Homework_5_IOT
Dependencies: C12832_lcd EthernetInterface LCD_fonts LM75B MMA7660 NTPClient SimpleSMTPClient WebSocketClient mbed-rtos mbed
Diff: main.cpp
- Revision:
- 0:40afd0d80b51
diff -r 000000000000 -r 40afd0d80b51 main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Tue May 20 06:18:16 2014 +0000 @@ -0,0 +1,245 @@ +/*******************************************************/ +/* IMPLEMENT THE THERMOSTAT */ +/*System turned ON/OFF using joystick or Accelerometer */ +/*Temperature Set using Joystick */ +/*System Status and heater state shown on LED */ +/*LCD displays: Time. */ +/* If system is ON current and set low */ +/* and High Temperature */ +/* Heater/Cooler ON */ +/* If system is OFF SYSTEM OFF */ +/*The timing, current temperature, accelerometer reading*/ +/*are sent periodically to websockets.org/bhakti */ +/*The duration after which the information is sent is */ +/*defined by macro SECONDS which is currently set to 10*/ +/*******************************************************/ + +#include "mbed.h" +#include "C12832_lcd.h" +#include "LM75B.h" +#include "DebouncedIn.h" +#include "MMA7660.h" +#include "EthernetInterface.h" +#include "NTPClient.h" +#include "SimpleSMTPClient.h" +#include "Small_6.h" +#include "Websocket.h" + +#define hys 3 +#define HEATER 0 +#define COOLER 1 +#define No_HEAT_COOL 2 +#define SEND 1 +#define DO_NOT_SEND 0 +#define SECONDS 10 + +DebouncedIn reset(p14); +C12832_LCD lcd; +LM75B current(p28,p27); +MMA7660 MMA(p28, p27); +Serial pc(USBTX,USBRX); +AnalogIn max_temp(p19); +AnalogIn min_temp(p20); + +//System ON/OFF +BusIn heat_on (p16,p13); + +//System ON/OFF LED +DigitalOut thermostat (LED1); + +//Heater/Cooler ON/OFF LED. This can be furthur connected to the relay +DigitalOut heater (LED2); +DigitalOut cooler (LED3); + +Ticker check_move; +Ticker Send_info; + +bool no_move; //This variable is set if no movement is detected +float acc_x = MMA.x(); +float acc_y = MMA.y(); +float acc_z = MMA.z(); +float acc_x_old,acc_y_old,acc_z_old; +int heat_cool; //1: Heater ON , 0:Cooler ON , 2: Heater and Cooler OFF +bool send_info; //This variable is used to define when the information is + //to be sent to the web. + +/****************************************************************************/ +/*Function name: check: This function is used to detect motion around the */ +/*thermostat.It sets the variable no move if the previous and current */ +/*value of the accelerometer value is same. Accelerometer value unchanged */ +/*indicates that there is no motion around the thermostat */ +/****************************************************************************/ +void check() +{ + acc_x_old = acc_x; + acc_y_old = acc_y; + acc_z_old = acc_z; + acc_x = MMA.x(); + acc_y = MMA.y(); + acc_z = MMA.z(); + if (acc_x_old == acc_x && acc_y_old == acc_y && acc_z_old == acc_z) + { + no_move = 1; + } + else + no_move = 0; + +} +/******************************************************************************/ + +/******************************************************************************/ +/*Function name: send_ws() */ +/*This function is used to set a boolean variable to SEND so that the */ +/*information can be sent over the web. The variable is set to SEND after no. */ +/*of seconds defined by SECONDS(currently 10sec) */ +/******************************************************************************/ +void send_ws() +{ + send_info = SEND; +} + +/*******************************************************************************/ + +int main() +{ + int ret_msg,ret_msg2,ret_curr_time,eth_ret,ws_ret; + EthernetInterface eth; + lcd.cls(); + pc.printf("\n\n/* SimpleMTPClient library demonstration \n"); + + pc.printf("Setting up ...\n"); + eth.init(); + eth_ret = eth.connect(); + if (eth_ret != 0) + { + lcd.cls(); + lcd.printf("Ethernet not connected"); + return -1; + } + pc.printf("Connected OK\n"); + + // IP Address + pc.printf("IP Address is %s\n", eth.getIPAddress()); + lcd.locate(0,1); + lcd.printf("%s", eth.getIPAddress()); + wait(2); + + + NTPClient ntp; + ntp.setTime("time.nist.gov"); + lcd.cls(); + + Websocket ws("ws://sockets.mbed.org:443/ws/bhakti/rw"); + ws_ret = ws.connect(); + if (!ws_ret) + { + lcd.cls(); + lcd.printf("Nor connected to URL"); + return -1; + } + + /*Messages to be sent over the web*/ + char msg[100]; + char msg2[100]; + char curr_time[100]; + + float min_set; + float max_set; + + //This variable is used to check if the system is ON or OFF + bool status=0; + + time_t ctTime; + lcd.cls(); + check_move.attach(&check,120.0); + Send_info.attach(&send_ws,SECONDS); + while (1) { + sprintf(msg,"Temperature is %0.2f",current.read()); + sprintf(msg2,"Accelerometer readings are X= %0.2f,Y= %0.2f, Z= %0.2f",MMA.x(),MMA.y(),MMA.z()); + sprintf(curr_time,"Time: %s",ctime(&ctTime)); + if (send_info == SEND) { + ret_msg2 = ws.send(msg2); + ret_msg = ws.send(msg); + ret_curr_time=ws.send(curr_time); + if (ret_msg == -1 || ret_msg2 == -1 || ret_curr_time == -1) + { + lcd.cls(); + lcd.printf("One of the messages not sent"); + } + send_info = DO_NOT_SEND; + } + min_set = min_temp.read() * 50; //scale the pot value from 0 to 1 -> 0 to 50 + max_set = max_temp.read() * 50; + ctTime = time(NULL) - 25200; //Adjust time as per local time + lcd.set_font((unsigned char*) Small_6); //set LCD font + lcd.locate(1,1); + lcd.printf("%s",ctime(&ctTime)); + lcd.locate(1,8); + + /*If system is ON print current and set temperature*/ + /*Else print LCD OFF on LCD*/ + + if (status) { + lcd.printf("Curr:%.2f",current.read()); + lcd.locate(1,16); + lcd.printf("MAX:%0.2f, MIN:%0.2f",max_set,min_set); + lcd.locate(1,24); + switch (heat_cool) { + case HEATER : lcd.printf("Heater ON "); + break; + case COOLER : lcd.printf("Cooler ON "); + break; + case No_HEAT_COOL : lcd.printf("Heat/Cool OFF"); + break; + } + + } else { + lcd.locate(1,10); + lcd.printf("System OFF"); + wait (0.1); + } + + /*If system is turned ON: Joystick is pushed towards edge of LCD + OR movement is detected + Turn System ON LED on: LED1 and Set the status variable to 1 + Else if system is turned OFF by user turn OFF the system status LED + and the LED that is connected to the relay*/ + + if (heat_on == 0x2 || !no_move) + { + thermostat = 1; + status = 1; + } else if (heat_on == 0x1 || no_move) { + lcd.cls(); + thermostat = 0; + heater = 0; + status = 0; + } + + //Comparison logic and turn Heater/Cooler ON/OFF + if ((min_set > (current.read()+ hys)) && thermostat == 1) { + heater = 1; + cooler = 0; + status = 1; + heat_cool = HEATER; + } + else if ((max_set < (current.read()-hys)) && thermostat == 1) { + cooler = 1; + heater = 0; + status = 1; + heat_cool = COOLER; + } + else if (!thermostat) { + heater = 0; + cooler = 0; + status = 0; + } + else { + heater = 0; + cooler = 0; + status = 1; + heat_cool = No_HEAT_COOL; + } + + } +}