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:
10:df54436ecd38
Parent:
2:0e2ef866af95
Child:
19:f89baed3bd6f
--- a/wnc_control.cpp	Mon Jul 11 22:17:20 2016 +0000
+++ b/wnc_control.cpp	Mon Jul 11 23:54:24 2016 +0000
@@ -23,6 +23,7 @@
 
 // Contains the RAW WNC UART responses
 static string wncStr;
+static int socketOpen = 0;
 
 void software_init_mdm(void)
 {
@@ -70,11 +71,15 @@
       }
       else if (WNC_MDM_ERR == WNC_CMD_ERR)
         pc.puts("Socket open fail!!!!\r\n");
+      else
+        socketOpen = 1;
     } while (WNC_MDM_ERR != WNC_OK);
 }
 
 void sockwrite_mdm(const char * s)
 {
+    if (socketOpen == 1)
+    {
     do
     {
       WNC_MDM_ERR = WNC_OK;
@@ -92,10 +97,15 @@
         software_init_mdm();
       }
     } while (WNC_MDM_ERR != WNC_OK);
+    }
+    else
+      puts("Socket is closed for write!\r\n");
 }
 
 void sockread_mdm(string * sockData, int len, int retries)
 {
+    if (socketOpen == 1)
+    {
     do
     {
       WNC_MDM_ERR = WNC_OK;
@@ -108,6 +118,9 @@
       else if (WNC_MDM_ERR == WNC_CMD_ERR)
         puts("Sock read fail!!!!\r\n");
     } while (WNC_MDM_ERR != WNC_OK);
+    }
+    else
+      puts("Socket is closed for read\r\n");
 }
 
 void sockclose_mdm(void)
@@ -116,6 +129,10 @@
     {
       WNC_MDM_ERR = WNC_OK;
       at_sockclose_wnc();
+      // Assume close happened even if it went bad
+      // going bad will result in a re-init anyways and if close
+      // fails we're pretty much in bad state and not much can do
+      socketOpen = 0;
       if (WNC_MDM_ERR == WNC_NO_RESPONSE)
       {
         reinitialize_mdm();