Reshma Roy / Mbed 2 deprecated Lab_6

project

Dependencies:   mbed HTTPClient LM75B mbed-rtos EthernetInterface MMA7660

main.cpp@4:88613477855a, 2022-01-04 (annotated)

Committer:
rr387
Date:
Tue Jan 04 00:28:08 2022 +0000
Revision:
4:88613477855a
Parent:
3:e68b56ffa127 
Project

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rr387 3:e68b56ffa127 1 /* mbed Microcontroller Library
rr387 3:e68b56ffa127 2 * Copyright (c) 2019 ARM Limited
rr387 3:e68b56ffa127 3 * SPDX-License-Identifier: Apache-2.0
rr387 3:e68b56ffa127 4 */
rr387 3:e68b56ffa127 5 #include "mbed.h"
rr387 3:e68b56ffa127 6 #include "FP.h"//header file for function pointer
rr387 3:e68b56ffa127 7 #include "HTTPClient.h"
rr387 3:e68b56ffa127 8 #include "EthernetInterface.h"
rr387 3:e68b56ffa127 9
rr387 3:e68b56ffa127 10
rr387 3:e68b56ffa127 11 #define TRIGGER_HAND PTB18//setting trigger pin of ultrasonic sensor near hand
rr387 3:e68b56ffa127 12 #define ECHO_HAND PTB19//setting echo pin of ultrasonic sensor near hand
rr387 3:e68b56ffa127 13
rr387 3:e68b56ffa127 14 #define TRIGGER_BOTTLE PTC1//setting trigger pin of ultrasonic sensor inside bottle
rr387 3:e68b56ffa127 15 #define ECHO_BOTTLE PTC8//setting echo pin of ultrasonic sensor inside bottle
rr387 3:e68b56ffa127 16
rr387 3:e68b56ffa127 17 #define PUMP_SIGNAL PTC9//stting the signal pin of the relay pin connected to pump
rr387 3:e68b56ffa127 18
rr387 3:e68b56ffa127 19 #define BOTTLE_FULL 9//
rr387 3:e68b56ffa127 20 #define ON 1
rr387 3:e68b56ffa127 21 #define OFF 0
rr387 3:e68b56ffa127 22 Serial pc(USBTX, USBRX); //Create Serial interface
rr387 3:e68b56ffa127 23 DigitalOut RED(LED1, 1);//alert light when sanitizer is empty
rr387 3:e68b56ffa127 24 DigitalOut GREEN(LED2, 1);//user present station on
rr387 3:e68b56ffa127 25 DigitalOut BLUE(LED3, 1);//station free
rr387 3:e68b56ffa127 26 int hand_distance = 0;//variable to update feild 1 in thingsspeak
rr387 3:e68b56ffa127 27 int santizer_lev = 0;//variable to update feild 1 in thingsspeak
rr387 3:e68b56ffa127 28 long userCount = 0;//variable to update feild 1 in thingsspeak
rr387 3:e68b56ffa127 29
rr387 3:e68b56ffa127 30 //Ethernet Interface
rr387 3:e68b56ffa127 31 EthernetInterface eth;
rr387 3:e68b56ffa127 32 //HTTP Client for interfacing to web services
rr387 3:e68b56ffa127 33 HTTPClient http;
rr387 3:e68b56ffa127 34 #define IP "184.106.153.149" // thingspeak.com IP Address
rr387 3:e68b56ffa127 35
rr387 3:e68b56ffa127 36 char resp[1024];// response from http post
rr387 3:e68b56ffa127 37 int ret = 0;// error feed back from
rr387 3:e68b56ffa127 38
rr387 3:e68b56ffa127 39 HTTPText inText(resp, 1024);
rr387 3:e68b56ffa127 40
rr387 3:e68b56ffa127 41 void post_field1(){
rr387 3:e68b56ffa127 42 HTTPMap map;
rr387 3:e68b56ffa127 43 char buf[10];
rr387 3:e68b56ffa127 44 char buf1[10];
rr387 3:e68b56ffa127 45 sprintf(buf,"%d",userCount);//Convert UserCount to char*
rr387 3:e68b56ffa127 46 sprintf(buf1,"%d",santizer_lev);//Convert SanitizerLevel to char*
rr387 3:e68b56ffa127 47 map.put("api_key","JPZYYS7J18NX4XV5"); //Fill your thingspeak API KEY
rr387 3:e68b56ffa127 48 map.put("field1", buf); // Add UserCount to HTTPMap
rr387 3:e68b56ffa127 49 map.put("field2", buf1);// Add SanitizerLevel to HTTPMap
rr387 3:e68b56ffa127 50 pc.printf("\r\nPosting Data...");
rr387 3:e68b56ffa127 51 ret = http.post("https://api.thingspeak.com/update", map, &inText); //Publish Field1 and Field2 to Thingspeak
rr387 3:e68b56ffa127 52 if (!ret){
rr387 3:e68b56ffa127 53 pc.printf("\r\nPOST successfully - read %d characters", strlen(resp));
rr387 3:e68b56ffa127 54 pc.printf("\r\nResult: %s\n", resp);
rr387 3:e68b56ffa127 55 }else{
rr387 3:e68b56ffa127 56 pc.printf("\r\nError Connecting to ethernet port - ret = %d - HTTP return code = %d", ret, http.getHTTPResponseCode());
rr387 3:e68b56ffa127 57 }
rr387 3:e68b56ffa127 58 }
rr387 3:e68b56ffa127 59
rr387 3:e68b56ffa127 60 void set_red()//funtion to set red led
rr387 3:e68b56ffa127 61 {
rr387 3:e68b56ffa127 62 RED=0; GREEN = 1; BLUE = 1;
rr387 3:e68b56ffa127 63 }
rr387 3:e68b56ffa127 64 void set_green()//funtion to set green led
rr387 3:e68b56ffa127 65 {
rr387 3:e68b56ffa127 66 RED = 1; GREEN = 0; BLUE = 1;
rr387 3:e68b56ffa127 67 }
rr387 3:e68b56ffa127 68 void set_blue()//funtion to set blue led
rr387 3:e68b56ffa127 69 {
rr387 3:e68b56ffa127 70 RED = 1; GREEN = 1; BLUE = 0;
rr387 3:e68b56ffa127 71 }
rr387 3:e68b56ffa127 72
rr387 3:e68b56ffa127 73 class ultrasonic{
rr387 3:e68b56ffa127 74 private:
rr387 3:e68b56ffa127 75 DigitalOut trigger;//trigger pin for UltarSonic sensor
rr387 3:e68b56ffa127 76 InterruptIn echo; //Echo pin for water_level measurement. Uses as Interrupt to avoid code execution blocking.
rr387 3:e68b56ffa127 77 Ticker measure; //Ticker to trigger water_level measurement periodically.
rr387 3:e68b56ffa127 78 Timeout trigger_low; //Timeout interrupt to set trigger pin low after 10us of HIGH.
rr387 3:e68b56ffa127 79 Timer echoTimer; //Timer to get the time elapsed between echo sent and echo received back
rr387 3:e68b56ffa127 80 int echo_time_us;
rr387 3:e68b56ffa127 81 int meas_gap; //1sec
rr387 3:e68b56ffa127 82 volatile bool measuring;
rr387 3:e68b56ffa127 83 FP<void,int> fp;
rr387 3:e68b56ffa127 84
rr387 3:e68b56ffa127 85 void set_trigger_high(){ //Function to set Trigger Pin HIGH for 10us and set measuring = true
rr387 3:e68b56ffa127 86 measuring = true;
rr387 3:e68b56ffa127 87 trigger = ON;
rr387 3:e68b56ffa127 88 trigger_low.attach_us(this, &ultrasonic::set_trigger_low, 10); //set trigger pin OFF after 10us
rr387 3:e68b56ffa127 89 }
rr387 3:e68b56ffa127 90
rr387 3:e68b56ffa127 91 void set_trigger_low(void){ //Function to set trigger pin LOW to fiish trigger after 10us. This will be called by low timer object.
rr387 3:e68b56ffa127 92 trigger = OFF;
rr387 3:e68b56ffa127 93 }
rr387 3:e68b56ffa127 94
rr387 3:e68b56ffa127 95 void start_echo(void){//Function to start listening for echo back. This will start timer echoTimer. Will be based on Echo Pin RISE(or HIGH)
rr387 3:e68b56ffa127 96 if(!measuring) return; //avoid fluctuations on echo pin if any. Continue echo calculation only if measuring is TRUE.
rr387 3:e68b56ffa127 97 echoTimer.reset();
rr387 3:e68b56ffa127 98 echoTimer.start(); //Timer start since Echo pin is HIGH
rr387 3:e68b56ffa127 99 }
rr387 3:e68b56ffa127 100 void stop_echo(void){//Function to stop echoTimer after echo received back. Will be based on Echo Pin FALL(or LOW).
rr387 3:e68b56ffa127 101 if (!measuring)return; //avoid fluctuations on echo pin if any
rr387 3:e68b56ffa127 102 echoTimer.stop(); //stop timer since echo pin back to LOW
rr387 3:e68b56ffa127 103 echo_time_us = echoTimer.read_us(); //Calculate time for ultrasonic wave RTT.
rr387 3:e68b56ffa127 104 if(echo_time_us > 2000 || echo_time_us < 125)return; //ignore reading in case abnormally high or low RTT time
rr387 3:e68b56ffa127 105 measuring = false; //Marke measurement completed
rr387 3:e68b56ffa127 106 fp(echo_time_us / (29 * 2));
rr387 3:e68b56ffa127 107 }
rr387 3:e68b56ffa127 108 public:
rr387 3:e68b56ffa127 109 ultrasonic(PinName _trigger, PinName _echo, int _meas_gap):trigger(_trigger), echo(_echo){ //Constructor: initialize trigger(default value OFF) & echo pin
rr387 3:e68b56ffa127 110
rr387 3:e68b56ffa127 111 echo.rise(this, &ultrasonic::start_echo); //Attach function to Interrupt on Echo pin Rise
rr387 3:e68b56ffa127 112 echo.fall(this, &ultrasonic::stop_echo); //Attach function to Interrupt on Echo pin Fall
rr387 3:e68b56ffa127 113 meas_gap = _meas_gap;
rr387 3:e68b56ffa127 114 measuring = false;
rr387 3:e68b56ffa127 115 }
rr387 3:e68b56ffa127 116
rr387 3:e68b56ffa127 117 void start_measure(){ //function to Set Trigger Pin high repeatedly every 'time' seconds
rr387 3:e68b56ffa127 118 measure.attach(this, &ultrasonic::set_trigger_high,meas_gap);//ticker to trigger measurement with callback function
rr387 3:e68b56ffa127 119 }
rr387 3:e68b56ffa127 120 void stop_measure(void){ //Dettach from Ticker and stop measurements
rr387 3:e68b56ffa127 121 //signal = OFF;
rr387 3:e68b56ffa127 122 measuring = false;
rr387 3:e68b56ffa127 123 measure.detach();
rr387 3:e68b56ffa127 124 }
rr387 3:e68b56ffa127 125 void req_callBack(FP<void, int> _fp){
rr387 3:e68b56ffa127 126 fp = _fp;
rr387 3:e68b56ffa127 127 }
rr387 3:e68b56ffa127 128 };
rr387 3:e68b56ffa127 129
rr387 3:e68b56ffa127 130
rr387 3:e68b56ffa127 131 class _pump{
rr387 3:e68b56ffa127 132 private:
rr387 3:e68b56ffa127 133 DigitalOut signal; //pin for controlling relay
rr387 3:e68b56ffa127 134 const int pump_timeout = 400000;//the amount of sanitizer pumping into the hand
rr387 3:e68b56ffa127 135 Timeout time_out;//interrupt based timer
rr387 3:e68b56ffa127 136
rr387 3:e68b56ffa127 137 public:
rr387 3:e68b56ffa127 138 _pump(PinName _signal):signal(_signal,OFF){
rr387 3:e68b56ffa127 139 }
rr387 3:e68b56ffa127 140
rr387 3:e68b56ffa127 141 void switch_on(){//switch on the punp
rr387 3:e68b56ffa127 142 signal = ON;
rr387 3:e68b56ffa127 143 time_out.attach_us(this, &_pump::switch_off, pump_timeout); //set trigger pin OFF after 10us
rr387 3:e68b56ffa127 144 }
rr387 3:e68b56ffa127 145 void switch_off(){//switch off the pump
rr387 3:e68b56ffa127 146 signal = OFF;
rr387 3:e68b56ffa127 147 }
rr387 3:e68b56ffa127 148
rr387 3:e68b56ffa127 149 int get_state(){//return the signal state of pump
rr387 3:e68b56ffa127 150 return signal.read();
rr387 3:e68b56ffa127 151 }
rr387 3:e68b56ffa127 152 };
rr387 3:e68b56ffa127 153
rr387 3:e68b56ffa127 154 class _station{
rr387 3:e68b56ffa127 155 private:
rr387 3:e68b56ffa127 156 ultrasonic hand_sensor;
rr387 3:e68b56ffa127 157 ultrasonic bottle_sensor;
rr387 3:e68b56ffa127 158 _pump pump;
rr387 3:e68b56ffa127 159 FP<void,int> detect_hand_fp;//to find the user hand using function pointer detect hand fp
rr387 3:e68b56ffa127 160 FP<void,int> santizer_level_fp;//to find the level of sanitizer using this function
rr387 3:e68b56ffa127 161 const int threshold = 14;//the max value hand to be detected
rr387 3:e68b56ffa127 162 const int bottle_empty = 13;// the max value bottle level to get empty
rr387 3:e68b56ffa127 163 bool user_served;//variable to check the user served
rr387 3:e68b56ffa127 164 bool station_on;//varible to keep the sanitizing station on
rr387 3:e68b56ffa127 165 public:
rr387 3:e68b56ffa127 166 _station(PinName _trigger,PinName _echo, PinName __trigger,PinName __echo, PinName _signal):hand_sensor(_trigger, _echo, 1),bottle_sensor(__trigger, __echo, 10),pump(_signal){
rr387 3:e68b56ffa127 167
rr387 3:e68b56ffa127 168 bool user_served= false;//initialize user serve
rr387 3:e68b56ffa127 169 bool station_on = true;//initialize the station to start
rr387 3:e68b56ffa127 170 }
rr387 3:e68b56ffa127 171
rr387 3:e68b56ffa127 172 void start_station(){//This section the station will check the hand and bottle distance detection
rr387 3:e68b56ffa127 173 start_measure_bottle();//start to measure the bottle sanitizer level
rr387 3:e68b56ffa127 174 }
rr387 3:e68b56ffa127 175
rr387 3:e68b56ffa127 176 void start_detect_hand(){//start detecting the hand
rr387 3:e68b56ffa127 177 detect_hand_fp.attach(this, &_station::detect_hand);//attach the function pointer detect hand
rr387 3:e68b56ffa127 178 hand_sensor.req_callBack(detect_hand_fp);//pass function pointer to ultrasonic function
rr387 3:e68b56ffa127 179 hand_sensor.start_measure();//start hand sensor
rr387 3:e68b56ffa127 180 }
rr387 3:e68b56ffa127 181 void stop_detect_hand(){//stop detecting the hand
rr387 3:e68b56ffa127 182 hand_sensor.stop_measure();//stop ultrasonic sensor
rr387 3:e68b56ffa127 183 detect_hand_fp.detach();//detach the function pointer
rr387 3:e68b56ffa127 184 }
rr387 3:e68b56ffa127 185
rr387 3:e68b56ffa127 186 void start_measure_bottle(){//start measuring the level of sanitizer
rr387 3:e68b56ffa127 187 santizer_level_fp.attach(this, &_station::santizer_level);//attach the function pointer sanitizer level
rr387 3:e68b56ffa127 188 bottle_sensor.req_callBack(santizer_level_fp);//pass function pointer to ultrasonic function
rr387 3:e68b56ffa127 189 bottle_sensor.start_measure();//start calculating level of sanitizer
rr387 3:e68b56ffa127 190 }
rr387 3:e68b56ffa127 191 void stop_measure_bottle(){//stop measuring the level
rr387 3:e68b56ffa127 192 stop_detect_hand();//stop detecting hand
rr387 3:e68b56ffa127 193 bottle_sensor.stop_measure();//stop the ultrasonic sensor
rr387 3:e68b56ffa127 194 santizer_level_fp.detach();//detach the function pointer
rr387 3:e68b56ffa127 195 }
rr387 3:e68b56ffa127 196
rr387 3:e68b56ffa127 197 void santizer_level(int d){
rr387 3:e68b56ffa127 198 //int x = d - BOTTLE_FULL;
rr387 3:e68b56ffa127 199 //santizer_lev = BOTTLE_FULL - x;
rr387 3:e68b56ffa127 200 santizer_lev = d;
rr387 3:e68b56ffa127 201 char field[50];
rr387 3:e68b56ffa127 202 if (d <= bottle_empty){ //Bottle Empty
rr387 3:e68b56ffa127 203 set_red();//sanitizer empty red light alert
rr387 3:e68b56ffa127 204 station_on = false;//make the station off
rr387 3:e68b56ffa127 205 stop_detect_hand();//stop sensing the hand
rr387 3:e68b56ffa127 206 }
rr387 3:e68b56ffa127 207 if (d > bottle_empty){ //Bottle still have sanitizer
rr387 3:e68b56ffa127 208 set_blue();//sanitizer present and users are welcome
rr387 3:e68b56ffa127 209 if(!station_on){// if no user is using the station
rr387 3:e68b56ffa127 210 start_detect_hand();// start hand detection
rr387 3:e68b56ffa127 211 station_on = true;// on the station for pumping
rr387 3:e68b56ffa127 212 }
rr387 3:e68b56ffa127 213 }
rr387 3:e68b56ffa127 214 }
rr387 3:e68b56ffa127 215 void detect_hand(int d){//hand detection
rr387 3:e68b56ffa127 216 hand_distance = d;
rr387 3:e68b56ffa127 217 if (d <= threshold && user_served){ //hand Detected when user is served and the threshold is greater than the distance
rr387 3:e68b56ffa127 218 set_green();//green led glows when hand is detected
rr387 3:e68b56ffa127 219 pump.switch_on();//switch the pump on
rr387 3:e68b56ffa127 220 userCount++;//count the user number
rr387 3:e68b56ffa127 221 user_served= false;//stop the pumping after one pump of sanitizer
rr387 3:e68b56ffa127 222
rr387 3:e68b56ffa127 223 }
rr387 3:e68b56ffa127 224 if (d > threshold){ //hand not Detected
rr387 3:e68b56ffa127 225 set_blue();//station is free ready to serve user
rr387 3:e68b56ffa127 226 user_served= true;//start checking for the user
rr387 3:e68b56ffa127 227 }
rr387 3:e68b56ffa127 228 }
rr387 3:e68b56ffa127 229 };
rr387 3:e68b56ffa127 230
rr387 3:e68b56ffa127 231
rr387 3:e68b56ffa127 232
rr387 3:e68b56ffa127 233 int main()
rr387 3:e68b56ffa127 234 {
rr387 3:e68b56ffa127 235 int ret = 0;
rr387 3:e68b56ffa127 236 char field[50];
rr387 4:88613477855a 237 _station station(TRIGGER_HAND, ECHO_HAND, TRIGGER_BOTTLE, ECHO_BOTTLE, PUMP_SIGNAL);//initialize the station with sensor pins
rr387 4:88613477855a 238 station.start_station();//start the station
rr387 3:e68b56ffa127 239
rr387 4:88613477855a 240 eth.init(); //initialize ethernet port
rr387 4:88613477855a 241 ret= eth.connect();//connect the ethernet
rr387 3:e68b56ffa127 242
rr387 4:88613477855a 243 if (!ret){//check if ethernet connected successfully or not
rr387 3:e68b56ffa127 244 pc.printf("\r\nConnected, IP: %s, MASK: %s, GW: %s",
rr387 3:e68b56ffa127 245 eth.getIPAddress(), eth.getNetworkMask(), eth.getGateway());
rr387 3:e68b56ffa127 246 } else {
rr387 3:e68b56ffa127 247 pc.printf("\r\nError eth.connect() - ret = %d", ret);
rr387 3:e68b56ffa127 248 }
rr387 3:e68b56ffa127 249
rr387 3:e68b56ffa127 250
rr387 3:e68b56ffa127 251 while (true) {
rr387 3:e68b56ffa127 252 pc.printf("Hand Distance = %d\n\r", hand_distance);//print the hand distance calculated
rr387 3:e68b56ffa127 253 pc.printf("Sanitizer = %d\n\r", santizer_lev);//print the sanitizer level detected
rr387 3:e68b56ffa127 254 wait(5);
rr387 4:88613477855a 255 post_field1();//calling the post feild1 to post the information to thingspaek
rr387 3:e68b56ffa127 256
rr387 3:e68b56ffa127 257 }
rr387 3:e68b56ffa127 258 }
rr387 3:e68b56ffa127 259
rr387 3:e68b56ffa127 260
rr387 3:e68b56ffa127 261
rr387 3:e68b56ffa127 262