Srdjan Veljkovic / Mbed 2 deprecated Avnet_ATT_Cellular_Pubnub

Pubnub demo for AT&T IoT Starter Kit. Functionally similar to the Flow demo.

Dependencies:   FXOS8700CQ MODSERIAL mbed

http://pubnub.github.io/slides/workshop/pictures/broadcast.png

Pubnub demo for AT&T IoT Starter Kit

This demo is functionally similar to the Flow demo, so you can find general information here: https://developer.mbed.org/users/JMF/code/Avnet_ATT_Cellular_IOT/.

The only difference is that we use Pubnub to publish the measurements and subscribe to receiving the instructions to set the LED.

Settings

Pubnub related settings are:

Pubnub settings in `config_me.h`

PUBNUB_SUBSCRIBE_KEY
PUBNUB_PUBLISH_KEY
PUBNUB_CHANNEL

All are documented in their respective comments.

Pubnub context class

Similar to Pubnub SDKs, we provide a Pubnub context class. It is defined in pubnub.h header file and implemented in pubnub.cpp.

It provides only the fundamental "publish" and "subscribe" methods. They are documented in the header file.

This class is reusable in other code (it is not specific to this demo), it has a very narrow interface to the AT&T IoT cellular modem code. For example of use, you can look at the main() (in main.c).

Sample of published data

Published message w/measurement data

{"serial":"vstarterkit001","temp":89.61,"humidity":35,"accelX":0.97,"accelY":0.013,"accelZ":-0.038}

Don't worry, nobody got burnt, the temperature is in degrees Fahrenheit. :)

Publish a message (from, say, the Pubnub console http://pubnub.com/console) of the form {"LED":<name-of-the-color>} on the channel that this demo listens to (default is hello_world) to turn the LED to that color on the Starter Kit:

Turn LED to red

{"LED":"Red"}

Turn LED to green

{"LED":"Green"}

Turn LED to blue

{"LED":"Blue"}

Diff: main.cpp

Revision:
81:a5df87708b9a
Parent:
77:c65eae5b9958
--- a/main.cpp	Tue Aug 16 13:55:59 2016 +0000
+++ b/main.cpp	Fri Sep 02 17:44:55 2016 +0000
@@ -23,6 +23,8 @@
 #include "cell_modem.h"
 #include "hardware.h"
 
+#include "pubnub.h"
+
 I2C i2c(PTC11, PTC10);    //SDA, SCL -- define the I2C pins being used
 MODSERIAL pc(USBTX, USBRX, 256, 256); // tx, rx with default tx, rx buffer sizes
 MODSERIAL mdm(PTD3, PTD2, 4096, 4096);
@@ -71,42 +73,69 @@
     PUTS("\r\n\r\nApp Firmware: Release 1.0 - built: "__DATE__" "__TIME__"\r\n\r\n");
 }
 
-void GenerateModemString(char * modem_string)
+
+static void GeneratePubnubJSON(char *s, unsigned n)
 {
-    switch(iSensorsToReport)
-    {
-        case TEMP_HUMIDITY_ONLY:
-        {
-            sprintf(modem_string, "GET %s%s?serial=%s&temp=%s&humidity=%s %s%s\r\n\r\n", FLOW_BASE_URL, FLOW_INPUT_NAME, FLOW_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, FLOW_URL_TYPE, MY_SERVER_URL);
-            break;
-        }
-        case TEMP_HUMIDITY_ACCELEROMETER:
-        {
-            sprintf(modem_string, "GET %s%s?serial=%s&temp=%s&humidity=%s&accelX=%s&accelY=%s&accelZ=%s %s%s\r\n\r\n", FLOW_BASE_URL, FLOW_INPUT_NAME, FLOW_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, SENSOR_DATA.AccelX,SENSOR_DATA.AccelY,SENSOR_DATA.AccelZ, FLOW_URL_TYPE, MY_SERVER_URL);
-            break;
-        }
-        case TEMP_HUMIDITY_ACCELEROMETER_GPS:
-        {
-            sprintf(modem_string, "GET %s%s?serial=%s&temp=%s&humidity=%s&accelX=%s&accelY=%s&accelZ=%s&gps_satellites=%s&latitude=%s&longitude=%s&altitude=%s&speed=%s&course=%s %s%s\r\n\r\n", FLOW_BASE_URL, FLOW_INPUT_NAME, FLOW_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, SENSOR_DATA.AccelX,SENSOR_DATA.AccelY,SENSOR_DATA.AccelZ,SENSOR_DATA.GPS_Satellites,SENSOR_DATA.GPS_Latitude,SENSOR_DATA.GPS_Longitude,SENSOR_DATA.GPS_Altitude,SENSOR_DATA.GPS_Speed,SENSOR_DATA.GPS_Course, FLOW_URL_TYPE, MY_SERVER_URL);
-            break;
-        }
-        case TEMP_HUMIDITY_ACCELEROMETER_PMODSENSORS:
-        {
-            sprintf(modem_string, "GET %s%s?serial=%s&temp=%s&humidity=%s&accelX=%s&accelY=%s&accelZ=%s&proximity=%s&light_uv=%s&light_vis=%s&light_ir=%s %s%s\r\n\r\n", FLOW_BASE_URL, FLOW_INPUT_NAME, FLOW_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, SENSOR_DATA.AccelX,SENSOR_DATA.AccelY,SENSOR_DATA.AccelZ, SENSOR_DATA.Proximity, SENSOR_DATA.UVindex, SENSOR_DATA.AmbientLightVis, SENSOR_DATA.AmbientLightIr, FLOW_URL_TYPE, MY_SERVER_URL);
-            break;
-        }
-        case TEMP_HUMIDITY_ACCELEROMETER_PMODSENSORS_VIRTUALSENSORS:
-        {
-            sprintf(modem_string, "GET %s%s?serial=%s&temp=%s&humidity=%s&accelX=%s&accelY=%s&accelZ=%s&proximity=%s&light_uv=%s&light_vis=%s&light_ir=%s&virt_sens1=%s&virt_sens2=%s&virt_sens3=%s&virt_sens4=%s&virt_sens5=%s&virt_sens6=%s&virt_sens7=%s&virt_sens8=%s %s%s\r\n\r\n", FLOW_BASE_URL, FLOW_INPUT_NAME, FLOW_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, SENSOR_DATA.AccelX,SENSOR_DATA.AccelY,SENSOR_DATA.AccelZ, SENSOR_DATA.Proximity, SENSOR_DATA.UVindex, SENSOR_DATA.AmbientLightVis, SENSOR_DATA.AmbientLightIr, SENSOR_DATA.Virtual_Sensor1, SENSOR_DATA.Virtual_Sensor2, SENSOR_DATA.Virtual_Sensor3, SENSOR_DATA.Virtual_Sensor4, SENSOR_DATA.Virtual_Sensor5, SENSOR_DATA.Virtual_Sensor6, SENSOR_DATA.Virtual_Sensor7, SENSOR_DATA.Virtual_Sensor8, FLOW_URL_TYPE, MY_SERVER_URL);
-            break;
-        }
-        default:
-        {
-            sprintf(modem_string, "Invalid sensor selected\r\n\r\n");
-            break;
-        }
-    } //switch(iSensorsToReport)
-} //GenerateModemString        
+    switch (iSensorsToReport) {
+    case TEMP_HUMIDITY_ONLY:
+        snprintf(s, n, "{\"serial\":\"%s\",\"temp\":%s,\"humidity\":%s}", THE_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity);
+        break;
+    case TEMP_HUMIDITY_ACCELEROMETER:
+        snprintf(s, n, "{\"serial\":\"%s\",\"temp\":%s,\"humidity\":%s,\"accelX\":%s,\"accelY\":%s,\"accelZ\":%s}", THE_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, SENSOR_DATA.AccelX, SENSOR_DATA.AccelY, SENSOR_DATA.AccelZ);
+        break;
+    case TEMP_HUMIDITY_ACCELEROMETER_PMODSENSORS:
+        snprintf(s, n, "{\"serial\":\"%s\",\"temp\":%s,\"humidity\":%s,\"accelX\":%s,\"accelY\":%s,\"accelZ\":%s,\"proximity\":%s,\"light_uv\":%s,\"light_vis\":%s,\"light_ir\":%s}", THE_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, SENSOR_DATA.AccelX,SENSOR_DATA.AccelY,SENSOR_DATA.AccelZ, SENSOR_DATA.Proximity, SENSOR_DATA.UVindex, SENSOR_DATA.AmbientLightVis, SENSOR_DATA.AmbientLightIr);
+        break;
+    case TEMP_HUMIDITY_ACCELEROMETER_PMODSENSORS_VIRTUALSENSORS:
+        snprintf(s, n, "{\"serial\":\"%s\",\"temp\":%s,\"humidity\":%s,\"accelX\":%s,\"accelY\":%s,\"accelZ\":%s,\"proximity\":%s,\"light_uv\":%s,\"light_vis\":%s,\"light_ir\":%s,\"virt_sens1\":%s,\"virt_sens2\":%s,\"virt_sens3\":%s,\"virt_sens4\":%s,\"virt_sens5\":%s,\"virt_sens6\":%s,\"virt_sens7\":%s,\"virt_sens8\":%s}", 
+            THE_DEVICE_NAME, 
+            SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, 
+            SENSOR_DATA.AccelX,SENSOR_DATA.AccelY,SENSOR_DATA.AccelZ, 
+            SENSOR_DATA.Proximity, SENSOR_DATA.UVindex, SENSOR_DATA.AmbientLightVis, SENSOR_DATA.AmbientLightIr, 
+            SENSOR_DATA.Virtual_Sensor1, SENSOR_DATA.Virtual_Sensor2, 
+            SENSOR_DATA.Virtual_Sensor3, SENSOR_DATA.Virtual_Sensor4, 
+            SENSOR_DATA.Virtual_Sensor5, SENSOR_DATA.Virtual_Sensor6, 
+            SENSOR_DATA.Virtual_Sensor7, SENSOR_DATA.Virtual_Sensor8);
+        break;
+    default:
+        snprintf(s, n, "\"Invalid sensors selected: %d\"", iSensorsToReport);
+        break;
+    }
+}
+
+
+static void print_pubnub_result(pubnub_ctx::result r)
+{
+    switch (r) {
+    case pubnub_ctx::format_error:
+        PRINTF(RED "Pubnub response format error" DEF "\r\n");
+        break;
+    case pubnub_ctx::response_too_short:
+        PRINTF(RED "Pubnub response too short" DEF "\r\n");
+        break;
+    case pubnub_ctx::missing_open_bracket:
+        PRINTF(RED "Pubnub response missing open bracket `[`" DEF "\r\n");
+        break;
+    case pubnub_ctx::missing_close_bracket:
+        PRINTF(RED "Pubnub response missing close bracket `]`" DEF "\r\n");
+        break;
+    case pubnub_ctx::missing_time_token:
+        PRINTF(RED "Pubnub subscribe response missing time token" DEF "\r\n");
+        break;
+    case pubnub_ctx::bad_time_token:
+        PRINTF(RED "Pubnub subscribe response bad time token" DEF "\r\n");
+        break;
+    case pubnub_ctx::publish_failed:
+        PRINTF(RED "Pubnub publish failed" DEF "\r\n");
+        break;
+    case pubnub_ctx::ok:
+        PRINTF(GRN "Pubnub transaction success" DEF "\r\n");
+        break;
+    default:
+        PRINTF(RED "Unknown Pubnub erorr %d" DEF "\r\n", static_cast<int>(r));
+        break;
+    }
+}
             
             
 //Periodic timer
@@ -141,9 +170,9 @@
 //********************************************************************************************************************************************
 //* Process the JSON response.  In this example we are only extracting a LED color. 
 //********************************************************************************************************************************************
-bool parse_JSON(char* json_string)
+bool parse_JSON(char const* json_string)
 {
-    char* beginquote;
+    char const* beginquote;
     char token[] = "\"LED\":\"";
     beginquote = strstr(json_string, token );
     if ((beginquote != 0))
@@ -205,7 +234,9 @@
     }
 } //parse_JSON
 
-int main() {
+
+int main()
+{
     static unsigned ledOnce = 0;
     //delay so that the debug terminal can open after power-on reset:
     wait (5.0);
@@ -233,26 +264,38 @@
     iTimer1Interval_ms = SENSOR_UPDATE_INTERVAL_MS;
     OneMsTicker.attach(OneMsFunction, 0.001f) ;
 
+    // Create the Pubnub context and message vector
+    pubnub_ctx pb(PUBNUB_PUBLISH_KEY, PUBNUB_SUBSCRIBE_KEY);
+    std::vector<std::string> messages;
+    
+    // If you wish, you can set the UUID to use - which will make that UUID
+    // visible for Presence related Pubnub features
+    // pb.set_uuid(THE_DEVICE_NAME);
+
     // Send and receive data perpetually
     while(1) {
-        #ifdef USE_VIRTUAL_SENSORS
+#ifdef USE_VIRTUAL_SENSORS
         ProcessUsbInterface();
-        #endif
+#endif
         if  (bTimerExpiredFlag)
         {
             bTimerExpiredFlag = false;
             read_sensors(); //read available external sensors from a PMOD and the on-board motion sensor
-            char modem_string[512];
-            GenerateModemString(&modem_string[0]);
-            char myJsonResponse[512];
-            if (cell_modem_Sendreceive(&modem_string[0], &myJsonResponse[0]))
-            {
-                if (!ledOnce)
-                {
-                    ledOnce = 1;
-                    SetLedColor(0x2); //Green
-                }
-                parse_JSON(&myJsonResponse[0]);
+
+            char json_string[512];
+            GeneratePubnubJSON(json_string, sizeof json_string);
+            print_pubnub_result(pb.publish(PUBNUB_CHANNEL, json_string));
+            
+            messages.clear();
+            print_pubnub_result(pb.subscribe(PUBNUB_CHANNEL, messages));
+            if (!ledOnce && !messages.empty()) {
+                ledOnce = 1;
+                SetLedColor(0x2);
+            }
+            for (std::vector<std::string>::iterator it = messages.begin(); it != messages.end(); ++it) {
+                char const *s = it->c_str();
+                PRINTF(BLU "Pubnub message: %s" DEF "\n", s);
+                parse_JSON(s);
             }
         } //bTimerExpiredFlag
     } //forever loop