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Enable LNA by default for Heltec v4.3 (#9906)

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It should only be disabled by users that have problems with it.
This commit is contained in:
Wessel
2026-03-19 14:11:10 +01:00
committed by Ben Meadors
parent e4c5bfd161
commit 532a63e541
5 changed files with 6 additions and 6 deletions
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4
src/mesh/LoRaFEMInterface.cpp
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@@ -25,7 +25,7 @@ void LoRaFEMInterface::init(void)
pinMode(LORA_KCT8103L_PA_CSD, OUTPUT);
digitalWrite(LORA_KCT8103L_PA_CSD, HIGH);
pinMode(LORA_KCT8103L_PA_CTX, OUTPUT);
digitalWrite(LORA_KCT8103L_PA_CTX, HIGH);
digitalWrite(LORA_KCT8103L_PA_CTX, LOW); // LNA enabled by default
setLnaCanControl(true);
} else if (digitalRead(LORA_KCT8103L_PA_CSD) == LOW) {
// FEM is GC1109
@@ -66,7 +66,7 @@ void LoRaFEMInterface::init(void)
pinMode(LORA_KCT8103L_PA_CSD, OUTPUT);
digitalWrite(LORA_KCT8103L_PA_CSD, HIGH);
pinMode(LORA_KCT8103L_PA_CTX, OUTPUT);
digitalWrite(LORA_KCT8103L_PA_CTX, HIGH);
digitalWrite(LORA_KCT8103L_PA_CTX, LOW); // LNA enabled by default
setLnaCanControl(true);
#endif
}

2
src/mesh/LoRaFEMInterface.h
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@@ -22,7 +22,7 @@ class LoRaFEMInterface
private:
LoRaFEMType fem_type;
bool lna_enabled = false;
bool lna_enabled = true;
bool lna_can_control = false;
};
extern LoRaFEMInterface loraFEMInterface;

2
src/mesh/NodeDB.cpp
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@@ -569,7 +569,7 @@ void NodeDB::installDefaultConfig(bool preserveKey = false)
config.lora.override_duty_cycle = false;
config.lora.config_ok_to_mqtt = false;
#if HAS_LORA_FEM
config.lora.fem_lna_mode = meshtastic_Config_LoRaConfig_FEM_LNA_Mode_DISABLED;
config.lora.fem_lna_mode = meshtastic_Config_LoRaConfig_FEM_LNA_Mode_ENABLED;
#else
config.lora.fem_lna_mode = meshtastic_Config_LoRaConfig_FEM_LNA_Mode_NOT_PRESENT;
#endif

2
src/mesh/SX126xInterface.cpp
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@@ -60,7 +60,7 @@ template <typename T> bool SX126xInterface<T>::init()
loraFEMInterface.init();
// Apply saved FEM LNA mode from config
if (loraFEMInterface.isLnaCanControl()) {
loraFEMInterface.setLNAEnable(config.lora.fem_lna_mode == meshtastic_Config_LoRaConfig_FEM_LNA_Mode_ENABLED);
loraFEMInterface.setLNAEnable(config.lora.fem_lna_mode != meshtastic_Config_LoRaConfig_FEM_LNA_Mode_DISABLED);
}
#endif

2
src/modules/AdminModule.cpp
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@@ -800,7 +800,7 @@ void AdminModule::handleSetConfig(const meshtastic_Config &c)
#if HAS_LORA_FEM
// Apply FEM LNA mode from config (only meaningful on hardware that supports it)
if (loraFEMInterface.isLnaCanControl()) {
loraFEMInterface.setLNAEnable(config.lora.fem_lna_mode == meshtastic_Config_LoRaConfig_FEM_LNA_Mode_ENABLED);
loraFEMInterface.setLNAEnable(config.lora.fem_lna_mode != meshtastic_Config_LoRaConfig_FEM_LNA_Mode_DISABLED);
} else if (config.lora.fem_lna_mode != meshtastic_Config_LoRaConfig_FEM_LNA_Mode_NOT_PRESENT) {
// Hardware FEM does not support LNA control; normalize stored config to match actual capability
LOG_WARN("FEM LNA mode configured but current FEM does not support LNA control; normalizing to NOT_PRESENT");