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: wnc_control.cpp

Revision:
73:da723fedfdd2
Parent:
68:6e311c747045
Child:
75:8cc98a3b9c62
--- a/wnc_control.cpp	Thu Aug 11 17:04:09 2016 +0000
+++ b/wnc_control.cpp	Fri Aug 12 19:47:29 2016 +0000
@@ -37,7 +37,8 @@
     WNC_OK =0,
     WNC_CMD_ERR = -1,
     WNC_NO_RESPONSE = -2,
-    WNC_CELL_LINK_DOWN = -3
+    WNC_CELL_LINK_DOWN = -3,
+    WNC_EXTERR = -4
 };
 
 // Contains result of last call to send_wnc_cmd(..)
@@ -58,12 +59,12 @@
     cmd_str += MY_APN_STR;
     cmd_str += ",IP";
     at_send_wnc_cmd(cmd_str.c_str(), &pRespStr, 4*WNC_TIMEOUT_MS); // Set APN, cmd seems to take a little longer sometimes
-    PUTS(cmd_str.c_str());
  }   
 
   static bool reportStatus = true;
   do
   {
+      PUTS("------------ software_init_mdm! --------->\r\n");
       if (check_wnc_ready() == 0)
       {
           if (reportStatus == false)
@@ -157,6 +158,13 @@
         PUTS("Socket Write fail!!!\r\n");
         software_init_mdm();
       }
+      else if (WNC_MDM_ERR == WNC_EXTERR)
+      {
+        pc.puts("Socket Disconnected (broken) !!!\r\n");
+        sockclose_mdm();
+        sockopen_mdm();
+        //software_init_mdm();
+      }
     } while (WNC_MDM_ERR != WNC_OK);
     }
     else
@@ -283,6 +291,8 @@
   
     // SIM card OK, now check for signal and cellular network registration
     cmdRes1 = at_send_wnc_cmd("AT+CREG?", &pRespStr, WNC_TIMEOUT_MS);      // Check if registered on network
+    if (pRespStr->size() > 0)
+    {
     pos = pRespStr->find("CREG: ");
     if (pos != string::npos)
     {
@@ -295,6 +305,7 @@
 #ifdef WNC_CMD_DEBUG_ON_VERBOSE
             PUTS("------------ WNC Cell Link Down! ------>\r\n");
 #endif
+            wait_ms(3000);
             return (-2);
         }
     }
@@ -302,7 +313,15 @@
 #ifdef WNC_CMD_DEBUG_ON_VERBOSE
     PUTS("------------ WNC Ready ---------------->\r\n");
 #endif
-  
+    }
+    else
+    {
+#ifdef WNC_CMD_DEBUG_ON_VERBOSE
+        PUTS("------------ CREG No Reply !----------->\r\n");
+#endif
+        return (-2);
+    }
+
     return (0);
 }
 
@@ -319,6 +338,7 @@
      PUTS("FAIL send cmd: ");
      #ifdef WNC_CMD_DEBUG_ON_VERBOSE
      PUTS(s);
+
      #else
      string truncStr(s, 50);
      truncStr += "\r\n";
@@ -354,7 +374,10 @@
   if (cmdRes == -2)
      WNC_MDM_ERR = WNC_NO_RESPONSE;
 
-  if (cmdRes == 0)
+  if (cmdRes == -3)
+     WNC_MDM_ERR = WNC_EXTERR;
+
+ if (cmdRes == 0)
      WNC_MDM_ERR = WNC_OK;
   
   return (cmdRes);
@@ -362,7 +385,7 @@
 
 int at_send_wnc_cmd(const char * s, string ** r, int ms_timeout)
 {
-  static const char * rsp_lst[] = { "OK", "ERROR", NULL };
+  static const char * rsp_lst[] = { "OK", "ERROR", "@EXTERR", NULL };
   int len;
 
 #ifdef WNC_CMD_DEBUG_ON
@@ -403,10 +426,14 @@
       #endif
 #endif
 
-      if (res > 0)
+      if (res == 0) {
+          /* OK */
+          return 0;
+      } else if (res == 2) {
+          /* @EXTERR */
+          return -3;
+      } else
           return -1;
-      else
-          return 0;
   }
   else
   {
@@ -496,7 +523,11 @@
   cmd_str += "\",";
   cmd_str += port;
   cmd_str += ",30";
-  send_wnc_cmd(cmd_str.c_str(), &pRespStr, 31000);
+  int cmd = send_wnc_cmd(cmd_str.c_str(), &pRespStr, 31000);
+  if (cmd != WNC_OK) {
+      // Per WNC: re-close even if open fails!
+      at_sockclose_wnc();
+  }
 }
 
 void at_sockclose_wnc(void)
@@ -541,6 +572,7 @@
   string * pRespStr;
   char num2str[6];
   size_t sLen = strlen(s);
+  int res;
   if (sLen <= 1500)
   {
     string cmd_str("AT@SOCKWRITE=1,");
@@ -560,7 +592,9 @@
       cmd_str += num2str;
     }
     cmd_str += "\"";
-    send_wnc_cmd(cmd_str.c_str(), &pRespStr, 120000);
+    res = send_wnc_cmd(cmd_str.c_str(), &pRespStr, 120000);
+    if (res == -3)
+        PUTS("sockwrite is disconnect \r\n");
   }
   else
     PUTS("sockwrite Err, string to long\r\n");
@@ -589,29 +623,35 @@
       // between each retry.
       wait_ms(10);
       
-      send_wnc_cmd(cmd_str.c_str(), &pRespStr, WNC_TIMEOUT_MS);
-      
-      size_t pos_start = pRespStr->find("\"")  + 1;
-      size_t pos_end   = pRespStr->rfind("\"") - 1;
+      if (send_wnc_cmd(cmd_str.c_str(), &pRespStr, WNC_TIMEOUT_MS) == 0)
+      {
+        size_t pos_start = pRespStr->find("\"")  + 1;
+        size_t pos_end   = pRespStr->rfind("\"") - 1;
       
-      // Make sure search finds what it's looking for!
-      if (pos_start != string::npos && pos_end != string::npos)
+        // Make sure search finds what it's looking for!
+        if (pos_start != string::npos && pos_end != string::npos)
           i = (pos_end - pos_start + 1);  // Num hex chars, 2 per byte
-      else
+        else
           i = 0;
           
-      if (i > 0)
+        if (i > 0)
+        {
+            retries = 1;  // If any data found retry 1 more time to catch data that might be in another
+                          //  WNC payload
+            string byte;
+            while (pos_start < pos_end)
+            {
+              byte = pRespStr->substr(pos_start, 2);
+              *pS += (char)strtol(byte.c_str(), NULL, 16);
+              pos_start += 2;
+            }
+            numBytes += i/2;
+        }
+      }
+      else
       {
-        retries = 1;  // If any data found retry 1 more time to catch data that might be in another
-                      //  WNC payload
-        string byte;
-        while (pos_start < pos_end)
-        {
-          byte = pRespStr->substr(pos_start, 2);
-          *pS += (char)strtol(byte.c_str(), NULL, 16);
-          pos_start += 2;
-        }
-        numBytes += i/2;
+          PUTS("no readsock reply!\r\n");
+          return (0);
       }
     }
   }