* new target: RAK_4631_Repeater

examples/simple_repeater/main.cpp

@@ -1,6 +1,11 @@
 #include <Arduino.h>   // needed for PlatformIO
 #include <Mesh.h>
-#include <SPIFFS.h>
+
+#if defined(NRF52_PLATFORM)
+  #include <InternalFileSystem.h>
+#elif defined(ESP32)
+  #include <SPIFFS.h>
+#endif
 
 #define RADIOLIB_STATIC_ONLY 1
 #include <RadioLib.h>
@@ -54,6 +59,10 @@
   #include <helpers/ESP32Board.h>
   #include <helpers/CustomSX1262Wrapper.h>
   static ESP32Board board;
+#elif defined(RAK_4631)
+  #include <helpers/RAK4631Board.h>
+  #include <helpers/CustomSX1262Wrapper.h>
+  static RAK4631Board board;
 #else
   #error "need to provide a 'board' object"
 #endif
@@ -351,7 +360,9 @@ public:
   }
 };
 
-#if defined(P_LORA_SCLK)
+#if defined(NRF52_PLATFORM)
+RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, SPI);
+#elif defined(P_LORA_SCLK)
 SPIClass spi;
 RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, spi);
 #else
@@ -379,12 +390,13 @@ void setup() {
   float tcxo = 1.6f;
 #endif
 
-#if defined(P_LORA_SCLK)
+#if defined(NRF52_PLATFORM)
+  SPI.setPins(P_LORA_MISO, P_LORA_SCLK, P_LORA_MOSI);
+  SPI.begin();
+#elif defined(P_LORA_SCLK)
   spi.begin(P_LORA_SCLK, P_LORA_MISO, P_LORA_MOSI);
-  int status = radio.begin(LORA_FREQ, LORA_BW, LORA_SF, LORA_CR, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 8, tcxo);
-#else
-  int status = radio.begin(LORA_FREQ, LORA_BW, LORA_SF, LORA_CR, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 8, tcxo);
 #endif
+  int status = radio.begin(LORA_FREQ, LORA_BW, LORA_SF, LORA_CR, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 8, tcxo);
   if (status != RADIOLIB_ERR_NONE) {
     delay(5000);
     Serial.print("ERROR: radio init failed: ");
@@ -402,8 +414,15 @@ void setup() {
   radio.setDio2AsRfSwitch(SX126X_DIO2_AS_RF_SWITCH);
 #endif
 
+#if defined(NRF52_PLATFORM)
+  InternalFS.begin();
+  IdentityStore store(InternalFS, "/identity");
+#elif defined(ESP32)
   SPIFFS.begin(true);
   IdentityStore store(SPIFFS, "/identity");
+#else
+  #error "need to define filesystem"
+#endif
   if (!store.load("_main", the_mesh.self_id)) {
     the_mesh.self_id = mesh::LocalIdentity(the_mesh.getRNG());  // create new random identity
     store.save("_main", the_mesh.self_id);

platformio.ini

@@ -175,3 +175,40 @@ build_flags =
   -D ADMIN_PASSWORD="\"password\""
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1
+
+; ----------------- NRF52 ---------------------
+[nrf52_base]
+extends = arduino_base
+platform = nordicnrf52
+build_flags = ${arduino_base.build_flags}
+  -D NRF52_PLATFORM
+
+[nrf52840_base]
+extends = nrf52_base
+build_flags = ${nrf52_base.build_flags} 
+lib_deps =
+  ${nrf52_base.lib_deps}
+  rweather/Crypto @ ^0.4.0
+  https://github.com/adafruit/Adafruit_nRF52_Arduino
+
+[rak4631]
+extends = nrf52840_base
+board = wiscore_rak4631
+board_check = true
+build_flags = ${nrf52840_base.build_flags}
+  -D RAK_4631
+
+[env:RAK_4631_Repeater]
+extends = rak4631
+build_src_filter = ${rak4631.build_src_filter} +<../examples/simple_repeater/main.cpp>
+build_flags =
+  ${rak4631.build_flags} 
+  -D RADIO_CLASS=CustomSX1262
+  -D WRAPPER_CLASS=CustomSX1262Wrapper
+  -D LORA_TX_POWER=22
+  -D ADVERT_NAME="\"RAK4631 Repeater\""
+  -D ADVERT_LAT=-37.0
+  -D ADVERT_LON=145.0
+  -D ADMIN_PASSWORD="\"password\""
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1

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