Diff: main.cpp

Revision:

8:3dd7a4231f6e

Parent:

7:667534ecd34e

Child:

9:6a6223dc937b

--- a/main.cpp	Thu Nov 05 14:14:43 2020 +0000
+++ b/main.cpp	Thu Nov 05 16:03:19 2020 +0000
@@ -1,9 +1,18 @@
 #include "mbed.h" // Include the library of Mbed
 #include "C12832.h"  // Include the library of the specific LCD
+#include "mbed_trace.h"
+#include "mbed_events.h"
+#include "LoRaWANInterface.h"
+#include "SX1276_LoRaRadio.h"
+#define DEVICEID "FELIX_220014243"
+#define YELLOWBLINKINGDURATION 10
+#define REDLIGHTONDURATION 15
+// The port we're sending and receiving on
+#define MBED_CONF_LORA_APP_PORT     1
 
-DigitalOut yellowled(p5, 1); // Initializing the yellow light ON (same as yellowled = 1)
-DigitalOut redled(p7, 0); // Initializing the Red light to OFF (same as redled = 0)
-InterruptIn pedestrianbutton(p6);
+DigitalOut yellowled(LED4, 1); // Initializing the yellow light ON (same as yellowled = 1)
+DigitalOut redled(LED1, 0); // Initializing the Red light to OFF (same as redled = 0)
+InterruptIn pedestrianbutton(p5);
 
 C12832 lcd(SPI_MOSI, SPI_SCK, SPI_MISO, p8, p11); // create an instance of LCD
 
@@ -12,9 +21,84 @@
 char pedestrianAdvert[] = "2 COFFEES FOR THE PRICE OF 1. ONLY AT CAMELIA";
 char carDriverAdvert[] = "RECEIVE 5%% REDUCTION ON YOUR FULL TANK ....";
 
-#define YELLOWBLINKINGDURATION 10
-#define REDLIGHTONDURATION 15
+
+// Device credentials, register device as OTAA in The Things Network and copy credentials here
+static uint8_t DEV_EUI[] = { 0x26, 0x10, 0x20, 0x20, 0x11, 0x11, 0x20, 0x20 };
+static uint8_t APP_EUI[] = { 0x70, 0xB3, 0xD5, 0x7E, 0xD0, 0x03, 0x74, 0x72 };
+static uint8_t APP_KEY[] = { 0x75, 0x57, 0x56, 0x65, 0xB1, 0x8A, 0x17, 0x52, 0x1B, 0x2D, 0x45, 0xD9, 0xFC, 0x90, 0x9E, 0x05 };
+
+
+// Peripherals (LoRa radio, temperature sensor and button)
+SX1276_LoRaRadio radio(D11, D12, D13, D10, A0, D2, D3, D4, D5, D8, D9, NC, NC, NC, NC, A4, NC, NC);
+InterruptIn btn(BUTTON1);
+// EventQueue is required to dispatch events around
+static EventQueue ev_queue;
+// Constructing Mbed LoRaWANInterface and passing it down the radio object.
+static LoRaWANInterface lorawan(radio);
+// Application specific callbacks
+static lorawan_app_callbacks_t callbacks;
+// LoRaWAN stack event handler
+static void lora_event_handler(lorawan_event_t event);
+
+// Send a message over LoRaWAN
+static void send_message(long int timestamp, int value) {
+    uint8_t tx_buffer[50] = { 0 };
+    // Sending strings over LoRaWAN is not recommended
+    sprintf((char*) tx_buffer, "{\"deviceId\":\"%s\", \"timestamp\":%ld,\"value\":%d}", DEVICEID, timestamp, value);
+    int packet_len = strlen((char*) tx_buffer);
+    printf("Sending %d bytes: \"%s\"\n", packet_len, tx_buffer);
+    int16_t retcode = lorawan.send(MBED_CONF_LORA_APP_PORT, tx_buffer, packet_len, MSG_UNCONFIRMED_FLAG);
+    // for some reason send() returns -1... I cannot find out why, the stack returns the right number. I feel that this is some weird Emscripten quirk
+    if (retcode < 0) {
+        retcode == LORAWAN_STATUS_WOULD_BLOCK ? printf("send - duty cycle violation\n")
+                : printf("send() - Error code %d\n", retcode);
+        return;
+    }
+    printf("%d bytes scheduled for transmission\n", retcode);
+}
 
+int initialize_lora() {
+    if (DEV_EUI[0] == 0x0 && DEV_EUI[1] == 0x0 && DEV_EUI[2] == 0x0 && DEV_EUI[3] == 0x0 && DEV_EUI[4] == 0x0 && DEV_EUI[5] == 0x0 && DEV_EUI[6] == 0x0 && DEV_EUI[7] == 0x0) {
+        printf("Set your LoRaWAN credentials first!\n");
+        return -1;
+    }
+    printf("Press BUTTON1 to send the current value of the temperature sensor!\n");
+    // Enable trace output for this demo, so we can see what the LoRaWAN stack does
+    mbed_trace_init();
+    if (lorawan.initialize(&ev_queue) != LORAWAN_STATUS_OK) {
+        printf("LoRa initialization failed!\n");
+        return -1;
+    }
+        // prepare application callbacks
+    callbacks.events = mbed::callback(lora_event_handler);
+    lorawan.add_app_callbacks(&callbacks);
+    // Disable adaptive data rating
+    if (lorawan.disable_adaptive_datarate() != LORAWAN_STATUS_OK) {
+        printf("disable_adaptive_datarate failed!\n");
+        return -1;
+    }
+    lorawan.set_datarate(5); // SF7BW125
+    lorawan_connect_t connect_params;
+    connect_params.connect_type = LORAWAN_CONNECTION_OTAA;
+    connect_params.connection_u.otaa.dev_eui = DEV_EUI;
+    connect_params.connection_u.otaa.app_eui = APP_EUI;
+    connect_params.connection_u.otaa.app_key = APP_KEY;
+    connect_params.connection_u.otaa.nb_trials = 3;
+
+    lorawan_status_t retcode = lorawan.connect(connect_params);
+
+    if (retcode == LORAWAN_STATUS_OK ||
+        retcode == LORAWAN_STATUS_CONNECT_IN_PROGRESS) {
+    } else {
+        printf("Connection error, code = %d\n", retcode);
+        return -1;
+    }
+
+    printf("Connection - In Progress ...\r\n");
+    // make your event queue dispatching events forever
+    ev_queue.dispatch_forever();
+    return 0;
+}
 
 /**
  * Blinking a yellow LED.
@@ -22,6 +106,8 @@
  * @param duration length of time to blink .
  */
 static void yellowblinking(int duration){
+    // Data to send
+   // send_message("FELIX", 220014243, 1);
     int counter=0; 
     while(counter < duration)
     {
@@ -38,6 +124,8 @@
  * @param duration length of time for pedestrian to cross.
  */
 static void pedestriancrossing(int duration){
+   // Data to send
+    //send_message("FELIX", 220014243, 2);
     redled = 1;
     int counter=0; 
     while(counter < duration)
@@ -71,13 +159,16 @@
      if (state == 0) // YELLOW IS ON AND RED IS OFF
      {
         state = 1; // YELLOW IS BLINKING AND RED IS OFF
+        send_message(220014243, state);
         display(pedestrianAdvert);
         yellowblinking(YELLOWBLINKINGDURATION);
         wait(1);
         state = 2;  // YELLOW IS OFF AND RED IS ON
+        send_message(220014243, state);
         display(carDriverAdvert);
         pedestriancrossing(REDLIGHTONDURATION);
         state = 0;
+        send_message(220014243, state);
         lcd.cls();
      }
      if(state == 2) // RED 
@@ -87,11 +178,35 @@
 }
 
 int main() {
-    pedestrianbutton.rise(&pedestrian_isr); // Registering an ISR for button click
-    while (1) { // DO FOREVER 
-       wait(1);
-    }
+    pedestrianbutton.rise(ev_queue.event(&pedestrian_isr)); // Registering an ISR for button click
+    initialize_lora();
+    // Data to send
+//send_message("FELIX", 220014243, 0);
 }
 
-
-
+// Event handler
+static void lora_event_handler(lorawan_event_t event) {
+    switch (event) {
+        case CONNECTED:
+            printf("Connection - Successful\n");
+            break;
+        case DISCONNECTED:
+            ev_queue.break_dispatch();
+            printf("Disconnected Successfully\n");
+            break;
+        case TX_DONE:
+            printf("Message Sent to Network Server\n");
+            break;
+        case TX_TIMEOUT:
+        case TX_ERROR:
+        case TX_CRYPTO_ERROR:
+        case TX_SCHEDULING_ERROR:
+            printf("Transmission Error - EventCode = %d\n", event);
+            break;
+        case JOIN_FAILURE:
+            printf("OTAA Failed - Check Keys\n");
+            break;
+        default:
+            MBED_ASSERT("Unknown Event");
+    }
+}
\ No newline at end of file