* new target: RAK_4631_Repeater

src/helpers/IdentityStore.cpp

@@ -17,7 +17,13 @@ bool IdentityStore::load(const char *name, mesh::LocalIdentity& id) {
 bool IdentityStore::save(const char *name, const mesh::LocalIdentity& id) {
   char filename[40];
   sprintf(filename, "%s/%s.id", _dir, name);
+
+#if defined(NRF52_PLATFORM)
+  File file = _fs->open(filename, FILE_O_WRITE);
+  if (file) { file.seek(0); file.truncate(); }
+#else
   File file = _fs->open(filename, "w", true);
+#endif
   if (file) {
     id.writeTo(file);
     file.close();

src/helpers/IdentityStore.h

@@ -1,13 +1,22 @@
 #pragma once
 
-#include <FS.h>
+#if defined(ESP32)
+  #include <FS.h>
+  #define FILESYSTEM  fs::FS
+#elif defined(NRF52_PLATFORM)
+  #include <Adafruit_LittleFS.h>
+  #define FILESYSTEM  Adafruit_LittleFS
+
+  using namespace Adafruit_LittleFS_Namespace;
+#endif
+
 #include <Identity.h>
 
 class IdentityStore {
-  fs::FS* _fs;
+  FILESYSTEM* _fs;
   const char* _dir;
 public:
-  IdentityStore(fs::FS& fs, const char* dir): _fs(&fs), _dir(dir) { }
+  IdentityStore(FILESYSTEM& fs, const char* dir): _fs(&fs), _dir(dir) { }
 
   void begin() { _fs->mkdir(_dir); }
   bool load(const char *name, mesh::LocalIdentity& id);

src/helpers/RAK4631Board.h

@@ -0,0 +1,63 @@
+#pragma once
+
+#include <MeshCore.h>
+#include <Arduino.h>
+
+#if defined(NRF52_PLATFORM)
+
+// LoRa radio module pins for RAK4631
+#define  P_LORA_DIO_1   47
+#define  P_LORA_NSS     42
+#define  P_LORA_RESET  RADIOLIB_NC   // 38
+#define  P_LORA_BUSY    46
+#define  P_LORA_SCLK    43
+#define  P_LORA_MISO    45
+#define  P_LORA_MOSI    44
+#define  SX126X_POWER_EN  37
+ 
+#define SX126X_DIO2_AS_RF_SWITCH  true
+#define SX126X_DIO3_TCXO_VOLTAGE   1.8
+
+// built-ins
+#define  PIN_VBAT_READ    1
+#define  ADC_MULTIPLIER   6.17
+
+class RAK4631Board : public mesh::MainBoard {
+protected:
+  uint8_t startup_reason;
+
+public:
+  void begin() {
+    // for future use, sub-classes SHOULD call this from their begin()
+    startup_reason = BD_STARTUP_NORMAL;
+
+    pinMode(SX126X_POWER_EN, OUTPUT);
+    digitalWrite(SX126X_POWER_EN, HIGH);
+  }
+
+  uint8_t getStartupReason() const override { return startup_reason; }
+
+  #define BATTERY_SAMPLES 10
+
+  uint16_t getBattMilliVolts() override {
+    analogReadResolution(12);
+
+    uint32_t raw = 0;
+    for (int i = 0; i < BATTERY_SAMPLES; i++) {
+      raw += analogRead(PIN_VBAT_READ);
+    }
+    raw = raw / BATTERY_SAMPLES;
+
+    return (ADC_MULTIPLIER * raw) / 4096;
+  }
+
+  const char* getManufacturerName() const override {
+    return "RAK 4631";
+  }
+
+  void reboot() override {
+    NVIC_SystemReset();
+  }
+};
+
+#endif