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.
headers/globals.h@8:5afd599875e4, 2016-11-24 (annotated)
- Committer:
- defrost
- Date:
- Thu Nov 24 16:54:56 2016 +0000
- Revision:
- 8:5afd599875e4
- Parent:
- 5:0c7d131e6089
- Updated messages.h to its own library
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| defrost | 5:0c7d131e6089 | 1 | /** |
| defrost | 5:0c7d131e6089 | 2 | * @author Damien Frost |
| defrost | 5:0c7d131e6089 | 3 | * |
| defrost | 5:0c7d131e6089 | 4 | * @section LICENSE |
| defrost | 5:0c7d131e6089 | 5 | * |
| defrost | 5:0c7d131e6089 | 6 | * Copyright (c) 2016 Damien Frost |
| defrost | 5:0c7d131e6089 | 7 | * |
| defrost | 5:0c7d131e6089 | 8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| defrost | 5:0c7d131e6089 | 9 | * of this software and associated documentation files (the "Software"), to deal |
| defrost | 5:0c7d131e6089 | 10 | * in the Software without restriction, including without limitation the rights |
| defrost | 5:0c7d131e6089 | 11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| defrost | 5:0c7d131e6089 | 12 | * copies of the Software, and to permit persons to whom the Software is |
| defrost | 5:0c7d131e6089 | 13 | * furnished to do so, subject to the following conditions: |
| defrost | 5:0c7d131e6089 | 14 | * |
| defrost | 5:0c7d131e6089 | 15 | * The above copyright notice and this permission notice shall be included in |
| defrost | 5:0c7d131e6089 | 16 | * all copies or substantial portions of the Software. |
| defrost | 5:0c7d131e6089 | 17 | * |
| defrost | 5:0c7d131e6089 | 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| defrost | 5:0c7d131e6089 | 19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| defrost | 5:0c7d131e6089 | 20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| defrost | 5:0c7d131e6089 | 21 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| defrost | 5:0c7d131e6089 | 22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| defrost | 5:0c7d131e6089 | 23 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| defrost | 5:0c7d131e6089 | 24 | * THE SOFTWARE. |
| defrost | 5:0c7d131e6089 | 25 | * |
| defrost | 5:0c7d131e6089 | 26 | * @file "globals.h" |
| defrost | 5:0c7d131e6089 | 27 | * |
| defrost | 5:0c7d131e6089 | 28 | * @section DESCRIPTION |
| defrost | 5:0c7d131e6089 | 29 | * Global definitions for the Internet of Things example. |
| defrost | 5:0c7d131e6089 | 30 | * |
| defrost | 5:0c7d131e6089 | 31 | */ |
| defrost | 1:4403f2ed1c1f | 32 | |
| defrost | 1:4403f2ed1c1f | 33 | #ifndef IQ_GLOBALS_H |
| defrost | 1:4403f2ed1c1f | 34 | #define IQ_GLOBALS_H |
| defrost | 1:4403f2ed1c1f | 35 | |
| defrost | 1:4403f2ed1c1f | 36 | #include "mbed.h" |
| defrost | 1:4403f2ed1c1f | 37 | #include "WiflyInterface.h" |
| defrost | 1:4403f2ed1c1f | 38 | #include "Commands.h" |
| defrost | 1:4403f2ed1c1f | 39 | #include "Websocket.h" |
| defrost | 1:4403f2ed1c1f | 40 | |
| defrost | 1:4403f2ed1c1f | 41 | |
| defrost | 1:4403f2ed1c1f | 42 | // Wifi Interface defines: |
| defrost | 1:4403f2ed1c1f | 43 | #define TCP_SERVER_PORT 4445 |
| defrost | 1:4403f2ed1c1f | 44 | #define WIFIBAUDRATE 115200 |
| defrost | 1:4403f2ed1c1f | 45 | #define WIFINETWORK 2 |
| defrost | 1:4403f2ed1c1f | 46 | #define CHARMSGBUFF 1024 |
| defrost | 1:4403f2ed1c1f | 47 | #define TIMEOUTRECEIVEATTEMPTS 5 |
| defrost | 1:4403f2ed1c1f | 48 | #define WS_PORT 4444 |
| defrost | 3:f20e114eb2ee | 49 | #define SERVER_IP "192.168.1.99" |
| defrost | 1:4403f2ed1c1f | 50 | |
| defrost | 5:0c7d131e6089 | 51 | // Hardware: |
| defrost | 1:4403f2ed1c1f | 52 | extern Serial pc; |
| defrost | 1:4403f2ed1c1f | 53 | extern InterruptIn UIBut1; |
| defrost | 1:4403f2ed1c1f | 54 | extern Timer DisplayTimer; |
| defrost | 2:7abdaa5a9209 | 55 | extern DigitalOut Led; |
| defrost | 1:4403f2ed1c1f | 56 | |
| defrost | 5:0c7d131e6089 | 57 | // Variables: |
| defrost | 1:4403f2ed1c1f | 58 | extern int ReconnectAttempts; |
| defrost | 1:4403f2ed1c1f | 59 | extern int SendCounter; |
| defrost | 1:4403f2ed1c1f | 60 | extern int IoT_ID; |
| defrost | 1:4403f2ed1c1f | 61 | extern float TempSensor; |
| defrost | 5:0c7d131e6089 | 62 | extern char* wifissid; |
| defrost | 5:0c7d131e6089 | 63 | extern char* wifipassword; |
| defrost | 1:4403f2ed1c1f | 64 | |
| defrost | 5:0c7d131e6089 | 65 | // Communication: |
| defrost | 5:0c7d131e6089 | 66 | extern WiflyInterface eth; |
| defrost | 1:4403f2ed1c1f | 67 | extern Websocket ws; |
| defrost | 1:4403f2ed1c1f | 68 | |
| defrost | 1:4403f2ed1c1f | 69 | // Functions: |
| defrost | 1:4403f2ed1c1f | 70 | void SensorToPu(float gain, float offset, int sensor, float* result); |
| defrost | 1:4403f2ed1c1f | 71 | void InitializeStruct(struct tf_history_t* toClear); |
| defrost | 1:4403f2ed1c1f | 72 | void SetupVar(void); |
| defrost | 1:4403f2ed1c1f | 73 | void SetButtonEvent(void); |
| defrost | 1:4403f2ed1c1f | 74 | void rt_OneStep(void); |
| defrost | 1:4403f2ed1c1f | 75 | void DisplayInputs(float CPS); |
| defrost | 1:4403f2ed1c1f | 76 | void SetSCKDCParams(bool enable, float gain); |
| defrost | 1:4403f2ed1c1f | 77 | int SetupNetwork(int Tries); |
| defrost | 1:4403f2ed1c1f | 78 | bool ConnectToServer(int Tries); |
| defrost | 1:4403f2ed1c1f | 79 | void SendNetworkData(void); |
| defrost | 5:0c7d131e6089 | 80 | void ReceiveNetworkData(unsigned int * wifi_cmd, float * value); |
| defrost | 1:4403f2ed1c1f | 81 | void ModifyVariable(unsigned int wifi_var, float wifi_data); |
| defrost | 1:4403f2ed1c1f | 82 | |
| defrost | 1:4403f2ed1c1f | 83 | |
| defrost | 1:4403f2ed1c1f | 84 | #endif /* IQ_GLOBALS_H */ |
| defrost | 1:4403f2ed1c1f | 85 |