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:
30:33be8e2992f3
Parent:
22:41e6c417ace1
Child:
32:1e052a3e73fe
--- a/wnc_control.cpp	Fri Jul 22 00:35:37 2016 +0000
+++ b/wnc_control.cpp	Fri Jul 22 15:06:52 2016 +0000
@@ -31,7 +31,7 @@
   {
     WNC_MDM_ERR = WNC_OK;
     at_init_wnc();
-    if (WNC_MDM_ERR != WNC_OK)
+    if (WNC_MDM_ERR == WNC_NO_RESPONSE)
       reinitialize_mdm();
   } while (WNC_MDM_ERR != WNC_OK); 
 }
@@ -55,7 +55,7 @@
       }
     } while (WNC_MDM_ERR != WNC_OK);
     
-    pc.printf("My Server IP: %s\r\n", MyServerIpAddress.data());
+    pc.printf("My Server IP: %s\r\n", MyServerIpAddress.c_str());
 }
 
 void sockopen_mdm(void)
@@ -104,25 +104,37 @@
       puts("Socket is closed for write!\r\n");
 }
 
-void sockread_mdm(string * sockData, int len, int retries)
+unsigned sockread_mdm(string * sockData, int len, int retries)
 {
+    unsigned n = 0;
+    
+    // Clean slate:
+    sockData->erase();
+    
     if (socketOpen == 1)
     {
     do
     {
       WNC_MDM_ERR = WNC_OK;
-      at_sockread_wnc(sockData, len, retries);
+      n = at_sockread_wnc(sockData, len, retries);
       if (WNC_MDM_ERR == WNC_NO_RESPONSE)
       {
-        reinitialize_mdm();
-        software_init_mdm();
+        if (n == 0)
+        {
+            reinitialize_mdm();
+            software_init_mdm();
+        }
+        else
+            puts("Sock read partial data!!!\r\n");
       }
       else if (WNC_MDM_ERR == WNC_CMD_ERR)
         puts("Sock read fail!!!!\r\n");
-    } while (WNC_MDM_ERR != WNC_OK);
+    } while (WNC_MDM_ERR == WNC_NO_RESPONSE);
     }
     else
       puts("Socket is closed for read\r\n");
+      
+    return (n);
 }
 
 void sockclose_mdm(void)
@@ -190,6 +202,9 @@
   static const char * rsp_lst[] = { "OK", "ERROR", NULL };
   int len;
   
+  // Per WNC between every AT cmd:
+  wait_ms(20);
+  
   pc.printf("Send: %s\r\n",s);
   int res = mdm_sendAtCmdRsp(s, rsp_lst, ms_timeout, &wncStr, &len);
   *r = &wncStr;   // Return a pointer to the static string
@@ -197,7 +212,7 @@
   if (res >= 0)
   {
       pc.puts("[");
-      pc.puts(wncStr.data());
+      pc.puts(wncStr.c_str());
       pc.puts("]\n\r");
       if (res > 0)
       {
@@ -230,7 +245,7 @@
   string cmd_str("AT%PDNSET=1,");
   cmd_str += MY_APN_STR;
   cmd_str += ",IP";
-  send_wnc_cmd(cmd_str.data(), &pRespStr, 2*WNC_TIMEOUT_MS); // Set APN, cmd seems to take a little longer sometimes
+  send_wnc_cmd(cmd_str.c_str(), &pRespStr, 2*WNC_TIMEOUT_MS); // Set APN, cmd seems to take a little longer sometimes
   send_wnc_cmd("AT@INTERNET=1", &pRespStr, WNC_TIMEOUT_MS);  // Internet services enabled
   send_wnc_cmd("AT@SOCKDIAL=1", &pRespStr, WNC_TIMEOUT_MS);
 }
@@ -243,7 +258,7 @@
   cmd_str += ipStr;
   cmd_str += "\",";
   cmd_str += port;
-  send_wnc_cmd(cmd_str.data(), &pRespStr, WNC_TIMEOUT_MS);
+  send_wnc_cmd(cmd_str.c_str(), &pRespStr, WNC_TIMEOUT_MS);
 }
 
 void at_sockclose_wnc(void)
@@ -258,7 +273,7 @@
   string str(s);
   str = "AT@DNSRESVDON=\"" + str;
   str += "\"\r\n";
-  if (send_wnc_cmd(str.data(), &pRespStr, WNC_TIMEOUT_MS) == 0)
+  if (send_wnc_cmd(str.c_str(), &pRespStr, WNC_TIMEOUT_MS) == 0)
   {
     size_t pos_start = pRespStr->find(":\"") + 2;
     if (pos_start !=  string::npos)
@@ -311,7 +326,7 @@
       cmd_str += num2str;
     }
     cmd_str += "\"";
-    send_wnc_cmd(cmd_str.data(), &pRespStr, WNC_TIMEOUT_MS);
+    send_wnc_cmd(cmd_str.c_str(), &pRespStr, WNC_TIMEOUT_MS);
   }
   else
     pc.puts("sockwrite Err, string to long\r\n");
@@ -322,6 +337,10 @@
   unsigned i;
   string * pRespStr;
   string cmd_str("AT@SOCKREAD=1,");
+
+  // Clean slate
+  pS->erase();
+
   if (n <= 1500)
   {
     char num2str[6];
@@ -336,7 +355,7 @@
       // between each retry.
       wait_ms(10);
       
-      send_wnc_cmd(cmd_str.data(), &pRespStr, WNC_TIMEOUT_MS);
+      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;
       i = pos_end - pos_start + 1;
@@ -344,11 +363,10 @@
       {
         retries = 0;  // If any data found stop retrying
         string byte;
-        pS->erase();
         while (pos_start < pos_end)
         {
           byte = pRespStr->substr(pos_start, 2);
-          *pS += (char)strtol(byte.data(), NULL, 16);
+          *pS += (char)strtol(byte.c_str(), NULL, 16);
           pos_start += 2;
         }
         return i;