Damien Frost
Example program to create IoT devices for a local network, which connect to a local server.
Dependencies: WebSocketClient WiflyInterface mbed messages
This code is used in the second part of my Internet of Things (IoT) blog post available here. The code is fairly simple, but its real value is in its reliability. I have worked hard to try to make the wireless connection as reliable, and as fast, as possible. There are a few lines of code that must be modified before it will work correctly, and those are described in the following Wiki pages.
It is designed to work with a Python WebSocket Server running on a PC, the source code of which is available here.
Once operating with the server, each microcontroller, or IoT device, will broadcast a counter and its internal temperature to your WebSocket Server.
Diff: source/globals.cpp
- Revision:
- 5:0c7d131e6089
- Parent:
- 3:f20e114eb2ee
- Child:
- 6:424e225d2a91
--- a/source/globals.cpp Tue Oct 04 16:52:21 2016 +0000
+++ b/source/globals.cpp Thu Oct 06 07:58:31 2016 +0000
@@ -1,9 +1,34 @@
-// ***************
-// * globals.cpp *
-// ***************
-//
-// Created: 2015/03/19
-// By: Damien Frost
+/**
+* @author Damien Frost
+*
+* @section LICENSE
+*
+* Copyright (c) 2016 Damien Frost
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+* THE SOFTWARE.
+*
+* @file "globals.cpp"
+*
+* @section DESCRIPTION
+* Global definitions for the IoT example program.
+*
+*/
#include "mbed.h"
#include "globals.h"
@@ -15,21 +40,23 @@
#define FUNCNAME "GBL"
#include "messages.h"
-char* wifissid = "SC";
-char* wifipassword = "smartcellshield";
-
+// Hardware declarations:
Serial pc(USBTX, USBRX);
InterruptIn UIBut1(USER_BUTTON);
Timer DisplayTimer;
DigitalOut Led(LED1);
-WiflyInterface eth(D8, D2, D6, D5, wifissid, wifipassword, WPA2);
-
+// Global variable declarations:
int ReconnectAttempts = 0;
int SendCounter = 0;
extern int IoT_ID = 0;
float TempSensor = 0.0f;
+char* wifissid = "MyHomeNetwork";
+char* wifipassword = "MyHomeNetworkPassword";
+// Wifily interface declaration:
+WiflyInterface eth(D8, D2, D6, D5, wifissid, wifipassword, WPA2);
+// WebSocket declaration:
Websocket ws;
@@ -129,7 +156,7 @@
return;
}
-void ReceiveNetworkData(unsigned int * wifi_cmd, unsigned int * var, float * value){
+void ReceiveNetworkData(unsigned int * wifi_cmd, float * value){
char msg_buffer[CHARMSGBUFF];
char msg_buffer2[CHARMSGBUFF];
int resp;
@@ -139,7 +166,7 @@
if(resp == 1){
INFO("Received: %s", msg_buffer);
sscanf(msg_buffer, "%d,%s", wifi_cmd, msg_buffer2);
- if(*wifi_cmd == CHANGEVAR_WIFI_CMD){
+ if(*wifi_cmd == CV_LED_WIFI_CMD){
// Get one more value:
sscanf(msg_buffer2, "%f", value);
}
@@ -149,7 +176,6 @@
}else{
//DBG("Did not receive anything :(\n\r");
*wifi_cmd = NO_WIFI_CMD;
- *var = 0;
*value = 0.0f;
}
}