diff --git a/README.md b/README.md index 1bd3e87..fb31dd1 100644 --- a/README.md +++ b/README.md @@ -54,12 +54,12 @@ To run continuously with rx_sdr (or even with a higher sampling and decimation r * rx_sdr -f 868.95M -s 1600000 - 2>/dev/null | build/rtl_wmbus * rx_sdr -f 868.95M -s 4000000 - 2>/dev/null | build/rtl_wmbus -d 5 -Notice "-d 3" in the last line: it's a multiple of 800kHz resulting from the sample rate of 4000000. +Notice "-d 5" in the last line: it's a multiple of 800kHz resulting from the sample rate of 4000000. To count "good" (no 3 out of 6 errors, no checksum errors) packets: * cat samples.bin | build/rtl_wmbus 2>/dev/null | grep "[T,C,S]1;1;1" | wc -l -Carrier-frequency given at "-f" must be set properly. With my DVB-T-Receiver I had to choose carrier 50kHz under the standard of 868.95MHz. Sample rate at 1.6Ms/s should be used or an a multiple of 800kHz. +Carrier-frequency given at "-f" must be set properly. With my DVB-T-Receiver I had to choose carrier 50kHz under the standard of 868.95MHz. Sample rate at 1.6Ms/s should be used or use a multiple of 800kHz. RTL-SDR supports sampling frequencies up to 3.2MSaples, so you use 1.6MSamples, 2.4MSamples or 3.2Msamples. See samples/samples2.bin for a live example with two T1 mode devices inside. @@ -105,10 +105,10 @@ Notice in the last line * "868.7M": the new frequency to receive at. rtl_wmbus will then shift all frequencies - * by 250kHz to new center frequency at and 868.95Mhz (T1, C1) - * by 400kHz to new center frequency and 868.3Mhz (S1) + * by 250kHz to new center frequency at 868.95Mhz (T1 and C1) + * by 400kHz to new center frequency at 868.3Mhz (S1) -I have tested that so far and can confirm that it works for T1/C1, but can't test for S1 as I have no such meter. +I have tested this so far and can confirm that it works for T1/C1, but can't test for S1 as I have no such meter. License -------