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improved examples code
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Achim committed Dec 8, 2021
1 parent 348ddba commit 07e1b5e
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114 changes: 75 additions & 39 deletions examples/C02_PM_SHT_OLED_WIFI/C02_PM_SHT_OLED_WIFI.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -16,48 +16,59 @@ The codes needs the following libraries installed:
"WifiManager by tzapu, tablatronix" tested with Version 2.0.3-alpha
"ESP8266 and ESP32 OLED driver for SSD1306 displays by ThingPulse, Fabrice Weinberg" tested with Version 4.1.0
If you have any questions please visit our forum at https://forum.airgradient.com/
Configuration:
Please set in the code below which sensor you are using and if you want to connect it to WiFi.
You can also switch PM2.5 from ug/m3 to US AQI and Celcius to Fahrenheit
If you are a school or university contact us for a free trial on the AirGradient platform.
https://www.airgradient.com/schools/
Ready made kits with all required components are available at https://www.airgradient.com/diyshop/
Kits with all required components are available at https://www.airgradient.com/diyshop/
MIT License
*/

#include <AirGradient.h>

#include <WiFiManager.h>

#include <ESP8266WiFi.h>

#include <ESP8266HTTPClient.h>

#include <Wire.h>

#include "SSD1306Wire.h"

AirGradient ag = AirGradient();

SSD1306Wire display(0x3c, SDA, SCL);

WiFiClient client;

// set sensors that you do not use to false
boolean hasPM=true;
boolean hasCO2=true;
boolean hasSHT=true;
boolean hasPM = true;
boolean hasCO2 = true;
boolean hasSHT = true;

// set to true to switch PM2.5 from ug/m3 to US AQI
boolean inUSaqi = false;

// set to true to switch from Celcius to Fahrenheit
boolean inF = false;

// set to true if you want to connect to wifi. The display will show values only when the sensor has wifi connection
boolean connectWIFI=false;
boolean connectWIFI = false;

// change if you want to send the data to another server
String APIROOT = "http://hw.airgradient.com/";

void setup(){
void setup() {
Serial.begin(9600);

display.init();
display.flipScreenVertically();
showTextRectangle("Init", String(ESP.getChipId(),HEX),true);
showTextRectangle("Init", String(ESP.getChipId(), HEX), true);

if (hasPM) ag.PMS_Init();
if (hasCO2) ag.CO2_Init();
Expand All @@ -67,51 +78,64 @@ void setup(){
delay(2000);
}

void loop(){
void loop() {

// create payload

String payload = "{\"wifi\":" + String(WiFi.RSSI()) + ",";

if (hasPM) {
int PM2 = ag.getPM2_Raw();
payload=payload+"\"pm02\":" + String(PM2);
showTextRectangle("PM2",String(PM2),false);
payload = payload + "\"pm02\":" + String(PM2);

if (inUSaqi) {
showTextRectangle("AQI", String(PM_TO_AQI_US(PM2)), false);
} else {
showTextRectangle("PM2", String(PM2), false);
}

delay(3000);

}

if (hasCO2) {
if (hasPM) payload=payload+",";
if (hasPM) payload = payload + ",";
int CO2 = ag.getCO2_Raw();
payload=payload+"\"rco2\":" + String(CO2);
showTextRectangle("CO2",String(CO2),false);
payload = payload + "\"rco2\":" + String(CO2);
showTextRectangle("CO2", String(CO2), false);
delay(3000);
}

if (hasSHT) {
if (hasCO2 || hasPM) payload=payload+",";
if (hasCO2 || hasPM) payload = payload + ",";
TMP_RH result = ag.periodicFetchData();
payload=payload+"\"atmp\":" + String(result.t) + ",\"rhum\":" + String(result.rh);
showTextRectangle(String(result.t),String(result.rh)+"%",false);
payload = payload + "\"atmp\":" + String(result.t) + ",\"rhum\":" + String(result.rh);

if (inF) {
showTextRectangle(String((result.t * 9 / 5) + 32), String(result.rh) + "%", false);
} else {
showTextRectangle(String(result.t), String(result.rh) + "%", false);
}

delay(3000);
}

payload=payload+"}";
payload = payload + "}";

// send payload
if (connectWIFI){
Serial.println(payload);
String POSTURL = APIROOT + "sensors/airgradient:" + String(ESP.getChipId(),HEX) + "/measures";
Serial.println(POSTURL);
WiFiClient client;
HTTPClient http;
http.begin(client, POSTURL);
http.addHeader("content-type", "application/json");
int httpCode = http.POST(payload);
String response = http.getString();
Serial.println(httpCode);
Serial.println(response);
http.end();
if (connectWIFI) {
Serial.println(payload);
String POSTURL = APIROOT + "sensors/airgradient:" + String(ESP.getChipId(), HEX) + "/measures";
Serial.println(POSTURL);
WiFiClient client;
HTTPClient http;
http.begin(client, POSTURL);
http.addHeader("content-type", "application/json");
int httpCode = http.POST(payload);
String response = http.getString();
Serial.println(httpCode);
Serial.println(response);
http.end();
}
}

Expand All @@ -130,16 +154,28 @@ void showTextRectangle(String ln1, String ln2, boolean small) {
}

// Wifi Manager
void connectToWifi(){
void connectToWifi() {
WiFiManager wifiManager;
//WiFi.disconnect(); //to delete previous saved hotspot
String HOTSPOT = "AIRGRADIENT-"+String(ESP.getChipId(),HEX);
String HOTSPOT = "AIRGRADIENT-" + String(ESP.getChipId(), HEX);
wifiManager.setTimeout(120);
if(!wifiManager.autoConnect((const char*)HOTSPOT.c_str())) {
Serial.println("failed to connect and hit timeout");
delay(3000);
ESP.restart();
delay(5000);
if (!wifiManager.autoConnect((const char * ) HOTSPOT.c_str())) {
Serial.println("failed to connect and hit timeout");
delay(3000);
ESP.restart();
delay(5000);
}

}

// Calculate PM2.5 US AQI
int PM_TO_AQI_US(int pm02) {
if (pm02 <= 12.0) return ((50 - 0) / (12.0 - .0) * (pm02 - .0) + 0);
else if (pm02 <= 35.4) return ((100 - 50) / (35.4 - 12.0) * (pm02 - 12.0) + 50);
else if (pm02 <= 55.4) return ((150 - 100) / (55.4 - 35.4) * (pm02 - 35.4) + 100);
else if (pm02 <= 150.4) return ((200 - 150) / (150.4 - 55.4) * (pm02 - 55.4) + 150);
else if (pm02 <= 250.4) return ((300 - 200) / (250.4 - 150.4) * (pm02 - 150.4) + 200);
else if (pm02 <= 350.4) return ((400 - 300) / (350.4 - 250.4) * (pm02 - 250.4) + 300);
else if (pm02 <= 500.4) return ((500 - 400) / (500.4 - 350.4) * (pm02 - 350.4) + 400);
else return 500;
};
4 changes: 4 additions & 0 deletions examples/C02_SIMPLE/C02_SIMPLE.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -10,9 +10,13 @@ SenseAir S8 (CO2 Sensor)
Please install ESP8266 board manager (tested with version 3.0.0)
If you have any questions please visit our forum at https://forum.airgradient.com/
If you are a school or university contact us for a free trial on the AirGradient platform.
https://www.airgradient.com/schools/
Kits with all required components are available at https://www.airgradient.com/diyshop/
MIT License
*/

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