Create arduino-esp8266-mh-z19-serial-no-lcd.ino

Copy of the script without LCD support.

arduino-esp8266-mh-z19-serial-no-lcd.ino

@@ -0,0 +1,210 @@
+#include <SoftwareSerial.h>
+#include <DHT.h> // https://github.com/adafruit/DHT-sensor-library
+#include <ESP8266WiFi.h>
+#include <WiFiClient.h>
+#include <Wire.h>
+#include <ArduinoJson.h> // https://github.com/bblanchon/ArduinoJson
+#include "WiFiUtils.h"
+#include "WiFiCreds.h"
+#include "dataServer.h"
+
+#define INTERVAL 5000
+#define DHT_PIN D5
+#define DHT_VERSION DHT22
+#define MH_Z19_RX D7
+#define MH_Z19_TX D6
+#define WIFI_MAX_ATTEMPTS_INIT 3 //set to 0 for unlimited, do not use more then 65535
+#define WIFI_MAX_ATTEMPTS_SEND 1 //set to 0 for unlimited, do not use more then 65535
+#define MAX_DATA_ERRORS 150 //max of errors, reset after them
+#define USE_GOOGLE_DNS true
+
+long previousMillis = 0;
+int errorCount = 0;
+WiFiClient client;
+WiFiUtils wifiUtils;
+DHT dht(DHT_PIN, DHT_VERSION);//define temperature and humidity sensor
+SoftwareSerial co2Serial(MH_Z19_RX, MH_Z19_TX); // define MH-Z19
+
+void(* resetFunc) (void) = 0; //declare reset function @ address 0
+
+
+int readCO2()
+{
+
+  byte cmd[9] = {0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79};
+  // command to ask for data
+  char response[9]; // for answer
+
+  co2Serial.write(cmd, 9); //request PPM CO2
+  co2Serial.readBytes(response, 9);
+  if (response[0] != 0xFF)
+  {
+    Serial.println("Wrong starting byte from co2 sensor!");
+    return -1;
+  }
+
+  if (response[1] != 0x86)
+  {
+    Serial.println("Wrong command from co2 sensor!");
+    return -1;
+  }
+
+  int responseHigh = (int) response[2];
+  int responseLow = (int) response[3];
+  int ppm = (256 * responseHigh) + responseLow;
+  return ppm;
+}
+
+bool sendData(JsonObject& root)
+{
+  Serial.println("Starting connection to server...");
+  bool res = false;
+  if (client.connect(DATA_SERVER, 80))
+  {
+    Serial.println("connected to server");
+    // Make a HTTP request:
+    /*client.println("GET /send.php?data={\"id\":1,\"temp\":" + String(t) + ",\"humidity\":" + String(h) + ",\"ppm\":" + String((int)ppm) +
+                   ",\"mac\":\"" + String(macStr) + "\",\"FreeRAM\":\"" + String(mem) + "\",\"SSID\":\"" + WiFi.SSID() + "\"} HTTP/1.1");
+    */
+    client.println("POST " + String(DATA_URL) + " HTTP/1.1");
+    client.println("Host: " + String(DATA_SERVER));
+    client.println("Connection: close");
+    client.println("User-Agent: Arduino/1.0");
+    client.println("Content-Type: application/x-www-form-urlencoded;");
+
+    client.print("Content-Length: ");
+    String data;
+    root.printTo(data);
+
+    //Serial.println("data to send:");
+    //Serial.println(data);
+    data = "data=" + data;
+    client.println(data.length());
+    client.println();
+    client.println(data);
+
+    if (client.available())
+    {
+      res = true;//TODO: check if reply is really OK
+      Serial.println("Server reply:");
+      Serial.println("");
+      while (client.available()) {
+        char c = client.read();
+        Serial.print(c);
+      }
+    }
+    client.stop();
+    return res;
+  }
+  else
+  {
+    Serial.println("Failed to connect to server");
+    return false;
+  }
+}
+
+
+
+void setup() {
+  Serial.begin(115200); // Init console
+  Serial.println("Setup started");
+
+  unsigned long previousMillis = millis();
+  co2Serial.begin(9600); //Init sensor MH-Z19(14)
+  dht.begin();
+
+
+  if (WiFi.status() == WL_NO_SHIELD) {
+    Serial.println("WiFi shield not present");
+    // don't continue:
+    while (true)
+      delay(1000);
+  }
+
+
+
+  // attempt to connect to Wifi network:
+  unsigned int attempt = 0;
+  while ( WiFi.status() != WL_CONNECTED) {
+    if (WIFI_MAX_ATTEMPTS_INIT != 0 && attempt > WIFI_MAX_ATTEMPTS_INIT)
+      break;
+    if (attempt >= 65535)
+      attempt = 0;
+    attempt++;
+    Serial.print("Attempting to connect to WPA SSID: ");
+    Serial.println(ssid);
+    // Connect to WPA/WPA2 network:
+    WiFi.begin(ssid, pass);
+    delay(10000);
+  }
+
+  if (USE_GOOGLE_DNS)
+    wifiUtils.setGoogleDNS();
+  // you're connected now, so print out the data:
+  Serial.println("Connected to network");
+  wifiUtils.printCurrentNet();
+  wifiUtils.printWifiData();
+
+  Serial.println("Waiting for sensors to init");
+  while (millis() - previousMillis < 10000)
+    delay(1000);
+  Serial.println("Setup finished");
+  Serial.println("");
+
+}
+
+void loop()
+{
+
+  unsigned long currentMillis = millis();
+  if (currentMillis - previousMillis < INTERVAL)
+    return;
+  previousMillis = currentMillis;
+  Serial.println("loop started");
+
+  if (errorCount > MAX_DATA_ERRORS)
+  {
+    Serial.println("Too many errors, resetting");
+
+    delay(2000);
+    resetFunc();
+  }
+  Serial.println("reading data:");
+  int ppm = readCO2();
+  bool dataError = false;
+  Serial.println("  PPM = " + String(ppm));
+
+  if (ppm < 100 || ppm > 6000)
+  {
+    Serial.println("PPM not valid");
+    dataError = true;
+  }
+  else
+  {
+    if (ppm >= 1000)
+      Serial.println(ppm);
+    else
+      Serial.println(ppm);
+  }
+  int mem = ESP.getFreeHeap();
+  Serial.println("  Free RAM: " + String(mem));
+
+
+
+  if (dataError)
+  {
+    Serial.println("Skipping loop");
+    errorCount++;
+    return;
+  }
+  errorCount = 0;
+
+  StaticJsonBuffer<200> jsonBuffer;
+  JsonObject& root = jsonBuffer.createObject();
+  root["id"] = DATA_SENSOR_ID;
+  root["ppm"] = ppm;
+  root["FreeRAM"] = mem;
+
+
+
+}