Initial commit: Simple Sensor firmware for Heltec T114 with BME280

- MeshCore-based Simple Sensor firmware
- Heltec T114 without display
- BME280 sensor support (temp/humidity/pressure)
- Radio: 868.856018 MHz, SF7, BW62.5 kHz, CR4/7
- 2-byte path hash
- PlatformIO project

variants/heltec_t096/LoRaFEMControl.cpp

@@ -0,0 +1,51 @@
+#include "LoRaFEMControl.h"
+#include <Arduino.h>
+
+void LoRaFEMControl::init(void)
+{
+    pinMode(P_LORA_PA_POWER, OUTPUT);
+    digitalWrite(P_LORA_PA_POWER, HIGH);
+    delay(1);
+    pinMode(P_LORA_KCT8103L_PA_CSD, OUTPUT);
+    digitalWrite(P_LORA_KCT8103L_PA_CSD, HIGH);
+    pinMode(P_LORA_KCT8103L_PA_CTX, OUTPUT);
+    digitalWrite(P_LORA_KCT8103L_PA_CTX, HIGH);
+    setLnaCanControl(true);
+}
+
+void LoRaFEMControl::setSleepModeEnable(void)
+{
+    // shutdown the PA
+    digitalWrite(P_LORA_KCT8103L_PA_CSD, LOW);
+}
+
+void LoRaFEMControl::setTxModeEnable(void)
+{
+    digitalWrite(P_LORA_KCT8103L_PA_CSD, HIGH);
+    digitalWrite(P_LORA_KCT8103L_PA_CTX, HIGH);
+}
+
+void LoRaFEMControl::setRxModeEnable(void)
+{
+    digitalWrite(P_LORA_KCT8103L_PA_CSD, HIGH);
+    if (lna_enabled) {
+        digitalWrite(P_LORA_KCT8103L_PA_CTX, LOW);
+    } else {
+        digitalWrite(P_LORA_KCT8103L_PA_CTX, HIGH);
+    }
+}
+
+void LoRaFEMControl::setRxModeEnableWhenMCUSleep(void)
+{
+    digitalWrite(P_LORA_KCT8103L_PA_CSD, HIGH);
+    if (lna_enabled) {
+        digitalWrite(P_LORA_KCT8103L_PA_CTX, LOW);
+    } else {
+        digitalWrite(P_LORA_KCT8103L_PA_CTX, HIGH);
+    }
+}
+
+void LoRaFEMControl::setLNAEnable(bool enabled)
+{
+    lna_enabled = enabled;
+}