbus cannot read from rtl_sdr -- how to debug -- or can it use rtl_433 instead ? about rtl-wmbus

[xaelsouth]

Hello.

From Multical 21 I know that the meter works in C1/T1 mode only. So try to receive at 868.95MHz and tell rtl-wmbus by omitting the "-s" parameter in ITS command line only to look for T1/C1 datagrams. That will be less CPU exhaustive and probably achieves a slightly better sensitivity:

rtl_sdr -f 868.95M -s 1600000 - 2>/dev/null | build/rtl_wmbus

To "validate output from rtl-sdr". Well, you will ALWAYS get something, even noise. So there is no way to validate whether your meter's signal is in there.

Also, there is no need or way to feed raw data from rtl_433 to rtl-wmbus. rtl_433 seems to control the RTL dongle by itself, whereas rtl_wmbus relies on rtl_sdr and acts like a filter receiving all its data from rtl_sdr.

[xaelsouth]

... and make sure you have put '-' (a minus) in the command line which means that rtl_sdr will redirect its output to stdout!

[xaelsouth]

I nothing worked until now, please check out with the new version of rtl_wmbus. I'm gonna close this issue.