Srdjan Veljkovic
Pubnub demo for AT&T IoT Starter Kit. Functionally similar to the Flow demo.
Dependencies: FXOS8700CQ MODSERIAL mbed
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"}
Revision 56:cb42ff383dab, committed 2016-07-28
- Comitter:
- stefanrousseau
- Date:
- Thu Jul 28 17:21:31 2016 +0000
- Parent:
- 55:3abf9e3f42e6
- Child:
- 57:d184175b6b03
- Commit message:
- Changes USB UART to use MODSERIAL library
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MODSERIAL.lib Thu Jul 28 17:21:31 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/Sissors/code/MODSERIAL/#d8422efe4761
--- a/hardware.h Thu Jul 28 15:52:37 2016 +0000 +++ b/hardware.h Thu Jul 28 17:21:31 2016 +0000 @@ -1,7 +1,8 @@ #ifndef Hardware_H_ #define Hardware_H_ +#include "MODSERIAL.h" extern I2C i2c; //SDA, SCL -- define the I2C pins being used -extern Serial pc; //UART to USB host +extern MODSERIAL pc; //UART to USB host //Un-comment the definition below if you want to use the USB rx for another purpose. //otherwise the USB rx will be used to receive virtual sensor data from Avnet's
--- a/main.cpp Thu Jul 28 15:52:37 2016 +0000 +++ b/main.cpp Thu Jul 28 17:21:31 2016 +0000 @@ -40,7 +40,9 @@ #define WNC_WAIT_FOR_AT_CMD_MS 40 -Serial pc(USBTX, USBRX); +//Serial pc(USBTX, USBRX); +MODSERIAL pc(USBTX, USBRX, 256, 256); // tx, rx with default tx, rx buffer sizes + SerialBuffered mdm(PTD3, PTD2, 4096); DigitalOut led_green(LED_GREEN); DigitalOut led_red(LED_RED);
--- a/sensors.cpp Thu Jul 28 15:52:37 2016 +0000
+++ b/sensors.cpp Thu Jul 28 17:21:31 2016 +0000
@@ -471,17 +471,22 @@
//}
} //ProcessUsbInterface()
-void pcrx_callback() //Rx interrupt for USB serial port
+// This function is called when a character goes into the RX buffer.
+void UsbUartRxCallback(MODSERIAL_IRQ_INFO *info)
{
- // Note: you need to actually read from the serial to clear the RX interrupt
- usb_uart_rx_buff[usb_uart_rx_buff_putptr++] = pc.getc();
+ // Get the pointer to our MODSERIAL object that invoked this callback.
+ MODSERIAL *pc = info->serial;
+ while (pc->readable())
+ {
+ usb_uart_rx_buff[usb_uart_rx_buff_putptr++] = pc->getcNb();
+ }
}
#endif
void sensors_init(void)
{
#ifdef USE_VIRTUAL_SENSORS
- pc.attach(&pcrx_callback);
+ pc.attach(&UsbUartRxCallback, MODSERIAL::RxIrq);
#endif
Init_Si7020();
Init_Si1145();