From d9e67222f59391a4352bd406ed21bed69ae0dc22 Mon Sep 17 00:00:00 2001 From: Wessel Nieboer Date: Wed, 25 Feb 2026 09:11:23 +0100 Subject: [PATCH 1/4] prefs is 5 char length :nerd: --- src/helpers/CommonCLI.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/helpers/CommonCLI.cpp b/src/helpers/CommonCLI.cpp index e20bbb1c0..fd6312734 100644 --- a/src/helpers/CommonCLI.cpp +++ b/src/helpers/CommonCLI.cpp @@ -749,7 +749,7 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch _prefs->advert_loc_policy = ADVERT_LOC_SHARE; savePrefs(); strcpy(reply, "ok"); - } else if (memcmp(command+11, "prefs", 4) == 0) { + } else if (memcmp(command+11, "prefs", 5) == 0) { _prefs->advert_loc_policy = ADVERT_LOC_PREFS; savePrefs(); strcpy(reply, "ok"); From f7ace74014920186927452f7494126d1ae87ecb0 Mon Sep 17 00:00:00 2001 From: Wessel Nieboer Date: Wed, 18 Feb 2026 01:16:52 +0100 Subject: [PATCH 2/4] Use hardware channel activity detection for checking interference --- examples/companion_radio/MyMesh.cpp | 2 +- examples/simple_repeater/MyMesh.cpp | 2 +- examples/simple_room_server/MyMesh.cpp | 2 +- examples/simple_sensor/SensorMesh.cpp | 2 +- src/helpers/radiolib/RadioLibWrappers.cpp | 13 ++++++++++--- src/helpers/radiolib/RadioLibWrappers.h | 3 ++- 6 files changed, 16 insertions(+), 8 deletions(-) diff --git a/examples/companion_radio/MyMesh.cpp b/examples/companion_radio/MyMesh.cpp index 1f71a9bc6..2c42a22b3 100644 --- a/examples/companion_radio/MyMesh.cpp +++ b/examples/companion_radio/MyMesh.cpp @@ -250,7 +250,7 @@ float MyMesh::getAirtimeBudgetFactor() const { } int MyMesh::getInterferenceThreshold() const { - return 0; // disabled for now, until currentRSSI() problem is resolved + return 1; // non-zero enables hardware CAD (Channel Activity Detection) before TX } int MyMesh::calcRxDelay(float score, uint32_t air_time) const { diff --git a/examples/simple_repeater/MyMesh.cpp b/examples/simple_repeater/MyMesh.cpp index 81c1dcb42..609d00e20 100644 --- a/examples/simple_repeater/MyMesh.cpp +++ b/examples/simple_repeater/MyMesh.cpp @@ -840,7 +840,7 @@ MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondCloc _prefs.advert_interval = 1; // default to 2 minutes for NEW installs _prefs.flood_advert_interval = 12; // 12 hours _prefs.flood_max = 64; - _prefs.interference_threshold = 0; // disabled + _prefs.interference_threshold = 1; // non-zero enables hardware CAD before TX // bridge defaults _prefs.bridge_enabled = 1; // enabled diff --git a/examples/simple_room_server/MyMesh.cpp b/examples/simple_room_server/MyMesh.cpp index 5451505a2..cfd5344ff 100644 --- a/examples/simple_room_server/MyMesh.cpp +++ b/examples/simple_room_server/MyMesh.cpp @@ -616,7 +616,7 @@ MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondCloc _prefs.advert_interval = 1; // default to 2 minutes for NEW installs _prefs.flood_advert_interval = 12; // 12 hours _prefs.flood_max = 64; - _prefs.interference_threshold = 0; // disabled + _prefs.interference_threshold = 1; // non-zero enables hardware CAD before TX #ifdef ROOM_PASSWORD StrHelper::strncpy(_prefs.guest_password, ROOM_PASSWORD, sizeof(_prefs.guest_password)); #endif diff --git a/examples/simple_sensor/SensorMesh.cpp b/examples/simple_sensor/SensorMesh.cpp index 68fea474e..7758beadb 100644 --- a/examples/simple_sensor/SensorMesh.cpp +++ b/examples/simple_sensor/SensorMesh.cpp @@ -723,7 +723,7 @@ SensorMesh::SensorMesh(mesh::MainBoard& board, mesh::Radio& radio, mesh::Millise _prefs.flood_advert_interval = 0; // disabled _prefs.disable_fwd = true; _prefs.flood_max = 64; - _prefs.interference_threshold = 0; // disabled + _prefs.interference_threshold = 1; // non-zero enables hardware CAD before TX // GPS defaults _prefs.gps_enabled = 0; diff --git a/src/helpers/radiolib/RadioLibWrappers.cpp b/src/helpers/radiolib/RadioLibWrappers.cpp index 2216ca8f3..873cd47fa 100644 --- a/src/helpers/radiolib/RadioLibWrappers.cpp +++ b/src/helpers/radiolib/RadioLibWrappers.cpp @@ -168,10 +168,17 @@ void RadioLibWrapper::onSendFinished() { state = STATE_IDLE; } +int16_t RadioLibWrapper::performChannelScan() { + return _radio->scanChannel(); +} + bool RadioLibWrapper::isChannelActive() { - return _threshold == 0 - ? false // interference check is disabled - : getCurrentRSSI() > _noise_floor + _threshold; + if (_threshold == 0) return false; // interference check is disabled + + int16_t result = performChannelScan(); + // scanChannel() leaves radio in standby — restart RX regardless of result + startRecv(); + return (result == RADIOLIB_LORA_DETECTED); } float RadioLibWrapper::getLastRSSI() const { diff --git a/src/helpers/radiolib/RadioLibWrappers.h b/src/helpers/radiolib/RadioLibWrappers.h index b338b03a4..eb32d33eb 100644 --- a/src/helpers/radiolib/RadioLibWrappers.h +++ b/src/helpers/radiolib/RadioLibWrappers.h @@ -31,13 +31,14 @@ class RadioLibWrapper : public mesh::Radio { bool isInRecvMode() const override; bool isChannelActive(); - bool isReceiving() override { + bool isReceiving() override { if (isReceivingPacket()) return true; return isChannelActive(); } virtual float getCurrentRSSI() =0; + virtual int16_t performChannelScan(); int getNoiseFloor() const override { return _noise_floor; } void triggerNoiseFloorCalibrate(int threshold) override; From 948da351172699102585c81e4031ae9578011553 Mon Sep 17 00:00:00 2001 From: Wessel Nieboer Date: Sun, 22 Feb 2026 16:05:18 +0100 Subject: [PATCH 3/4] Also return busy if preamble detected --- src/helpers/radiolib/RadioLibWrappers.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/helpers/radiolib/RadioLibWrappers.cpp b/src/helpers/radiolib/RadioLibWrappers.cpp index 873cd47fa..bf36970fa 100644 --- a/src/helpers/radiolib/RadioLibWrappers.cpp +++ b/src/helpers/radiolib/RadioLibWrappers.cpp @@ -178,7 +178,7 @@ bool RadioLibWrapper::isChannelActive() { int16_t result = performChannelScan(); // scanChannel() leaves radio in standby — restart RX regardless of result startRecv(); - return (result == RADIOLIB_LORA_DETECTED); + return (result == RADIOLIB_LORA_DETECTED || result == RADIOLIB_PREAMBLE_DETECTED); } float RadioLibWrapper::getLastRSSI() const { From 8bd55b663619f7225b409a9b3abc92c1f21c8517 Mon Sep 17 00:00:00 2001 From: Wessel Nieboer Date: Sun, 22 Feb 2026 16:08:04 +0100 Subject: [PATCH 4/4] Just check for not channel free --- src/helpers/radiolib/RadioLibWrappers.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/helpers/radiolib/RadioLibWrappers.cpp b/src/helpers/radiolib/RadioLibWrappers.cpp index bf36970fa..61944d30f 100644 --- a/src/helpers/radiolib/RadioLibWrappers.cpp +++ b/src/helpers/radiolib/RadioLibWrappers.cpp @@ -178,7 +178,7 @@ bool RadioLibWrapper::isChannelActive() { int16_t result = performChannelScan(); // scanChannel() leaves radio in standby — restart RX regardless of result startRecv(); - return (result == RADIOLIB_LORA_DETECTED || result == RADIOLIB_PREAMBLE_DETECTED); + return result != RADIOLIB_CHANNEL_FREE; } float RadioLibWrapper::getLastRSSI() const {