2017-01-24 22:44:30 -07:00
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#include <Wire.h>
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#include <LiquidCrystal_I2C.h>
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#include <max6675.h>
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#include "Adafruit_MCP23017.h"
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2017-02-11 14:09:15 -07:00
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#include <ESP8266WiFi.h>
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#include <WiFiClient.h>
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#include <ESP8266WebServer.h>
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2017-02-24 17:48:44 -07:00
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/////////////////////////
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2017-02-11 14:09:15 -07:00
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///// USER SETTINGS /////
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2017-02-24 17:48:44 -07:00
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/////////////////////////
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2017-02-11 14:09:15 -07:00
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// WiFi Settings
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2017-02-24 17:48:44 -07:00
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const char *ssid = "KilnControlV1";
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const char *password = "thereisnospoon";
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// Temperature Offsets
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int t1off = 0;
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int t2off = 0;
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int t3off = 0;
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// Pinout
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int CLK0 = 13;
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int MISO0 = 12;
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int CS1 = 16;
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int CS2 = 14;
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int CS3 = 15;
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2017-01-24 22:44:30 -07:00
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2017-02-11 14:09:15 -07:00
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2017-02-24 17:48:44 -07:00
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//////////////////////////////
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///// END: USER SETTINGS /////
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//////////////////////////////
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// Thermocouple
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MAX6675 t1(CLK0, CS1, MISO0);
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MAX6675 t2(CLK0, CS2, MISO0);
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MAX6675 t3(CLK0, CS3, MISO0);
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int temp1, temp2, temp3;
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2017-02-24 17:48:44 -07:00
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// Control
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int onTemp = 70;
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int offTemp = 80;
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// Output
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LiquidCrystal_I2C lcd(0x3f, 20, 4);
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Adafruit_MCP23017 mcp;
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2017-02-24 17:48:44 -07:00
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//////////////////////
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///// WEB SERVER /////
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//////////////////////
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// WiFi
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ESP8266WebServer server(80);
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const String header = "<head><title>Kiln Controller V1</title></head>";
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const String navbar = "<table border=\"1\"><nav><tr><td><a href=\"/\">Home</a></td><td><a href=\"/temps\">Temperature Display</a></td><td><a href=\"/settings\">Settings</a></td><td><a href=\"/config\">Configuration</a></td></tr></nav></table>";
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void handleRoot() {
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server.send(200, "text/html",
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header + "<h1>Kiln Controller V1</h1>" + navbar
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);
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}
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void handleTemps() {
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server.send(200, "text/html",
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header + "<h1>Kiln Controller V1</h1><h2>Temperature Display</h2>" + navbar +
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"<br><img src=\"/tempgraph.svg\">"
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);
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}
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void handleSettings() {
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server.send(200, "text/html",
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header + "<h1>Kiln Controller V1</h1><h2>Settings</h2>" + navbar +
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"<form name=\"myform\" action=\"/settings\" method=\"post\">"
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"<br>" +
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"<button type=\"submit\">Submit</button>" +
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"</form>"
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);
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}
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void handleSettingsUpdate() {
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mcp.digitalWrite(1, HIGH);
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}
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void handleConfig() {
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server.send(200, "text/html",
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header + "<h1>Configuration</h1>" + navbar
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);
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}
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void handleNotFound() {
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String temp = "File Not Found\n\n";
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temp += "URI: ";
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temp += server.uri();
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temp += "\nMethod: ";
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temp += ( server.method() == HTTP_GET ) ? "GET" : "POST";
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temp += "\nArguments: ";
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temp += server.args();
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temp += "\n";
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for ( uint8_t i = 0; i < server.args(); i++ ) {
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temp += " " + server.argName ( i ) + ": " + server.arg ( i ) + "\n";
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}
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server.send ( 404, "text/plain", temp );
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}
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/////////////////
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2017-02-11 14:09:15 -07:00
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///// SETUP /////
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2017-02-24 17:48:44 -07:00
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/////////////////
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void setup() {
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// Onboard LED
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pinMode(2, OUTPUT);
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// I2C
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Wire.pins(4, 5);
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// LCD
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lcd.init();
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lcd.init();
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lcd.backlight();
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lcd.setCursor(0, 0);
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lcd.print("Initializing... ");
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// MCP23017 GPIO expander
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mcp.begin();
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mcp.pinMode(0, OUTPUT);
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mcp.pinMode(1, OUTPUT);
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mcp.pinMode(2, OUTPUT);
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mcp.pinMode(3, OUTPUT);
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mcp.pinMode(4, OUTPUT);
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mcp.digitalWrite(0, HIGH);
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mcp.digitalWrite(1, HIGH);
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mcp.digitalWrite(2, HIGH);
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mcp.digitalWrite(3, HIGH);
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delay(100);
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mcp.digitalWrite(0, LOW);
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mcp.digitalWrite(1, LOW);
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mcp.digitalWrite(2, LOW);
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mcp.digitalWrite(3, LOW);
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// Temperature Inital Values
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temp1 = 0;
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temp2 = 0;
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temp3 = 0;
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// Access Point Setup
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WiFi.softAP(ssid, password);
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IPAddress myIP = WiFi.softAPIP();
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server.on("/", handleRoot);
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server.on("/temps", handleTemps);
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server.on("/settings", HTTP_GET, handleSettings);
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server.on("/settings", HTTP_POST, handleSettingsUpdate);
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server.on("/config", handleConfig);
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server.on ("/tempgraph.svg", tempGraph);
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server.onNotFound(handleNotFound);
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server.begin();
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lcd.clear();
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lcd.setCursor(0, 0); lcd.print("SSID: "); lcd.print(ssid);
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lcd.setCursor(0, 1); lcd.print("PSWD: "); lcd.print(password);
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lcd.setCursor(0, 2); lcd.print("IP : "); lcd.print(myIP);
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delay(2000);
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// Clear LCD
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lcd.setCursor(0, 0);
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lcd.clear();
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}
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void loop() {
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server.handleClient();
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// Get values
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int ntemp1 = t1.readFahrenheit() + t1off;
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int ntemp2 = t2.readFahrenheit() + t2off;
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int ntemp3 = t3.readFahrenheit() + t3off;
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temp1 = (ntemp1 != 2147483647 ? ntemp1 : temp1);
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temp2 = (ntemp2 != 2147483647 ? ntemp2 : temp2);
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temp3 = (ntemp3 != 2147483647 ? ntemp3 : temp3);
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// Write to LCD
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lcd.clear();
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lcd.setCursor(0, 0);
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lcd.printf("1:%4d%cF", temp1, 0xDF);
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lcd.setCursor(0, 1);
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lcd.printf("2:%4d%cF", temp2, 0xDF);
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lcd.setCursor(0, 2);
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lcd.printf("3:%4d%cF", temp3, 0xDF);
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// Heartbeat LED
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if (WiFi.softAPgetStationNum() == 0) {
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digitalWrite(2, LOW);
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delay(10);
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digitalWrite(2, HIGH);
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delay(990);
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} else {
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digitalWrite(2, LOW);
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delay(5);
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digitalWrite(2, HIGH);
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delay(100);
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digitalWrite(2, LOW);
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delay(1);
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digitalWrite(2, HIGH);
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delay(980);
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}
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}
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////////////////////
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///// PLOTTING /////
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////////////////////
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/**
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x[] is x values
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y[] is y values corresponding to x values
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len is the length of both x and y
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*/
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void drawGraph(int x[], int y[], int len) {
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String out = "";
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char temp[100];
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// Find max/min x,y values
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int maxY = y[0];
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int minY = y[0];
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for (int i = 1; i < len; i++) {
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if (y[i] > maxY) {
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maxY = y[i];
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} else if (y[i] < minY) {
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minY = y[i];
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}
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}
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int maxX = x[0];
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int minX = x[0];
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for (int i = 1; i < len; i++) {
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if (x[i] > maxX) {
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maxX = x[i];
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} else if (x[i] < minX) {
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minY = x[i];
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}
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}
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float yscale = 92.0 / (maxY - minY);
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float xscale = 484.0 / (maxX - minX);
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// Chart area
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out += "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" width=\"560\" height=\"195\">\n";
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out += "<rect width=\"560\" height=\"195\" style=\"fill:rgb(232,240,255);stroke-width:2;stroke:rgb(0,0,0)\"/>\n";
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out += "<rect x=\"50\" y=\"10\" width=\"500\" height=\"110\" style=\"fill:white;stroke-width:1;stroke:rgb(0,0,0)\"/>";
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// Vertical axis labels
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out += "<text x=\"10\" y=\"66\" fill=\"black\">F</text>";
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sprintf(temp, "<text x=\"10\" y=\"25\" fill=\"black\">%d</text>", maxY);
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out += temp;
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sprintf(temp, "<text x=\"10\" y=\"117\" fill=\"black\">%d</text>", minY);
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out += temp;
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out += "<line x1=\"45\" y1=\"19\" x2=\"55\" y2=\"19\" style=\"stroke:black;stroke-width:1\"></line>";
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out += "<line x1=\"45\" y1=\"111\" x2=\"55\" y2=\"111\" style=\"stroke:black;stroke-width:1\"></line>";
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// Horizontal axis labels
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int horizLabelSpacing = (maxX - minX) / 4;
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out += "<text x=\"275\" y=\"185\" fill=\"black\">HH:MM</text>";
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sprintf(temp, "<text x=\"53\" y=\"130\" fill=\"black\" transform=\"rotate(90 53,130)\">%02d:%02d </text>", minX / 60, minX % 60);
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out += temp;
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sprintf(temp, "<text x=\"174\" y=\"130\" fill=\"black\" transform=\"rotate(90 174,130)\">%02d:%02d </text>", (1 * horizLabelSpacing + minX) / 60, (1 * horizLabelSpacing + minX) % 60);
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out += temp;
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sprintf(temp, "<text x=\"295\" y=\"130\" fill=\"black\" transform=\"rotate(90 295,130)\">%02d:%02d </text>", (2 * horizLabelSpacing + minX) / 60, (2 * horizLabelSpacing + minX) % 60);
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out += temp;
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sprintf(temp, "<text x=\"416\" y=\"130\" fill=\"black\" transform=\"rotate(90 416,130)\">%02d:%02d </text>", (3 * horizLabelSpacing + minX) / 60, (3 * horizLabelSpacing + minX) % 60);
|
2017-02-11 15:26:22 -07:00
|
|
|
out += temp;
|
2017-02-24 17:48:44 -07:00
|
|
|
sprintf(temp, "<text x=\"535\" y=\"130\" fill=\"black\" transform=\"rotate(90 535,130)\">%02d:%02d </text>", maxX / 60, maxX % 60);
|
|
|
|
|
out += temp;
|
|
|
|
|
out += "<line x1=\"58\" y1=\"115\" x2=\"58\" y2=\"125\" style=\"stroke:black;stroke-width:1\"></line>";
|
|
|
|
|
out += "<line x1=\"179\" y1=\"115\" x2=\"179\" y2=\"125\" style=\"stroke:black;stroke-width:1\"></line>";
|
|
|
|
|
out += "<line x1=\"300\" y1=\"115\" x2=\"300\" y2=\"125\" style=\"stroke:black;stroke-width:1\"></line>";
|
|
|
|
|
out += "<line x1=\"421\" y1=\"115\" x2=\"421\" y2=\"125\" style=\"stroke:black;stroke-width:1\"></line>";
|
|
|
|
|
out += "<line x1=\"540\" y1=\"115\" x2=\"540\" y2=\"125\" style=\"stroke:black;stroke-width:1\"></line>";
|
|
|
|
|
out += "Sorry, your browser does not support inline SVG.";
|
|
|
|
|
|
2017-02-11 15:26:22 -07:00
|
|
|
|
2017-02-24 17:48:44 -07:00
|
|
|
// Plot polyline
|
2017-02-11 15:26:22 -07:00
|
|
|
out += "<g stroke=\"black\">\n";
|
2017-02-24 17:48:44 -07:00
|
|
|
out += "<polyline points=\"";
|
|
|
|
|
for (int i = 0; i < len; i++) {
|
|
|
|
|
sprintf(temp, "%d,%d ", (int)(58 + (xscale * (x[i] - minX))), (int)(111 - (yscale * (y[i] - minY))));
|
|
|
|
|
out += temp;
|
|
|
|
|
}
|
|
|
|
|
out += "\" style=\"fill:none;stroke:black;stroke-width:2\" />";
|
2017-02-11 15:26:22 -07:00
|
|
|
out += "</g>\n</svg>\n";
|
|
|
|
|
|
2017-02-24 17:48:44 -07:00
|
|
|
|
2017-02-11 15:26:22 -07:00
|
|
|
server.send ( 200, "image/svg+xml", out);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void tempGraph() {
|
2017-02-24 17:48:44 -07:00
|
|
|
lcd.clear();
|
|
|
|
|
int times[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100};
|
|
|
|
|
int temps[] = {70, 75, 81, 86, 90, 94, 97, 100, 103, 107,
|
|
|
|
|
110, 113, 116, 130, 146, 160, 173, 186, 194, 205,
|
|
|
|
|
220, 240, 255, 268, 282, 300, 300, 336, 335
|
|
|
|
|
};
|
|
|
|
|
drawGraph(times, temps, 29);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
lcd.setCursor(0, 0);
|
|
|
|
|
for (int i = 0; i < 6; i++) {
|
|
|
|
|
lcd.print(times[i]);
|
|
|
|
|
lcd.print(" ");
|
|
|
|
|
}
|
|
|
|
|
lcd.setCursor(0, 1);
|
|
|
|
|
for (int i = 0; i < sizeof(times) / sizeof(int); i++) {
|
|
|
|
|
lcd.print(temps[i]);
|
|
|
|
|
lcd.print(" ");
|
|
|
|
|
}
|
2017-01-24 22:44:30 -07:00
|
|
|
}
|
