Diff: main.cpp

Revision:

18:6370da1de572

Parent:

16:02008a2a2569

Child:

20:ee34856ae510

--- a/main.cpp	Fri Dec 02 22:49:17 2016 +0000
+++ b/main.cpp	Tue Dec 06 22:31:15 2016 +0000
@@ -3,6 +3,9 @@
  */
 #include "mbed.h"
 
+// SD File System
+#include "SDFileSystem.h"
+
 // Serial extension
 #include "MODSERIAL.h"
 
@@ -36,7 +39,7 @@
 #define NUM_COLORS   5
 
 // AWS defines
-#define PATH_MAX    4096
+#define PATH_MAX    1024
 #define MAX_LENGTH_OF_UPDATE_JSON_BUFFER 200 // NOTE: Be wary of this if your JSON doc grows
 #define SHADOW_SYNC_INTERVAL 3.0             // How often we sync with AWS Shadow (in seconds)
 
@@ -79,13 +82,11 @@
 bool buttonOverride = false;
 InterruptIn Interrupt(SW3);
 
-// Default cert location
-//char certDirectory[PATH_MAX + 1] = "../../../certs";
-
-// Default MQTT HOST URL is pulled from the aws_iot_config.h
+// These defines are pulled from aws_iot_config.h
 char HostAddress[255] = AWS_IOT_MQTT_HOST;
-
-// Default MQTT port is pulled from the aws_iot_config.h
+char MqttClientID[32] = AWS_IOT_MQTT_CLIENT_ID;
+char ThingName[32] = AWS_IOT_MY_THING_NAME;
+char PortString[5] = "8883";
 uint32_t port = AWS_IOT_MQTT_PORT;
 
 //=====================================================================================================================
@@ -101,6 +102,9 @@
 // USB Serial port (to PC)
 MODSERIAL pc(USBTX,USBRX,256,256);
 
+// SD card access (MOSI, MISO, SCK, CS)
+SDFileSystem sd(PTE3, PTE1, PTE2, PTE4, "sd");
+
 //=====================================================================================================================
 //
 // Functions
@@ -122,7 +126,7 @@
 //* LED Color 0=Off to 7=White.  3 bits represent BGR (bit0=Red, bit1=Green, bit2=Blue) 
 //*********************************************************************************************************************
 void SetLedColor(unsigned char ucColor)
-{
+{    
     //Note that when an LED is on, you write a 0 to it:
     led_red = !(ucColor & 0x1); //bit 0
     led_green = !(ucColor & 0x2); //bit 1
@@ -236,25 +240,16 @@
     
     INFO("AWS IoT SDK Version(dev) %d.%d.%d-%s", VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH, VERSION_TAG);
 
-    // TODO: We could try to pull the certs from an SD card
-    /*
-    char rootCA[PATH_MAX + 1];
-    char clientCRT[PATH_MAX + 1];
-    char clientKey[PATH_MAX + 1];
-    char CurrentWD[PATH_MAX + 1];
-    char cafileName[] = AWS_IOT_ROOT_CA_FILENAME;
-    char clientCRTName[] = AWS_IOT_CERTIFICATE_FILENAME;
-    char clientKeyName[] = AWS_IOT_PRIVATE_KEY_FILENAME;
-  
-    getcwd(CurrentWD, sizeof(CurrentWD));
-    sprintf(rootCA, "%s/%s/%s", CurrentWD, certDirectory, cafileName);
-    sprintf(clientCRT, "%s/%s/%s", CurrentWD, certDirectory, clientCRTName);
-    sprintf(clientKey, "%s/%s/%s", CurrentWD, certDirectory, clientKeyName);
-
-    DEBUG("Using rootCA %s", rootCA);
-    DEBUG("Using clientCRT %s", clientCRT);
-    DEBUG("Using clientKey %s", clientKey);
-    */
+#ifdef USING_SD_CARD
+    // Paths for certs from SD card
+    INFO("Using SD card files for AWS config.");  
+    DEBUG("- mqtt config path: %s", AWS_MQTT_CONFIG_FILENAME);
+    DEBUG("- rootCA path: %s", AWS_IOT_ROOT_CA_FILENAME);
+    DEBUG("- clientCRT path: %s", AWS_IOT_CERTIFICATE_FILENAME);
+    DEBUG("- clientKey path: %s", AWS_IOT_PRIVATE_KEY_FILENAME);
+#else
+    INFO("Using #defines in aws_iot_config.h and certs from certs.cpp for AWS config.");      
+#endif
     
     // Startup signal - blinks through RGBW then turns off
     SetLedColor(COLOR_RED);
@@ -266,28 +261,34 @@
     SetLedColor(COLOR_WHITE);
     wait(.5);
     SetLedColor(COLOR_OFF);
-    
+      
     // Setup SW3 button to falling edge interrupt
     Interrupt.fall(&sw3ButtonHandler);
       
     // Boot the Avnet Shield before any other operations
     net_modem_boot();
       
-    INFO("Initialize the MQTT client...");
-    MQTTClient_t mqttClient;
-    aws_iot_mqtt_init(&mqttClient);
-
+    // Intialize MQTT/Cert parameters
     ShadowParameters_t sp = ShadowParametersDefault;
+#ifdef USING_SD_CARD
+    rc = (IoT_Error_t)mbedtls_mqtt_config_parse_file(&sp, AWS_MQTT_CONFIG_FILENAME);
+    if (NONE_ERROR != rc) {
+        ERROR("Failed to initialize mqtt parameters %d", rc);
+        return rc;
+    }   
+    sp.pClientCRT = AWS_IOT_CERTIFICATE_FILENAME;
+    sp.pClientKey = AWS_IOT_PRIVATE_KEY_FILENAME;
+    sp.pRootCA = AWS_IOT_ROOT_CA_FILENAME;
+#else
     sp.pMyThingName = AWS_IOT_MY_THING_NAME;
     sp.pMqttClientId = AWS_IOT_MQTT_CLIENT_ID;
     sp.pHost = HostAddress;
     sp.port = port;
-    //sp.pClientCRT = clientCRT;
-    //sp.pClientKey = clientKey;
-    //sp.pRootCA = rootCA;
-    sp.pClientCRT = AWS_IOT_CERTIFICATE_FILENAME;
-    sp.pClientKey = AWS_IOT_PRIVATE_KEY_FILENAME;
-    sp.pRootCA = AWS_IOT_ROOT_CA_FILENAME;
+#endif
+
+    INFO("Initialize the MQTT client...");
+    MQTTClient_t mqttClient;
+    aws_iot_mqtt_init(&mqttClient);
 
     INFO("Shadow Init...");
     rc = aws_iot_shadow_init(&mqttClient);
@@ -357,14 +358,32 @@
                             
                 if (rc == NONE_ERROR) {
                     INFO("Update Shadow: %s", JsonDocumentBuffer);
-                    rc = aws_iot_shadow_update(&mqttClient, AWS_IOT_MY_THING_NAME, JsonDocumentBuffer,
+                    rc = aws_iot_shadow_update(&mqttClient, sp.pMyThingName, JsonDocumentBuffer,
                             ShadowUpdateStatusCallback, NULL, 8, true);
                 }
             }
         }      
-        INFO("*****************************************************************************************\n");
-         
-        // Set LED color then wait an loop again     
+                
+        // Set LED color then wait an loop again
+        switch (ledColor) {
+             case COLOR_OFF:
+                 INFO("LED: OFF");
+                 break;
+             case COLOR_RED:
+                 INFO("LED: RED");
+                 break;
+             case COLOR_GREEN:
+                 INFO("LED: GREEN");
+                 break;
+             case COLOR_BLUE:
+                 INFO("LED: BLUE");
+                 break;
+             case COLOR_WHITE:
+                 INFO("LED: WHITE");
+                 break;
+        }
+        INFO("*****************************************************************************************");
+             
         SetLedColor(ledColor);
         wait(SHADOW_SYNC_INTERVAL);
     }