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"}

Files at this revision

API Documentation at this revision

Revision 50:8ac42961458c, committed 2016-07-24

Comitter:
fkellermavnet
Date:
Sun Jul 24 21:55:29 2016 +0000
Parent:
49:97f823273dc0
Child:
51:d9e5952545da
Commit message:
Made sockread char buffer larger to handle more data coming back from a server. For now, 10*1500 bytes.

Changed in this revision

config_me.h Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/config_me.h	Sun Jul 24 21:22:23 2016 +0000
+++ b/config_me.h	Sun Jul 24 21:55:29 2016 +0000
@@ -3,10 +3,13 @@
 
 // User must set these for own context:
 
+#define BUF_SIZE_FOR_N_MAX_SOCKREAD (10)
+#define MAX_WNC_SOCKREAD_PAYLOAD (1500)
+
 // This is the server's base URL name.  Example "www.google.com"
 // Note that when you Fork a FLOW, it will typically assign  either
 // "run-east.att.io" or "run-west.att.io", so be sure to check this.
-static const char * MY_SERVER_URL       = "run-west.att.io";
+static const char * MY_SERVER_URL       = "www.google.com"; // "run-west.att.io";
 
 // These are FLOW fields from the Endpoints tab:
 #define FLOW_BASE_URL                   "/1e464b19cdcde/774c88d68202/86694923d5bf28a/in/flow"

--- a/main.cpp	Sun Jul 24 21:22:23 2016 +0000
+++ b/main.cpp	Sun Jul 24 21:55:29 2016 +0000
@@ -517,7 +517,7 @@
                 }
                 printf(YEL "Read back : %s" DEF "\r\n", &MySocketData[0]);
                 char myJsonResponse[512];
-                char stringToCharBuf[1501]; // WNC can return max of 1500
+                char stringToCharBuf[BUF_SIZE_FOR_N_MAX_SOCKREAD*MAX_WNC_SOCKREAD_PAYLOAD+1]; // WNC can return max of 1500 (per sockread)
                 strcpy(stringToCharBuf, MySocketData.c_str());
                 if (extract_JSON(stringToCharBuf, &myJsonResponse[0]))
                 {