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"}
Committer:
JMF
Date:
Sat Jul 30 16:26:22 2016 +0000
Revision:
60:2aa16fd02dfd
Child:
68:6e311c747045
added two files that are only used if you are building for ULINK output. Not yet included in the project build/link.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JMF 60:2aa16fd02dfd 1 //Used for ULINK output only
JMF 60:2aa16fd02dfd 2 //
JMF 60:2aa16fd02dfd 3
JMF 60:2aa16fd02dfd 4 /* ITM registers */
JMF 60:2aa16fd02dfd 5 #define ITM_PORT0_U8 (*((volatile unsigned int *)0xE0000000))
JMF 60:2aa16fd02dfd 6 #define ITM_PORT0_U32 (*((volatile unsigned long *)0xE0000000))
JMF 60:2aa16fd02dfd 7 #define ITM_TER (*((volatile unsigned long *)0xE0000E00))
JMF 60:2aa16fd02dfd 8 #define ITM_TCR (*((volatile unsigned long *)0xE0000E80))
JMF 60:2aa16fd02dfd 9
JMF 60:2aa16fd02dfd 10 #define ITM_TCR_ITMENA_Msk (1UL << 0)
JMF 60:2aa16fd02dfd 11
JMF 60:2aa16fd02dfd 12 /*!< Value identifying \ref ITM_RxBuffer is ready for next character. */
JMF 60:2aa16fd02dfd 13 #define ITM_RXBUFFER_EMPTY 0x5AA55AA5
JMF 60:2aa16fd02dfd 14
JMF 60:2aa16fd02dfd 15 /*!< Variable to receive characters. */
JMF 60:2aa16fd02dfd 16 extern
JMF 60:2aa16fd02dfd 17 volatile int ITM_RxBuffer;
JMF 60:2aa16fd02dfd 18 volatile int ITM_RxBuffer = ITM_RXBUFFER_EMPTY;
JMF 60:2aa16fd02dfd 19
JMF 60:2aa16fd02dfd 20 /** \brief ITM Send Character
JMF 60:2aa16fd02dfd 21
JMF 60:2aa16fd02dfd 22 The function transmits a character via the ITM channel 0, and
JMF 60:2aa16fd02dfd 23 \li Just returns when no debugger is connected that has booked the output.
JMF 60:2aa16fd02dfd 24 \li Is blocking when a debugger is connected, but the previous character
JMF 60:2aa16fd02dfd 25 sent has not been transmitted.
JMF 60:2aa16fd02dfd 26
JMF 60:2aa16fd02dfd 27 \param [in] ch Character to transmit.
JMF 60:2aa16fd02dfd 28
JMF 60:2aa16fd02dfd 29 \returns Character to transmit.
JMF 60:2aa16fd02dfd 30 */
JMF 60:2aa16fd02dfd 31 int ITM_putc (int ch) {
JMF 60:2aa16fd02dfd 32 if ((ITM_TCR & ITM_TCR_ITMENA_Msk) && /* ITM enabled */
JMF 60:2aa16fd02dfd 33 (ITM_TER & (1UL << 0) )) { /* ITM Port #0 enabled */
JMF 60:2aa16fd02dfd 34 while (ITM_PORT0_U32 == 0);
JMF 60:2aa16fd02dfd 35 ITM_PORT0_U8 = (int)ch;
JMF 60:2aa16fd02dfd 36 }
JMF 60:2aa16fd02dfd 37 return (ch);
JMF 60:2aa16fd02dfd 38 }
JMF 60:2aa16fd02dfd 39
JMF 60:2aa16fd02dfd 40 /** \brief ITM Receive Character
JMF 60:2aa16fd02dfd 41
JMF 60:2aa16fd02dfd 42 The function inputs a character via the external variable \ref ITM_RxBuffer.
JMF 60:2aa16fd02dfd 43 This variable is monitored and altered by the debugger to provide input.
JMF 60:2aa16fd02dfd 44
JMF 60:2aa16fd02dfd 45 \return Received character.
JMF 60:2aa16fd02dfd 46 \return -1 No character pending.
JMF 60:2aa16fd02dfd 47 */
JMF 60:2aa16fd02dfd 48 int ITM_getc (void) {
JMF 60:2aa16fd02dfd 49 int ch = -1; /* no character available */
JMF 60:2aa16fd02dfd 50
JMF 60:2aa16fd02dfd 51 if (ITM_RxBuffer != ITM_RXBUFFER_EMPTY) {
JMF 60:2aa16fd02dfd 52 ch = ITM_RxBuffer;
JMF 60:2aa16fd02dfd 53 ITM_RxBuffer = ITM_RXBUFFER_EMPTY; /* ready for next character */
JMF 60:2aa16fd02dfd 54 }
JMF 60:2aa16fd02dfd 55
JMF 60:2aa16fd02dfd 56 return (ch);
JMF 60:2aa16fd02dfd 57 }
JMF 60:2aa16fd02dfd 58
JMF 60:2aa16fd02dfd 59 /** \brief ITM send string
JMF 60:2aa16fd02dfd 60
JMF 60:2aa16fd02dfd 61 The function sends a null terminated string via the external variable \ref ITM_RxBuffer.
JMF 60:2aa16fd02dfd 62 This variable is monitored and altered by the debugger to provide input.
JMF 60:2aa16fd02dfd 63
JMF 60:2aa16fd02dfd 64 \return Received character.
JMF 60:2aa16fd02dfd 65 \return -1 No character pending.
JMF 60:2aa16fd02dfd 66 */
JMF 60:2aa16fd02dfd 67 int ITM_puts (char * str) {
JMF 60:2aa16fd02dfd 68 int i=0;
JMF 60:2aa16fd02dfd 69
JMF 60:2aa16fd02dfd 70 while(str[i])
JMF 60:2aa16fd02dfd 71 ITM_putc(str[i++]);
JMF 60:2aa16fd02dfd 72 return i;
JMF 60:2aa16fd02dfd 73 }
JMF 60:2aa16fd02dfd 74