justindarc/esp8266-ap-flyweb-temperature-server.ino

## esp8266-ap-flyweb-temperature-server.ino
// Install ESP8266 Board v2.1.0 by adding this
// to the "Additional Board Manager URLs" in
// "Preferences..." and then select it for
// installation via "Boards Manager..." under
// the "Tools" -> "Board: XXX" menu.
// http://arduino.esp8266.com/stable/package_esp8266com_index.json
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>

// OneWire v2.3.2 (Install via "Manage Libraries...")
#include <OneWire.h>

// DallasTemperature v3.7.6 (Install via "Manage Libraries...")
#include <DallasTemperature.h>

// NOTES:
// * Use 74880 baud rate in "Serial Monitor"
//   to view logger info.
// * Select 921600 baud rate under the
//   "Tools" -> "Upload Speed: XXX" menu for
//   faster flash programming (tested and
//   works fine with "SparkFun Thing Dev").

// Pin definitions
const int ONE_WIRE_BUS = 0; // OneWire bus
const int DISCOVER_PIN = 2; // Button for toggling discovery
const int LED_PIN = 5; // Thing's onboard, green LED

const int MIN_DEBOUNCE_COUNT = 10;

// Debounce variables
bool discoveryMode = false;
int discoverValue = LOW;
int discoverCount = 0;
int discoverLastValue;
long discoverLastTime = 0;

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

ESP8266WebServer server(80);

String selectedSSID = "";
String selectedKey = "";

String getDeviceName() {
  uint8_t mac[WL_MAC_ADDR_LENGTH];
  WiFi.softAPmacAddress(mac);
  String macID = String(mac[WL_MAC_ADDR_LENGTH - 2], HEX) +
                 String(mac[WL_MAC_ADDR_LENGTH - 1], HEX);
  macID.toUpperCase();

  return "TemperatureSensor-" + macID;
}

void startAccessPoint() {
  discoveryMode = true;

  Serial.println("DISCOVERY MODE");
  digitalWrite(LED_PIN, LOW);

  WiFi.disconnect();
  delay(4000);
  WiFi.mode(WIFI_AP);

  String AP_NameString = getDeviceName();

  char AP_NameChar[AP_NameString.length() + 1];
  memset(AP_NameChar, 0, AP_NameString.length() + 1);

  for (int i=0; i<AP_NameString.length(); i++)
    AP_NameChar[i] = AP_NameString.charAt(i);

  WiFi.softAP(AP_NameChar);

  IPAddress ipAddress = WiFi.softAPIP();

  Serial.println("Access point: " + AP_NameString);
  Serial.println("IP address: " + ipAddress.toString());
}

void stopAccessPoint() {
  discoveryMode = false;

  Serial.println("TEMPERATURE MODE");
  digitalWrite(LED_PIN, HIGH);

  WiFi.softAPdisconnect();
  delay(4000);
  WiFi.mode(WIFI_STA);

  WiFi.begin(selectedSSID.c_str(), selectedKey.c_str());

  Serial.print("Connecting to: " + selectedSSID);

  while (WiFi.status() != WL_CONNECTED && !discoveryMode) {
    delay(500);
    Serial.print(".");
  }

  IPAddress ipAddress = WiFi.localIP();

  Serial.println("");
  Serial.println("IP address: " + ipAddress.toString());

  MDNS.begin(getDeviceName().c_str(), ipAddress);
  MDNS.addService("http", "tcp", 80);
}

void loop() {
  if (millis() != discoverLastTime) {
    discoverLastValue = digitalRead(DISCOVER_PIN);

    if (discoverLastValue == discoverValue && discoverCount > 0) {
      discoverCount--;
    }

    if (discoverLastValue != discoverValue) {
      discoverCount++;
    }

    if (discoverCount >= MIN_DEBOUNCE_COUNT) {
      discoverCount = 0;
      discoverValue = discoverLastValue;

      if (discoverValue == LOW) {
        if (discoveryMode) {
          stopAccessPoint();
        }

        else {
          startAccessPoint();
        }
      }
    }

    discoverLastTime = millis();
  }

  server.handleClient();
}

void handleIndex_temperature() {
  String s = "";

  // Read the temperature from the OneWire bus.
  sensors.requestTemperatures();

  float tempC = sensors.getTempCByIndex(0);
  float tempF = DallasTemperature::toFahrenheit(tempC);
  char buffer[10];
  String tempString = dtostrf(tempF, 4, 1, buffer);

  s += "<!DOCTYPE html>\r\n";
  s += "<html>\r\n";
  s += "<head>\r\n";
  s +=   "<title>ESP8266 Temperature Monitor</title>\r\n";
  s +=   "<meta name=\"viewport\" content=\"width=device-width,user-scalable=no,initial-scale=1\">\r\n";
  s +=   "<meta http-equiv=\"refresh\" content=\"5\">\r\n";
  s += "</head>\r\n";
  s += "<body>\r\n";
  s +=   "<h1>Temperature: " + tempString + "</h1>\r\n";
  s += "</body>\r\n";
  s += "</html>\r\n";

  server.send(200, "text/html", s);
}

void handleIndex_connecting() {
  String s = "";

  s += "<!DOCTYPE html>\r\n";
  s += "<html>\r\n";
  s += "<head>\r\n";
  s +=   "<title>ESP8266 Temperature Monitor</title>\r\n";
  s +=   "<meta name=\"viewport\" content=\"width=device-width,user-scalable=no,initial-scale=1\">\r\n";
  s += "</head>\r\n";
  s += "<body>\r\n";
  s +=   "<h1>Network settings saved! Restarting...</h1>\r\n";
  s += "</body>\r\n";
  s += "</html>\r\n";

  server.send(200, "text/html", s);
}

void handleIndex_discovery() {
  String s = "";

  if (server.method() == HTTP_POST) {
    selectedSSID = server.arg("ssid");
    selectedKey = server.arg("key");

    handleIndex_connecting();
    stopAccessPoint();
  }

  s += "<!DOCTYPE html>\r\n";
  s += "<html>\r\n";
  s += "<head>\r\n";
  s +=   "<title>ESP8266 Temperature Monitor</title>\r\n";
  s +=   "<meta name=\"viewport\" content=\"width=device-width,user-scalable=no,initial-scale=1\">\r\n";
  s += "</head>\r\n";
  s += "<body>\r\n";
  s +=   "<h1>Select your network</h1>\r\n";
  s +=   "<form method=\"POST\" action=\"/\">\r\n";
  s +=     "<p>\r\n";
  s +=       "<label for=\"ssid\">SSID</label>\r\n";
  s +=       "<select id=\"ssid\" name=\"ssid\">\r\n";
  s +=         "<option value=\"\">-- Select a network --</option>\r\n";

  int networksLength = WiFi.scanNetworks();
  for (int networkIndex = 0; networkIndex < networksLength; networkIndex++) {
    String ssid = WiFi.SSID(networkIndex);
    s +=       "<option value=\"" + ssid + "\"" +
        (selectedSSID == ssid ? " selected" : "") +
        ">" + ssid + "</option>\r\n";
  }

  s +=       "</select>\r\n";
  s +=     "</p>\r\n";
  s +=     "<p>\r\n";
  s +=       "<label for=\"key\">Key</label>\r\n";
  s +=       "<input type=\"password\" id=\"key\" name=\"key\"" + selectedKey + ">\r\n";
  s +=     "</p>\r\n";
  s +=     "<p>\r\n";
  s +=       "<input type=\"submit\" value=\"Connect\">\r\n";
  s +=     "</p>\r\n";
  s +=   "</form>\r\n";
  s += "</body>\r\n";
  s += "</html>\r\n";

  server.send(200, "text/html", s);
}

void handleIndex() {
  if (discoveryMode) {
    handleIndex_discovery();
  }

  else {
    handleIndex_temperature();
  }
}

void setup() {
  // Start logging to serial console
  Serial.begin(74880);

  // Setup I/O pins
  pinMode(LED_PIN, OUTPUT);
  pinMode(DISCOVER_PIN, INPUT);
  digitalWrite(LED_PIN, HIGH);
  digitalWrite(DISCOVER_PIN, HIGH);

  startAccessPoint();

  sensors.begin();

  server.on("/", handleIndex);
  server.begin();
}
	// Install ESP8266 Board v2.1.0 by adding this
	// to the "Additional Board Manager URLs" in
	// "Preferences..." and then select it for
	// installation via "Boards Manager..." under
	// the "Tools" -> "Board: XXX" menu.
	// http://arduino.esp8266.com/stable/package_esp8266com_index.json
	#include <ESP8266WiFi.h>
	#include <ESP8266WebServer.h>
	#include <ESP8266mDNS.h>
	#include <WiFiUdp.h>

	// OneWire v2.3.2 (Install via "Manage Libraries...")
	#include <OneWire.h>

	// DallasTemperature v3.7.6 (Install via "Manage Libraries...")
	#include <DallasTemperature.h>

	// NOTES:
	// * Use 74880 baud rate in "Serial Monitor"
	// to view logger info.
	// * Select 921600 baud rate under the
	// "Tools" -> "Upload Speed: XXX" menu for
	// faster flash programming (tested and
	// works fine with "SparkFun Thing Dev").

	// Pin definitions
	const int ONE_WIRE_BUS = 0; // OneWire bus
	const int DISCOVER_PIN = 2; // Button for toggling discovery
	const int LED_PIN = 5; // Thing's onboard, green LED

	const int MIN_DEBOUNCE_COUNT = 10;

	// Debounce variables
	bool discoveryMode = false;
	int discoverValue = LOW;
	int discoverCount = 0;
	int discoverLastValue;
	long discoverLastTime = 0;

	OneWire oneWire(ONE_WIRE_BUS);
	DallasTemperature sensors(&oneWire);

	ESP8266WebServer server(80);

	String selectedSSID = "";
	String selectedKey = "";

	String getDeviceName() {
	uint8_t mac[WL_MAC_ADDR_LENGTH];
	WiFi.softAPmacAddress(mac);
	String macID = String(mac[WL_MAC_ADDR_LENGTH - 2], HEX) +
	String(mac[WL_MAC_ADDR_LENGTH - 1], HEX);
	macID.toUpperCase();

	return "TemperatureSensor-" + macID;
	}

	void startAccessPoint() {
	discoveryMode = true;

	Serial.println("DISCOVERY MODE");
	digitalWrite(LED_PIN, LOW);

	WiFi.disconnect();
	delay(4000);
	WiFi.mode(WIFI_AP);

	String AP_NameString = getDeviceName();

	char AP_NameChar[AP_NameString.length() + 1];
	memset(AP_NameChar, 0, AP_NameString.length() + 1);

	for (int i=0; i<AP_NameString.length(); i++)
	AP_NameChar[i] = AP_NameString.charAt(i);

	WiFi.softAP(AP_NameChar);

	IPAddress ipAddress = WiFi.softAPIP();

	Serial.println("Access point: " + AP_NameString);
	Serial.println("IP address: " + ipAddress.toString());
	}

	void stopAccessPoint() {
	discoveryMode = false;

	Serial.println("TEMPERATURE MODE");
	digitalWrite(LED_PIN, HIGH);

	WiFi.softAPdisconnect();
	delay(4000);
	WiFi.mode(WIFI_STA);

	WiFi.begin(selectedSSID.c_str(), selectedKey.c_str());

	Serial.print("Connecting to: " + selectedSSID);

	while (WiFi.status() != WL_CONNECTED && !discoveryMode) {
	delay(500);
	Serial.print(".");
	}

	IPAddress ipAddress = WiFi.localIP();

	Serial.println("");
	Serial.println("IP address: " + ipAddress.toString());

	MDNS.begin(getDeviceName().c_str(), ipAddress);
	MDNS.addService("http", "tcp", 80);
	}

	void loop() {
	if (millis() != discoverLastTime) {
	discoverLastValue = digitalRead(DISCOVER_PIN);

	if (discoverLastValue == discoverValue && discoverCount > 0) {
	discoverCount--;
	}

	if (discoverLastValue != discoverValue) {
	discoverCount++;
	}

	if (discoverCount >= MIN_DEBOUNCE_COUNT) {
	discoverCount = 0;
	discoverValue = discoverLastValue;

	if (discoverValue == LOW) {
	if (discoveryMode) {
	stopAccessPoint();
	}

	else {
	startAccessPoint();
	}
	}
	}

	discoverLastTime = millis();
	}

	server.handleClient();
	}

	void handleIndex_temperature() {
	String s = "";

	// Read the temperature from the OneWire bus.
	sensors.requestTemperatures();

	float tempC = sensors.getTempCByIndex(0);
	float tempF = DallasTemperature::toFahrenheit(tempC);
	char buffer[10];
	String tempString = dtostrf(tempF, 4, 1, buffer);

	s += "<!DOCTYPE html>\r\n";
	s += "<html>\r\n";
	s += "<head>\r\n";
	s += "<title>ESP8266 Temperature Monitor</title>\r\n";
	s += "<meta name=\"viewport\" content=\"width=device-width,user-scalable=no,initial-scale=1\">\r\n";
	s += "<meta http-equiv=\"refresh\" content=\"5\">\r\n";
	s += "</head>\r\n";
	s += "<body>\r\n";
	s += "<h1>Temperature: " + tempString + "</h1>\r\n";
	s += "</body>\r\n";
	s += "</html>\r\n";

	server.send(200, "text/html", s);
	}

	void handleIndex_connecting() {
	String s = "";

	s += "<!DOCTYPE html>\r\n";
	s += "<html>\r\n";
	s += "<head>\r\n";
	s += "<title>ESP8266 Temperature Monitor</title>\r\n";
	s += "<meta name=\"viewport\" content=\"width=device-width,user-scalable=no,initial-scale=1\">\r\n";
	s += "</head>\r\n";
	s += "<body>\r\n";
	s += "<h1>Network settings saved! Restarting...</h1>\r\n";
	s += "</body>\r\n";
	s += "</html>\r\n";

	server.send(200, "text/html", s);
	}

	void handleIndex_discovery() {
	String s = "";

	if (server.method() == HTTP_POST) {
	selectedSSID = server.arg("ssid");
	selectedKey = server.arg("key");

	handleIndex_connecting();
	stopAccessPoint();
	}

	s += "<!DOCTYPE html>\r\n";
	s += "<html>\r\n";
	s += "<head>\r\n";
	s += "<title>ESP8266 Temperature Monitor</title>\r\n";
	s += "<meta name=\"viewport\" content=\"width=device-width,user-scalable=no,initial-scale=1\">\r\n";
	s += "</head>\r\n";
	s += "<body>\r\n";
	s += "<h1>Select your network</h1>\r\n";
	s += "<form method=\"POST\" action=\"/\">\r\n";
	s += "<p>\r\n";
	s += "<label for=\"ssid\">SSID</label>\r\n";
	s += "<select id=\"ssid\" name=\"ssid\">\r\n";
	s += "<option value=\"\">-- Select a network --</option>\r\n";

	int networksLength = WiFi.scanNetworks();
	for (int networkIndex = 0; networkIndex < networksLength; networkIndex++) {
	String ssid = WiFi.SSID(networkIndex);
	s += "<option value=\"" + ssid + "\"" +
	(selectedSSID == ssid ? " selected" : "") +
	">" + ssid + "</option>\r\n";
	}

	s += "</select>\r\n";
	s += "</p>\r\n";
	s += "<p>\r\n";
	s += "<label for=\"key\">Key</label>\r\n";
	s += "<input type=\"password\" id=\"key\" name=\"key\"" + selectedKey + ">\r\n";
	s += "</p>\r\n";
	s += "<p>\r\n";
	s += "<input type=\"submit\" value=\"Connect\">\r\n";
	s += "</p>\r\n";
	s += "</form>\r\n";
	s += "</body>\r\n";
	s += "</html>\r\n";

	server.send(200, "text/html", s);
	}

	void handleIndex() {
	if (discoveryMode) {
	handleIndex_discovery();
	}

	else {
	handleIndex_temperature();
	}
	}

	void setup() {
	// Start logging to serial console
	Serial.begin(74880);

	// Setup I/O pins
	pinMode(LED_PIN, OUTPUT);
	pinMode(DISCOVER_PIN, INPUT);
	digitalWrite(LED_PIN, HIGH);
	digitalWrite(DISCOVER_PIN, HIGH);

	startAccessPoint();

	sensors.begin();

	server.on("/", handleIndex);
	server.begin();
	}