From 445ae057e09e9ba0aca1c4f72490034a4667f040 Mon Sep 17 00:00:00 2001
From: Kevin Le <vinhdat82@gmail.com>
Date: Sat, 10 Oct 2026 09:04:29 +0700
Subject: [PATCH] Added FEM support for Heltec V4.3 R8

---
 variants/heltec_v4_r8/HeltecV4R8Board.cpp | 18 ++++++++++++++++++
 variants/heltec_v4_r8/HeltecV4R8Board.h   |  3 +++
 variants/heltec_v4_r8/LoRaFEMControl.h    |  1 +
 3 files changed, 22 insertions(+)

diff --git a/variants/heltec_v4_r8/HeltecV4R8Board.cpp b/variants/heltec_v4_r8/HeltecV4R8Board.cpp
index b1db7d786..696562c16 100644
--- a/variants/heltec_v4_r8/HeltecV4R8Board.cpp
+++ b/variants/heltec_v4_r8/HeltecV4R8Board.cpp
@@ -64,3 +64,21 @@ const char* HeltecV4R8Board::getManufacturerName() const {
   return "Heltec V4 R8 OLED";
 #endif
 }
+
+bool HeltecV4R8Board::setLoRaFemLnaEnabled(bool enable) {
+  if (!loRaFEMControl.isLnaCanControl()) {
+    return false;
+  }
+
+  loRaFEMControl.setLNAEnable(enable);
+  loRaFEMControl.setRxModeEnable();
+  return true;
+}
+
+bool HeltecV4R8Board::canControlLoRaFemLna() const {
+  return true;
+}
+
+bool HeltecV4R8Board::isLoRaFemLnaEnabled() const {
+  return loRaFEMControl.isLNAEnabled();
+}
diff --git a/variants/heltec_v4_r8/HeltecV4R8Board.h b/variants/heltec_v4_r8/HeltecV4R8Board.h
index 232390fc4..60d7531de 100644
--- a/variants/heltec_v4_r8/HeltecV4R8Board.h
+++ b/variants/heltec_v4_r8/HeltecV4R8Board.h
@@ -24,6 +24,9 @@ public:
   void onBeforeTransmit(void) override;
   void onAfterTransmit(void) override;
   void shutdownPeripherals() override;
+  bool setLoRaFemLnaEnabled(bool enable) override;
+  bool canControlLoRaFemLna() const override;
+  bool isLoRaFemLnaEnabled() const override;
   uint16_t getBattMilliVolts() override;
   bool setAdcMultiplier(float multiplier) override {
     if (multiplier == 0.0f) {
diff --git a/variants/heltec_v4_r8/LoRaFEMControl.h b/variants/heltec_v4_r8/LoRaFEMControl.h
index 961cfd070..4b74c2e26 100644
--- a/variants/heltec_v4_r8/LoRaFEMControl.h
+++ b/variants/heltec_v4_r8/LoRaFEMControl.h
@@ -17,6 +17,7 @@ public:
   void setLNAEnable(bool enabled);
   bool isLnaCanControl(void) { return true; }
   void setLnaCanControl(bool can_control) { }
+  bool isLNAEnabled(void) const { return lna_enabled; }
   LoRaFEMType getFEMType(void) const { return KCT8103L_PA; }
 
 private: