1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
// REQUIRES the following Arduino libraries:
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
// - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor
#include "DHT.h"
// #include "WiFi.h" // working with wifi, might interfere with pins (or so it seemed)
// #include "Arduino.h"
// #include "HTTPClient.h" // HTTP Handling
// #include "ArduinoJson.h" // JSON Handling
// CONFIGURATION
// DHT PINS
#define DHTPIN 4 // Digital pin connected to the DHT sensor
// Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14
// Uncomment whatever type you're using
//#define DHTTYPE DHT11 // DHT 11
#define DHTTYPE DHT11 // DHT 22 (AM2302), AM2321
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// DSM PINS
#define DSM501 18 // Just leave it as is
// END PIN CONFIGURATION SECTION
// SOME VARS
unsigned long duration;
unsigned long starttime;
unsigned long endtime;
unsigned long sampletime_ms = 1000;
unsigned long lowpulseoccupancy = 0;
float ratio = 0;
float concentration = 0;
uint32_t delayMS = 2000; // in loop delay() explicited
// WiFI stuff
const char* ssid = "Stefan's Galaxy A52s 5G";
const char* password = "12345678";
const char* apiEndpoint = "";
// Initialize DHT Sensor. The current DHT reading algorithm adjusts itself to work on faster procs. (rtfm --> docs)
DHT dht(DHTPIN, DHTTYPE);
void setup() { // Setup code that gets run regardless
Serial.begin(9600);
// WiFi.begin(ssid, password); // WiFi configuration at startup
// while (WiFi.status() != WL_CONNECTED) {
// delay(1000);
// Serial.println("Connecting to WiFi...");
// }
// Serial.println("Connected to WiFi");
Serial.println(F("----- DHT + MQ + DSM Interface -----"));
dht.begin(); // Begin DHT System at startup
pinMode(DSM501,INPUT); // Initialize DSM501A Sensor
starttime = millis();
}
void loop() { // Main code
// Wait a few seconds between measurements.
delay(delayMS);
// vvv DHT MEASUREMENTS SECTION vvv //
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true)
float f = dht.readTemperature(true);
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println(F("Failed to read from DHT sensor!"));
return;
}
// Compute heat index in Fahrenheit (the default)
float hif = dht.computeHeatIndex(f, h);
// Compute heat index in Celsius (isFahreheit = false)
float hic = dht.computeHeatIndex(t, h, false);
Serial.print(F("Humidity: "));
Serial.print(h);
Serial.print(F("% Temperature: "));
Serial.print(t);
Serial.print(F("°C "));
Serial.print(f);
Serial.print(F("°F Heat index: "));
Serial.print(hic);
Serial.print(F("°C "));
Serial.print(hif);
Serial.println(F("°F"));
// vvv MQ135 MEASUREMENTS SECTION vvv //
Serial.println(analogRead(15)); // MQ135 Sensor - ppm metrics (raw)
Serial.println(F("^ppm^"));
// vvv DSM501A MEASUREMENTS SECTION vvv //
duration = pulseIn(DSM501, LOW);
lowpulseoccupancy += duration;
starttime = millis();
endtime = starttime + sampletime_ms;
while ( starttime < endtime) {
ratio = (lowpulseoccupancy-endtime+starttime + sampletime_ms)/(sampletime_ms*10.0);
concentration = 1.1*pow(ratio,3)-3.8*pow(ratio,2)+520*ratio+0.62; // idk what s going on in here anymore.. it used to work, it doesn t now..
// concentration = 0.001915 * pow(low_ratio, 2) + 0.09522 * low_ratio - 0.04884;
Serial.print("lowpulseoccupancy: ");
Serial.print(lowpulseoccupancy);
Serial.print(" ratio: ");
Serial.print(ratio);
Serial.print(" DSM501A: ");
Serial.println(concentration);
lowpulseoccupancy = 0;
starttime = millis();
delay(2000);
}
}
|
