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Diffstat (limited to 'util_tx_test/readme.md')
| -rw-r--r-- | util_tx_test/readme.md | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/util_tx_test/readme.md b/util_tx_test/readme.md index 5450f18..9fb7b22 100644 --- a/util_tx_test/readme.md +++ b/util_tx_test/readme.md @@ -41,30 +41,38 @@ Press Ctrl+C to stop the application before that. Use the -f option followed by a real number (decimal point and scientific 'E notation' are OK) to specify the modulation central frequency. +Use the -b option to set LoRa modulation bandwidth in kHz (accepted values: 125, +250 or 500). + Use the -s option to specify the Spreading Factor of LoRa modulation (values 7 to 12 are valid). -Use the -b option to set LoRa modulation bandwidth in kHz (accepted values: 125, -250 or 500). +Use the -c option to specify the Coding Rate of LoRa modulation ( 1 = 4/5, 2 = +4/6, 3 = 4/7, 4 = 4/8 ). Use the -p option to set the concentrator TX power in dBm. Not all values are supported by hardware (typically 14 et 20 dBm are supported, other values might not give expected power). Check with a RF power meter before connecting any sensitive equipment. +Use the -r option to set LoRa preamble size. A minimum preamble length of 6 +symbols is enforced. + +Use the -z option to set the payload size in bytes. + Use the -t option to specify the number of milliseconds of pause between packets. Using zero will result in a quasi-continuous emission. -Use the -x option to specify how many packets should be sent. +Use the -x option to specify how many packets should be sent. The value -1 cause +the program to send packet indefinitely, until stopped (using Ctrl-C). Use the -i option to invert the LoRa modulation polarity. -The packets are 20 bytes long, and protected by the smallest supported ECC. - The payload content is: [T][E][S][T][packet counter MSB][packet counter LSB] followed by ASCII padding. -All LoRa data is whitened, so the padding has no influence whatsoever on the -packet error rate. + +All LoRa data is scrambled and whitened, so the padding has no influence +whatsoever on the packet error rate. 4. License ----------- |