#include #include #include #include "Adafruit_MCP23017.h" #include #include #include ///////////////////////// ///// USER SETTINGS ///// ///////////////////////// // WiFi Settings const char *ssid = "KilnControlV1"; const char *password = "thereisnospoon"; // Temperature Offsets int t1off = 0; int t2off = 0; int t3off = 0; // Pinout int CLK0 = 13; int MISO0 = 12; int CS1 = 16; int CS2 = 14; int CS3 = 15; ////////////////////////////// ///// END: USER SETTINGS ///// ////////////////////////////// // Thermocouple MAX6675 t1(CLK0, CS1, MISO0); MAX6675 t2(CLK0, CS2, MISO0); MAX6675 t3(CLK0, CS3, MISO0); int temp1, temp2, temp3; // Control int onTemp = 70; int offTemp = 80; // Output LiquidCrystal_I2C lcd(0x3f, 20, 4); Adafruit_MCP23017 mcp; ////////////////////// ///// WEB SERVER ///// ////////////////////// // WiFi ESP8266WebServer server(80); const String header = "Kiln Controller V1"; const String navbar = "

"; void handleRoot() { server.send(200, "text/html", header + "

Kiln Controller V1

" + navbar ); } void handleTemps() { server.send(200, "text/html", header + "

Kiln Controller V1

Temperature Display

" + navbar + "

" ); } void handleSettings() { server.send(200, "text/html", header + "

Kiln Controller V1

Settings

" + navbar + "" ); } void handleSettingsUpdate() { mcp.digitalWrite(1, HIGH); } void handleConfig() { server.send(200, "text/html", header + "

Configuration

" + navbar ); } void handleNotFound() { String temp = "File Not Found\n\n"; temp += "URI: "; temp += server.uri(); temp += "\nMethod: "; temp += ( server.method() == HTTP_GET ) ? "GET" : "POST"; temp += "\nArguments: "; temp += server.args(); temp += "\n"; for ( uint8_t i = 0; i < server.args(); i++ ) { temp += " " + server.argName ( i ) + ": " + server.arg ( i ) + "\n"; } server.send ( 404, "text/plain", temp ); } ///////////////// ///// SETUP ///// ///////////////// void setup() { // Onboard LED pinMode(2, OUTPUT); // I2C Wire.pins(4, 5); // LCD lcd.init(); lcd.init(); lcd.backlight(); lcd.setCursor(0, 0); lcd.print("Initializing... "); // MCP23017 GPIO expander mcp.begin(); mcp.pinMode(0, OUTPUT); mcp.pinMode(1, OUTPUT); mcp.pinMode(2, OUTPUT); mcp.pinMode(3, OUTPUT); mcp.pinMode(4, OUTPUT); mcp.digitalWrite(0, HIGH); mcp.digitalWrite(1, HIGH); mcp.digitalWrite(2, HIGH); mcp.digitalWrite(3, HIGH); delay(100); mcp.digitalWrite(0, LOW); mcp.digitalWrite(1, LOW); mcp.digitalWrite(2, LOW); mcp.digitalWrite(3, LOW); // Temperature Inital Values temp1 = 0; temp2 = 0; temp3 = 0; // Access Point Setup WiFi.softAP(ssid, password); IPAddress myIP = WiFi.softAPIP(); server.on("/", handleRoot); server.on("/temps", handleTemps); server.on("/settings", HTTP_GET, handleSettings); server.on("/settings", HTTP_POST, handleSettingsUpdate); server.on("/config", handleConfig); server.on ("/tempgraph.svg", tempGraph); server.onNotFound(handleNotFound); server.begin(); lcd.clear(); lcd.setCursor(0, 0); lcd.print("SSID: "); lcd.print(ssid); lcd.setCursor(0, 1); lcd.print("PSWD: "); lcd.print(password); lcd.setCursor(0, 2); lcd.print("IP : "); lcd.print(myIP); delay(2000); // Clear LCD lcd.setCursor(0, 0); lcd.clear(); } void loop() { server.handleClient(); // Get values int ntemp1 = t1.readFahrenheit() + t1off; int ntemp2 = t2.readFahrenheit() + t2off; int ntemp3 = t3.readFahrenheit() + t3off; temp1 = (ntemp1 != 2147483647 ? ntemp1 : temp1); temp2 = (ntemp2 != 2147483647 ? ntemp2 : temp2); temp3 = (ntemp3 != 2147483647 ? ntemp3 : temp3); // Write to LCD lcd.clear(); lcd.setCursor(0, 0); lcd.printf("1:%4d%cF", temp1, 0xDF); lcd.setCursor(0, 1); lcd.printf("2:%4d%cF", temp2, 0xDF); lcd.setCursor(0, 2); lcd.printf("3:%4d%cF", temp3, 0xDF); // Heartbeat LED if (WiFi.softAPgetStationNum() == 0) { digitalWrite(2, LOW); delay(10); digitalWrite(2, HIGH); delay(990); } else { digitalWrite(2, LOW); delay(5); digitalWrite(2, HIGH); delay(100); digitalWrite(2, LOW); delay(1); digitalWrite(2, HIGH); delay(980); } } //////////////////// ///// PLOTTING ///// //////////////////// /** x[] is x values y[] is y values corresponding to x values len is the length of both x and y */ void drawGraph(int x[], int y[], int len) { String out = ""; char temp[100]; // Find max/min x,y values int maxY = y[0]; int minY = y[0]; for (int i = 1; i < len; i++) { if (y[i] > maxY) { maxY = y[i]; } else if (y[i] < minY) { minY = y[i]; } } int maxX = x[0]; int minX = x[0]; for (int i = 1; i < len; i++) { if (x[i] > maxX) { maxX = x[i]; } else if (x[i] < minX) { minY = x[i]; } } float yscale = 92.0 / (maxY - minY); float xscale = 484.0 / (maxX - minX); // Chart area out += "\n"; server.send ( 200, "image/svg+xml", out); } void tempGraph() { 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(" "); } }