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https://github.com/airgradienthq/arduino.git
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Improved example code DIY Basic
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@ -9,7 +9,7 @@ Kits (including a pre-soldered version) are available: https://www.airgradient.c
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The codes needs the following libraries installed:
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“WifiManager by tzapu, tablatronix” tested with version 2.0.11-beta
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"ESP8266 and ESP32 OLED driver for SSD1306 displays by ThingPulse, Fabrice Weinberg" tested with Version 4.1.0
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“U8g2” by oliver tested with version 2.32.15
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Configuration:
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Please set in the code below the configuration parameters.
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@ -29,26 +29,30 @@ MIT License
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#include <ESP8266WiFi.h>
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#include <ESP8266HTTPClient.h>
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#include <WiFiClient.h>
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#include <Wire.h>
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#include "SSD1306Wire.h"
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#include <U8g2lib.h>
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AirGradient ag = AirGradient();
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SSD1306Wire display(0x3c, SDA, SCL);
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U8G2_SSD1306_64X48_ER_1_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE); //for DIY BASIC
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// CONFIGURATION START
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// set to true to switch PM2.5 from ug/m3 to US AQI
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boolean inUSaqi = true;
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//set to the endpoint you would like to use
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String APIROOT = "http://hw.airgradient.com/";
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// set to true to switch from Celcius to Fahrenheit
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boolean inF = false;
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// set to true if you want to connect to wifi. The display will show values only when the sensor has wifi connection
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// PM2.5 in US AQI (default ug/m3)
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boolean inUSAQI = false;
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// set to true if you want to connect to wifi. You have 60 seconds to connect. Then it will go into an offline mode.
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boolean connectWIFI=true;
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// CONFIGURATION END
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unsigned long currentMillis = 0;
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const int oledInterval = 5000;
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@ -69,24 +73,20 @@ const int tempHumInterval = 2500;
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unsigned long previousTempHum = 0;
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float temp = 0;
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int hum = 0;
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int displaypage = 0;
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String APIROOT = "http://hw.airgradient.com/";
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long val;
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void setup()
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{
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Serial.begin(115200);
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display.init();
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display.flipScreenVertically();
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u8g2.begin();
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updateOLED();
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if (connectWIFI) {
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connectToWifi();
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}
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showTextRectangle("Init", String(ESP.getChipId(), HEX), true);
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updateOLED2("Warming", "up the", "sensors");
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ag.CO2_Init();
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ag.PMS_Init();
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@ -137,46 +137,38 @@ void updateOLED() {
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if (currentMillis - previousOled >= oledInterval) {
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previousOled += oledInterval;
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switch (displaypage) {
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case 0:
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if (inUSaqi) {
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showTextRectangle("AQI", String(PM_TO_AQI_US(pm25)), false);
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} else {
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showTextRectangle("PM2", String(pm25), false);
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}
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displaypage = 1;
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break;
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case 1:
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showTextRectangle("CO2", String(Co2), false);
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displaypage = 2;
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break;
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case 2:
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if (inF) {
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showTextRectangle("F", String((temp * 9 / 5) + 32), false);
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} else {
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showTextRectangle("C", String(temp), false);
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}
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displaypage = 3;
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break;
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case 3:
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showTextRectangle("Hum", String(hum)+"%", false);
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displaypage = 0;
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break;
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String ln1;
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String ln2;
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String ln3;
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if (inUSAQI){
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ln1 = "AQI:" + String(PM_TO_AQI_US(pm25)) ;
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} else {
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ln1 = "PM: " + String(pm25) +"ug" ;
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}
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ln2 = "CO2:" + String(Co2);
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if (inF) {
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ln3 = String((temp* 9 / 5) + 32).substring(0,4) + " " + String(hum)+"%";
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} else {
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ln3 = String(temp).substring(0,4) + " " + String(hum)+"%";
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}
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updateOLED2(ln1, ln2, ln3);
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}
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}
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void showTextRectangle(String ln1, String ln2, boolean small) {
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display.clear();
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display.setTextAlignment(TEXT_ALIGN_LEFT);
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if (small) {
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display.setFont(ArialMT_Plain_16);
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} else {
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display.setFont(ArialMT_Plain_24);
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}
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display.drawString(32, 16, ln1);
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display.drawString(32, 38, ln2);
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display.display();
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void updateOLED2(String ln1, String ln2, String ln3) {
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char buf[9];
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u8g2.firstPage();
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u8g2.firstPage();
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do {
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u8g2.setFont(u8g2_font_t0_16_tf);
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u8g2.drawStr(1, 10, String(ln1).c_str());
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u8g2.drawStr(1, 28, String(ln2).c_str());
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u8g2.drawStr(1, 46, String(ln3).c_str());
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} while ( u8g2.nextPage() );
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}
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void sendToServer() {
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@ -190,7 +182,6 @@ void sendToServer() {
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+ (hum < 0 ? "" : ", \"rhum\":" + String(hum))
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+ "}";
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if(WiFi.status()== WL_CONNECTED){
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Serial.println(payload);
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String POSTURL = APIROOT + "sensors/airgradient:" + String(ESP.getChipId(), HEX) + "/measures";
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@ -215,10 +206,12 @@ void sendToServer() {
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void connectToWifi() {
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WiFiManager wifiManager;
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//WiFi.disconnect(); //to delete previous saved hotspot
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String HOTSPOT = "AIRGRADIENT-" + String(ESP.getChipId(), HEX);
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String HOTSPOT = "AG-" + String(ESP.getChipId(), HEX);
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updateOLED2("Connect", "Wifi", HOTSPOT);
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delay(2000);
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wifiManager.setTimeout(60);
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if (!wifiManager.autoConnect((const char * ) HOTSPOT.c_str())) {
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showTextRectangle("offline", "mode", true);
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updateOLED2("Booting", "offline", "mode");
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Serial.println("failed to connect and hit timeout");
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delay(6000);
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}
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