From ed48819ae8b0f697f7a69ab8f561413e15245360 Mon Sep 17 00:00:00 2001
From: sh123 <sh123@users.noreply.github.com>
Date: Thu, 25 Apr 2019 09:17:02 +0300
Subject: [PATCH] Added arduino sketch and loraprs modules

---
 esp32_loraprs.ino |  39 ++++++++++++++
 loraprs.cpp       | 126 ++++++++++++++++++++++++++++++++++++++++++++++
 loraprs.h         |  54 ++++++++++++++++++++
 3 files changed, 219 insertions(+)
 create mode 100644 esp32_loraprs.ino
 create mode 100644 loraprs.cpp
 create mode 100644 loraprs.h

diff --git a/esp32_loraprs.ino b/esp32_loraprs.ino
new file mode 100644
index 0000000..6d52dad
--- /dev/null
+++ b/esp32_loraprs.ino
@@ -0,0 +1,39 @@
+#include "WiFi.h"
+#include "loraprs.h"
+
+#define LORAPRS_CLIENT
+
+#define LORAPRS_FREQ        432.5E6
+
+#ifdef LORAPRS_CLIENT
+#define LORAPRS_BT_NAME     "loraprs_client"
+#define LORAPRS_WIFI_SSID   ""
+#define LORAPRS_WIFI_KEY    ""
+#define LORAPRS_LOGIN       "NOCALL-0"
+#define LORAPRS_PASS        "00000"
+#else
+#define LORAPRS_BT_NAME     "loraprs_server"
+#define LORAPRS_WIFI_SSID   "<mywifi>"
+#define LORAPRS_WIFI_KEY    "<key>"
+#define LORAPRS_LOGIN       "NOCALL-0"
+#define LORAPRS_PASS        "00000"
+#endif 
+
+LoraPrs loraPrs(
+  LORAPRS_FREQ, 
+  LORAPRS_BT_NAME, 
+  LORAPRS_WIFI_SSID, 
+  LORAPRS_WIFI_KEY,
+  LORAPRS_LOGIN,
+  LORAPRS_PASS);
+
+void setup() {
+  Serial.begin(115200);
+  while (!Serial);
+
+  loraPrs.setup();
+}
+
+void loop() {
+  loraPrs.loop();
+}
diff --git a/loraprs.cpp b/loraprs.cpp
new file mode 100644
index 0000000..d071726
--- /dev/null
+++ b/loraprs.cpp
@@ -0,0 +1,126 @@
+#include "loraprs.h"
+
+LoraPrs::LoraPrs(int loraFreq, String btName, String wifiName, 
+  String wifiKey, String aprsLoginCallsign, String aprsPass) 
+  : serialBt_()
+  , loraFreq_(loraFreq)
+  , btName_(btName)
+  , wifiName_(wifiName)
+  , wifiKey_(wifiKey)
+{ 
+    aprsLogin_ = "";
+    aprsLogin_ += "user ";
+    aprsLogin_ += aprsLoginCallsign;
+    aprsLogin_ += " pass ";
+    aprsLogin_ += aprsPass;
+    aprsLogin_ += " vers ";
+    aprsLogin_ += CfgLoraprsVersion;
+    aprsLogin_ += "\n";
+}
+
+void LoraPrs::setup()
+{
+  setupWifi(wifiName_, wifiKey_);
+  setupLora(loraFreq_);
+  setupBt(btName_);
+}
+
+void LoraPrs::setupWifi(String wifiName, String wifiKey) 
+{
+  if (wifiName.length() != 0) {    
+    Serial.print("WIFI connecting to " + wifiName);
+
+    WiFi.begin(wifiName.c_str(), wifiKey.c_str());
+
+    // TODO, add timeout
+    while (WiFi.status() != WL_CONNECTED) {
+      delay(500);
+      Serial.print(".");
+    }
+    Serial.println("ok");
+    Serial.println(WiFi.localIP());
+  }
+}
+
+void LoraPrs::setupLora(int loraFreq)
+{
+  Serial.print("LoRa init...");
+  
+  LoRa.setPins(CfgPinSs, CfgPinRst, CfgPinDio0);
+  
+  while (!LoRa.begin(loraFreq)) {
+    Serial.print(".");
+    delay(500);
+  }
+  LoRa.setSyncWord(CfgSync);
+  LoRa.setSpreadingFactor(CfgSpread);
+  LoRa.setSignalBandwidth(CfgBw);
+  LoRa.setTxPower(CfgPower);
+  
+  Serial.println("ok");  
+}
+
+void LoraPrs::setupBt(String btName) 
+{
+  Serial.print("BT init " + btName + "...");
+  
+  if (serialBt_.begin(btName)) {
+    Serial.println("ok");
+  }
+  else
+  {
+    Serial.println("failed");
+  }
+}
+
+void LoraPrs::loop()
+{
+  if (serialBt_.available()) {
+    onBtReceived();
+  }
+  if (LoRa.parsePacket()) {
+    onLoraReceived();
+  }
+}
+
+void LoraPrs::onAprsReceived(String aprsMessage)
+{
+  Serial.print(aprsMessage);
+
+  if (WiFi.status() == WL_CONNECTED) {
+    WiFiClient wifiClient;
+
+    if (!wifiClient.connect(CfgAprsHost.c_str(), CfgAprsPort)) {
+      Serial.println("Failed to connect to " + CfgAprsHost + ":" + CfgAprsPort);
+      return;
+    }
+    wifiClient.print(aprsLogin_);
+    wifiClient.print(aprsMessage);
+    wifiClient.stop();
+  }
+}
+
+void LoraPrs::onLoraReceived()
+{
+  String buf;
+  while (LoRa.available()) {
+    char c = (char)LoRa.read();
+    if (c != '\n')
+      buf += c;
+  }
+  for (int i; i < buf.length(); i++) {
+    serialBt_.write((uint8_t)buf[i]);
+  }
+  onAprsReceived(buf + " " + String(LoRa.packetSnr()) + "dB\n");
+  delay(50);
+}
+
+void LoraPrs::onBtReceived() 
+{
+  LoRa.beginPacket();
+  while (serialBt_.available()) {
+    char c = (char)serialBt_.read();
+    LoRa.print(c);
+  }
+  LoRa.endPacket();
+}
diff --git a/loraprs.h b/loraprs.h
new file mode 100644
index 0000000..e878c4a
--- /dev/null
+++ b/loraprs.h
@@ -0,0 +1,54 @@
+#ifndef LORAPRS_H
+#define LORAPRS_H
+
+#include <Arduino.h>
+#include <SPI.h>
+#include <LoRa.h>
+#include <WiFi.h>
+
+#include "BluetoothSerial.h"
+
+class LoraPrs
+{
+public:
+  const String CfgLoraprsVersion = "LoRAPRS 0.1";
+  
+  const byte CfgPinSs = 5;
+  const byte CfgPinRst = 26;
+  const byte CfgPinDio0 = 14;
+
+  const int CfgBw = 20e3;
+  const byte CfgSpread = 9;
+  const byte CfgSync = 0xf3;
+  const byte CfgPower = 20;
+
+  const int CfgAprsPort = 14580;
+  const String CfgAprsHost = "rotate.aprs2.net";
+
+public:
+  LoraPrs(int freq, String btName, String wifiName, 
+    String wifiKey, String aprsLoginCallsign, String aprsPass);
+  
+  void setup();
+  void loop();
+
+private:
+  void setupWifi(String wifiName, String wifiKey);
+  void setupLora(int loraFreq);
+  void setupBt(String btName);
+  
+  void onLoraReceived();
+  void onBtReceived();
+  void onAprsReceived(String aprsMessage);
+  
+private:
+  BluetoothSerial serialBt_;
+  
+  int loraFreq_;
+  String btName_;
+  String wifiName_;
+  String wifiKey_;
+  String aprsLogin_;
+};
+
+#endif // LORAPRS_H