Add Second Keyset, Save Settings in EEPROM

src/config.example.h

@@ -1,6 +1,13 @@
 //*******************************************************************
 // LoRa Config - Put Your Keys Here! MSB Left for all three
 //*******************************************************************
-unsigned char NwkSkey[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
-unsigned char AppSkey[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+// Primary Keyset, will be used on Startup
-unsigned char DevAddr[4]  = { 0x00, 0x00, 0x00, 0x00 };
+unsigned char NwkSkey_1[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+unsigned char AppSkey_1[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+unsigned char DevAddr_1[4]  = { 0x00, 0x00, 0x00, 0x00 };
+
+// Secondary ABP Keyset, can be selected via Setup
+unsigned char NwkSkey_2[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+unsigned char AppSkey_2[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+unsigned char DevAddr_2[4]  = { 0x00, 0x00, 0x00, 0x00 };

src/main.cpp

@@ -3,6 +3,7 @@
 #include <avr/interrupt.h>
 #include <SPI.h>
 #include <Wire.h>
+#include <EEPROM.h>
 #include <LoRaWAN.h>
 
 // OLED
@@ -26,8 +27,20 @@ enum Modes {
   M_SETUP
 };
 
+enum Settings {
+  S_NONE,
+  S_INTERVAL,
+  S_KEYSET,
+  S_EXIT
+};
+
 Modes amode = M_NORMAL; // Active Mode
 Modes omode = M_NORMAL; // Previous Mode
+Settings cset = S_INTERVAL; // Current Setting
+Settings aset = S_NONE; // Selected Setting
+
+#define EEPROM_KEYSET_ADR 0
+#define EEPROM_INTERVAL_ADR 1
 
 // LoRa
 #include "config.h" // Contains LoRa ABP Keys
@@ -35,11 +48,12 @@ Modes omode = M_NORMAL; // Previous Mode
 #define NSS  PIN_PA5
 RFM95 rfm(DIO0, NSS);
 LoRaWAN lora = LoRaWAN(rfm);
-uint16_t Frame_Counter_Tx = 0x0000;
+uint16_t Frame_Counter_Tx = 0x0001;
 
 // Some Status Variables
 uint8_t interval = 20; // Sending Interval in Settings
 uint8_t packets  = 0;  // Sent LoRa Packets
+uint8_t keyset   = 1;  // LoRa KeySet
 String statusmsg = "";
 
 uint8_t loraBuffer[9]; //  Lora Data Packet
@@ -60,14 +74,40 @@ uint16_t readSupplyVoltage() {
   return reading;
 }
 
+void loraKeySetup(uint8_t keyset) {
+  if (keyset == 1)
+    lora.setKeys(NwkSkey_1, AppSkey_1, DevAddr_1);
+  if (keyset == 2)
+    lora.setKeys(NwkSkey_2, AppSkey_2, DevAddr_2);
+}
+
 // Button Handler Function
 void handler(Button2& btn) {
   switch (btn.getClickType()) {
     case SINGLE_CLICK:
       if (amode == M_SETUP) {
-        interval = interval += 10;
+        if (aset == S_INTERVAL) {
-        if (interval > 40)
+          interval = interval += 10;
-          interval = 10;
+          if (interval > 30)
+            interval = 10;
+        } else if (aset == S_KEYSET) {
+          keyset = keyset + 1;
+          if  (keyset > 2)
+            keyset = 1;
+          loraKeySetup(keyset);
+        } else {
+          switch (cset) {
+            case S_INTERVAL:
+              cset = S_KEYSET;
+              break;
+            case S_KEYSET:
+              cset = S_EXIT;
+              break;
+            case S_EXIT:
+              cset = S_INTERVAL;
+              break;
+          }
+        }
       } else if (amode == M_NORMAL) {
         statusmsg = "Adhoc Request";
         adhocsend = true;
@@ -77,9 +117,19 @@ void handler(Button2& btn) {
       switch (amode) {
         case M_NORMAL:
           amode = M_SETUP;
+          cset = S_INTERVAL;
           break;
         case M_SETUP:
-          amode = M_NORMAL;
+          if (cset == S_EXIT) {
+            aset = S_NONE;
+            amode = M_NORMAL;
+            EEPROM.update(EEPROM_KEYSET_ADR, keyset);
+            EEPROM.update(EEPROM_INTERVAL_ADR, interval);
+          } else if (aset == S_NONE) {
+            aset = cset;
+          } else {
+            aset = S_NONE;
+          }
           break;
       }
       break;
@@ -102,8 +152,25 @@ void updateDisplay() {
   if (amode == M_SETUP) {
     oled.println ("<< SETUP >>");
     oled.println ("");
+    char tmp = ' ';
+
+    tmp = (cset == S_INTERVAL) ? '>' : ' ';
+    oled.print(tmp);
+    tmp = (aset == S_INTERVAL) ? '>' : ' ';
+    oled.print(tmp);
     oled.print("Interval: ");
     oled.println(interval);
+    
+    tmp = (cset == S_KEYSET) ? '>' : ' ';
+    oled.print(tmp);
+    tmp = (aset == S_KEYSET) ? '>' : ' ';
+    oled.print(tmp);
+    oled.print("ABP KeySet: ");
+    oled.println(keyset);
+    tmp = (cset == S_EXIT) ? '>' : ' ';
+    oled.print(tmp);
+    oled.println(" Exit Setup");
+
   } else if (amode == M_NORMAL) {
     if (hasFix) {
       if (hasFix != oldFix){
@@ -119,7 +186,7 @@ void updateDisplay() {
       oled.print("Int:    ");
       oled.println(interval);
       oled.print("Packet: ");
-      oled.println(Frame_Counter_Tx);
+      oled.println(packets);
       oled.print("Alt:    ");
       oled.println(buffer[3]);
       oled.print("Speed:  ");
@@ -139,7 +206,7 @@ void updateDisplay() {
       oled.print("Int:    ");
       oled.println(interval);
       oled.print("Packet: ");
-      oled.println(Frame_Counter_Tx);
+      oled.println(packets);
       oled.print("Bat:    ");
       oled.println((float)readSupplyVoltage()/1000);
     }
@@ -166,9 +233,17 @@ void setup() {
   oled.setFlipMode(1);
   oled.clear();
   
+  // Get Settings from EEPROM
+
+  EEPROM.get(EEPROM_KEYSET_ADR, keyset);
+  if (keyset > 2) keyset = 1;
+  if (keyset < 1) keyset = 1;
+  EEPROM.get(EEPROM_INTERVAL_ADR, interval);
+  if (interval < 10 || interval > 30) interval = 20;
+
   // Lora Initialization
   rfm.init();
-  lora.setKeys(NwkSkey, AppSkey, DevAddr);
+  loraKeySetup(keyset);
 }
 
 // Main Loop
@@ -186,6 +261,7 @@ void loop() {
     
     gps.buildPacket(loraBuffer);
     lora.Send_Data((unsigned char *)&loraBuffer, sizeof(loraBuffer), Frame_Counter_Tx, SF7BW125, 0x01);
+    packets++;
     Frame_Counter_Tx++;
     lastmillis = millis();
   } else {