It appears I do something wrong:
"lbt_cfg": {
"enable": true,
"rssi_target": -80,
"chan_cfg": [
{"freq_hz":867100000, "scan_time_us":5000},
{"freq_hz":867300000, "scan_time_us":5000},
{"freq_hz":867500000, "scan_time_us":5000},
{"freq_hz":867700000, "scan_time_us":5000},
{"freq_hz":867900000, "scan_time_us":5000},
{"freq_hz":868100000, "scan_time_us":5000},
{"freq_hz":868300000, "scan_time_us":5000},
{"freq_hz":868500000, "scan_time_us":5000}
],
"sx127x_rssi_offset":-165
},
When LBT is activated packet_forwarder shows an error “Failed to start the concentrator”. If I turn off LBT packet forwarder works fine.
INFO: Auto-quit after 300 non-acknowledged PULL_DATA
INFO: FPGA supported features: [TX filter] [Spectral Scan] [LBT]
ERROR: [main] failed to start the concentrator
Test works fine
Followed this page: http://www.multitech.net/developer/software/lora/listen-before-talk/