Wren Dougherty / Mbed 2 deprecated HW7Wren

Connections to Xively working; has 5 channels on Xively (axl_x, axl_y, axl_z, heater_status, temperature)

Dependencies:   C12832_lcd EthernetInterface LM75B MMA7660 NTPClient libxively mbed-rtos mbed

main.cpp@4:05986b9ea330, 2014-05-19 (annotated)

Committer:
wren301
Date:
Mon May 19 15:40:00 2014 +0000
Revision:
4:05986b9ea330
Parent:
3:3a48ed10d6fe
Child:
5:59ac8fb475f2
Child:
6:d5023e875887
HW5 for submission

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wren301 0:785d351db1ad 1 #include "mbed.h"
wren301 0:785d351db1ad 2 #include "EthernetInterface.h"
wren301 0:785d351db1ad 3 #include "NTPClient.h"
wren301 0:785d351db1ad 4 #include "C12832_lcd.h"
wren301 0:785d351db1ad 5 #include "LM75B.h"
wren301 0:785d351db1ad 6 #include "MMA7660.h"
wren301 3:3a48ed10d6fe 7 #include "Websocket.h"
wren301 0:785d351db1ad 8
wren301 0:785d351db1ad 9 #define PST_OFFSET 7*60*60
wren301 0:785d351db1ad 10
wren301 0:785d351db1ad 11 Ticker timer;
wren301 0:785d351db1ad 12 C12832_LCD lcd; //Graphics LCD
wren301 0:785d351db1ad 13 EthernetInterface eth; //Networking functions
wren301 0:785d351db1ad 14 NTPClient ntp; //NTP client
wren301 0:785d351db1ad 15 LM75B tmp(p28,p27);
wren301 2:cf992d90396e 16 float lowTemp = 74;
wren301 2:cf992d90396e 17 float highTemp = 86;
wren301 0:785d351db1ad 18 float temp;
wren301 0:785d351db1ad 19 int heaterOn = 0;
wren301 2:cf992d90396e 20 AnalogIn pot1(p20);
wren301 2:cf992d90396e 21 AnalogIn pot2(p19);
wren301 0:785d351db1ad 22 #define LOOP_DELAY_MS 100
wren301 0:785d351db1ad 23 //update time every 10 minutes
wren301 3:3a48ed10d6fe 24 #define UPDATE_TIME 60*1
wren301 3:3a48ed10d6fe 25 MMA7660 acc(p28, p27);// accelerometer
wren301 3:3a48ed10d6fe 26 int updateTimeFromServer = 1;
wren301 1:0d467ac74808 27
wren301 3:3a48ed10d6fe 28 void connectToTheInternet()
wren301 3:3a48ed10d6fe 29 {
wren301 0:785d351db1ad 30 eth.init(); //Init and use DHCP
wren301 0:785d351db1ad 31 wait(2);
wren301 0:785d351db1ad 32 lcd.cls();
wren301 0:785d351db1ad 33 lcd.printf("Getting IP Address\r\n");
wren301 2:cf992d90396e 34 printf("\n\rGetting IP Address\r\n");
wren301 0:785d351db1ad 35 if(eth.connect(60000)!=0) {
wren301 0:785d351db1ad 36 lcd.printf("DHCP error - No IP");
wren301 0:785d351db1ad 37 wait(10);
wren301 0:785d351db1ad 38 } else {
wren301 0:785d351db1ad 39 lcd.printf("IP is %s\n", eth.getIPAddress());
wren301 0:785d351db1ad 40 printf("IP is %s\n", eth.getIPAddress());
wren301 0:785d351db1ad 41 wait(2);
wren301 0:785d351db1ad 42 }
wren301 0:785d351db1ad 43 lcd.cls();
wren301 0:785d351db1ad 44 }
wren301 0:785d351db1ad 45
wren301 3:3a48ed10d6fe 46 void updateTimeRoutine()
wren301 3:3a48ed10d6fe 47 {
wren301 1:0d467ac74808 48 if (ntp.setTime("0.pool.ntp.org") == 0) {
wren301 1:0d467ac74808 49 printf("Time updated!");
wren301 1:0d467ac74808 50 } else {
wren301 1:0d467ac74808 51 lcd.locate(0,0);
wren301 1:0d467ac74808 52 printf("Time update failed \n\r");
wren301 1:0d467ac74808 53 lcd.printf("Time update failed");
wren301 1:0d467ac74808 54 }
wren301 1:0d467ac74808 55 updateTimeFromServer = 0;
wren301 1:0d467ac74808 56 }
wren301 1:0d467ac74808 57
wren301 3:3a48ed10d6fe 58 void updateTime()
wren301 3:3a48ed10d6fe 59 {
wren301 0:785d351db1ad 60 updateTimeFromServer = 1;
wren301 0:785d351db1ad 61 }
wren301 0:785d351db1ad 62
wren301 3:3a48ed10d6fe 63 void sendTempJSON()
wren301 3:3a48ed10d6fe 64 {
wren301 3:3a48ed10d6fe 65 char json_str[100];
wren301 3:3a48ed10d6fe 66 // See the output on http://sockets.mbed.org/app-board/viewer
wren301 3:3a48ed10d6fe 67 Websocket ws("ws://sockets.mbed.org:443/ws/app-board/wo");
wren301 3:3a48ed10d6fe 68 ws.connect();
wren301 3:3a48ed10d6fe 69 // create json string with acc/tmp data
wren301 3:3a48ed10d6fe 70 sprintf(json_str, "{\"id\":\"app_board_eth_EW2013\",\"ax\":%d,\"ay\":%d,\"az\":%d, \"tmp\":%d}", (int)(acc.x()*360), (int)(acc.y()*360), (int)(acc.z()*360), (int)tmp.read());
wren301 3:3a48ed10d6fe 71 // send str
wren301 3:3a48ed10d6fe 72 ws.send(json_str);
wren301 3:3a48ed10d6fe 73 ws.close();
wren301 3:3a48ed10d6fe 74 }
wren301 3:3a48ed10d6fe 75
wren301 2:cf992d90396e 76 //POT values are 0:1, will allow high and low temperatures
wren301 2:cf992d90396e 77 //lets you set temp between 50 and 100 degrees
wren301 3:3a48ed10d6fe 78 void updateTempsFromPots()
wren301 3:3a48ed10d6fe 79 {
wren301 2:cf992d90396e 80 float lowTempPot = pot2*50.0+50;
wren301 2:cf992d90396e 81 float highTempPot = pot1*50.0+50;
wren301 2:cf992d90396e 82 //round to the nearest whole number
wren301 2:cf992d90396e 83 lowTempPot = floor(lowTempPot+.5);
wren301 2:cf992d90396e 84 highTempPot = floor(highTempPot+.5);
wren301 2:cf992d90396e 85 //high temp must be at least 1 degree above low temp
wren301 3:3a48ed10d6fe 86 if (highTempPot <= lowTempPot) {
wren301 3:3a48ed10d6fe 87 highTempPot = lowTempPot +1;
wren301 3:3a48ed10d6fe 88 }
wren301 2:cf992d90396e 89 //Refresh the display if the temps have changed by more than a degree
wren301 2:cf992d90396e 90 if ((lowTemp != lowTempPot) || (highTemp != highTempPot)) {
wren301 2:cf992d90396e 91 lowTemp = lowTempPot;
wren301 2:cf992d90396e 92 highTemp = highTempPot;
wren301 2:cf992d90396e 93 lcd.locate(0,0);
wren301 2:cf992d90396e 94 lcd.printf("\n\r%.1f LOW: %.0f HIGH: %.0f", temp, lowTemp, highTemp);
wren301 2:cf992d90396e 95 printf("LOW: %.2f HIGH: %.2f\n\r", lowTemp, highTemp);
wren301 1:0d467ac74808 96 }
wren301 1:0d467ac74808 97 }
wren301 1:0d467ac74808 98
wren301 0:785d351db1ad 99 int main()
wren301 3:3a48ed10d6fe 100 {
wren301 3:3a48ed10d6fe 101 connectToTheInternet();
wren301 0:785d351db1ad 102 //Variable to hold the current minute so we only update the display when the minute changes
wren301 0:785d351db1ad 103 char currentMinute[2];
wren301 0:785d351db1ad 104 currentMinute[1] = 'a';
wren301 0:785d351db1ad 105 char minute[2];
wren301 3:3a48ed10d6fe 106
wren301 0:785d351db1ad 107 float currentTemp = -200;
wren301 3:3a48ed10d6fe 108 lcd.printf("Updating time...\r\n");
wren301 3:3a48ed10d6fe 109 printf("Updating time...\r\n");
wren301 0:785d351db1ad 110 if (ntp.setTime("0.pool.ntp.org") == 0) {
wren301 3:3a48ed10d6fe 111 printf("Set time successfully\r\n");
wren301 0:785d351db1ad 112 lcd.cls();
wren301 0:785d351db1ad 113 timer.attach(&updateTime, UPDATE_TIME);
wren301 0:785d351db1ad 114 lcd.printf("\n\r\n\rHEATER OFF");
wren301 3:3a48ed10d6fe 115
wren301 3:3a48ed10d6fe 116 while(1) {
wren301 0:785d351db1ad 117 if(updateTimeFromServer) {
wren301 3:3a48ed10d6fe 118 updateTimeRoutine();
wren301 3:3a48ed10d6fe 119 }
wren301 2:cf992d90396e 120 //Sets temp from POTs
wren301 3:3a48ed10d6fe 121 updateTempsFromPots();
wren301 3:3a48ed10d6fe 122 //Fetch the time
wren301 1:0d467ac74808 123 time_t ctTime;
wren301 0:785d351db1ad 124 ctTime = time(NULL)- PST_OFFSET;
wren301 3:3a48ed10d6fe 125 char timeBuffer[32];
wren301 3:3a48ed10d6fe 126
wren301 0:785d351db1ad 127 //See if the minute has changed; set an update display flag if it has
wren301 3:3a48ed10d6fe 128 strftime(minute, 8, "%M", localtime(&ctTime));
wren301 3:3a48ed10d6fe 129 if ( (minute[1] != currentMinute[1]) ) {
wren301 0:785d351db1ad 130 //Formats the time for display
wren301 3:3a48ed10d6fe 131 strftime(timeBuffer, 32, "%a %b %d %I:%M%p\n\r", localtime(&ctTime));
wren301 0:785d351db1ad 132 printf("%s\r", timeBuffer);
wren301 0:785d351db1ad 133 lcd.locate(0,0);
wren301 0:785d351db1ad 134 lcd.printf("%s\r", timeBuffer);
wren301 0:785d351db1ad 135 currentMinute[1] = minute[1];
wren301 3:3a48ed10d6fe 136 }
wren301 3:3a48ed10d6fe 137
wren301 0:785d351db1ad 138 //Update the temperature display if the temperature, set temp has changed
wren301 3:3a48ed10d6fe 139 temp = tmp.read()*9.0/5.0 + 32.0;
wren301 3:3a48ed10d6fe 140
wren301 3:3a48ed10d6fe 141 //checks if the temperature (rounded to the nearest whole number) has changed
wren301 0:785d351db1ad 142 if (floor(temp+.5) != floor(currentTemp+.5)) {
wren301 2:cf992d90396e 143 printf("Temp change: %.1f F\n\r", temp);
wren301 0:785d351db1ad 144 currentTemp = temp;
wren301 0:785d351db1ad 145 lcd.locate(0,0);
wren301 4:05986b9ea330 146 //updates the temperature line of the display
wren301 2:cf992d90396e 147 lcd.printf("\n\r%.1f LOW: %.0f HIGH: %.0f", temp, lowTemp, highTemp);
wren301 3:3a48ed10d6fe 148 sendTempJSON();
wren301 3:3a48ed10d6fe 149 }
wren301 3:3a48ed10d6fe 150
wren301 3:3a48ed10d6fe 151 lcd.locate(0,0);
wren301 4:05986b9ea330 152
wren301 4:05986b9ea330 153 //Heater logic: turns off if it has gone over the high temp and is on,
wren301 4:05986b9ea330 154 //or if under the low temp and is off
wren301 2:cf992d90396e 155 if (heaterOn && (temp > highTemp) ) {
wren301 0:785d351db1ad 156 printf("Heater turned OFF\n\r");
wren301 3:3a48ed10d6fe 157 heaterOn = 0;
wren301 0:785d351db1ad 158 lcd.locate(0,0);
wren301 0:785d351db1ad 159 lcd.printf("\n\r\n\rHEATER OFF");
wren301 2:cf992d90396e 160 } else if (!heaterOn && (temp < lowTemp) ) {
wren301 0:785d351db1ad 161 printf("Heater turned ON\n\r");
wren301 0:785d351db1ad 162 heaterOn = 1;
wren301 0:785d351db1ad 163 lcd.locate(0,0);
wren301 0:785d351db1ad 164 lcd.printf("\n\r\n\rHEATER ON");
wren301 3:3a48ed10d6fe 165 }
wren301 3:3a48ed10d6fe 166 wait(LOOP_DELAY_MS*.001);
wren301 0:785d351db1ad 167 }
wren301 0:785d351db1ad 168 } else {
wren301 0:785d351db1ad 169 lcd.printf("NTP Error\r\n");
wren301 0:785d351db1ad 170 }
wren301 0:785d351db1ad 171 eth.disconnect();
wren301 0:785d351db1ad 172 }