Hello,
I'm new to Arduino but not new to programming. I have a following setup:
-
Arduino Uno WiFi
-
Grove Base Shield v2
-
Shinyei PPD42 connected to D8 on Grove Shield
-
Temperature & Humidity Sensor v1.0 connected to I2C on Grove Shield
-
Air Quality Sensor v 1.3 connected to A0 on Grove Shield
All sensors are running because I can see the measurements on serial console. But I want to use Ciao in order to post data to Thingspeak. And this works as well but only when I unplug temp & humidity sensor from I2C port. Because if I don't then I can't see anything on WiFi Console when navigate browser to WiFi Uno setup page. It just stays blank, while when temp & humidity sensor is unplugged output is for example:
WiFi Start
Ciao is ready
Initializing air quality sensor ...
The init voltage is ... 60
Air quality sensor ready.
Test begin...
Air quality value: 58 Air fresh
Send data on ThingSpeak Channel
and so on.
I'm using this library for measuring temperature and humidity values: Grove - Temperature&Humidity Sensor (High-Accuracy &Mini) v1.0 | Seeed Studio Wiki
and here is my code for the whole thing:
#include <UnoWiFiDevEd.h>
#include <TH02_dev.h>
#include "AirQuality.h"
#include "Arduino.h"
#define CONNECTOR "rest"
#define SERVER_ADDR "api.thingspeak.com"
#define APIKEY_THINGSPEAK "xxxxxxxxxxxxxxx";
unsigned long starttime;
unsigned long sampletime_ms = 60000; // TIME BETWEEN MEASURES AND UPDATES
unsigned long triggerOnP2;
unsigned long triggerOffP2;
unsigned long pulseLengthP2;
unsigned long durationP2;
boolean valP2 = HIGH;
boolean triggerP2 = false;
float ratioP2 = 0;
float countP2;
float concLarge;
unsigned long triggerOnP1;
unsigned long triggerOffP1;
unsigned long pulseLengthP1;
unsigned long durationP1;
boolean valP1 = HIGH;
boolean triggerP1 = false;
float ratioP1 = 0;
float countP1;
float concSmall;
AirQuality airqualitysensor;
int current_quality =-1;
void setup() {
pinMode(8, INPUT); // > 1um
starttime = millis();
// Power up,delay 150ms,until voltage is stable for TH module to work
delay(150);
// Reset HP20x_dev
TH02.begin();
delay(100);
Ciao.begin();
Ciao.println("Ciao is ready");
airqualitysensor.init(14);
}
void measure(){
valP1 = digitalRead(8); // > 1um
valP2 = digitalRead(9); // > 2.5um
if(valP1 == LOW && triggerP1 == false){
triggerP1 = true;
triggerOnP1 = micros();
}
if (valP1 == HIGH && triggerP1 == true){
triggerOffP1 = micros();
pulseLengthP1 = triggerOffP1 - triggerOnP1;
durationP1 = durationP1 + pulseLengthP1;
triggerP1 = false;
}
if(valP2 == LOW && triggerP2 == false){
triggerP2 = true;
triggerOnP2 = micros();
}
if (valP2 == HIGH && triggerP2 == true){
triggerOffP2 = micros();
pulseLengthP2 = triggerOffP2 - triggerOnP2;
durationP2 = durationP2 + pulseLengthP2;
triggerP2 = false;
}
if ((millis() - starttime) > sampletime_ms) {
// Integer percentage 0=>100
ratioP1 = durationP1/(sampletime_ms*10.0); // Integer percentage 0=>100
ratioP2 = durationP2/(sampletime_ms*10.0);
countP1 = 1.1*pow(ratioP1,3)-3.8*pow(ratioP1,2)+520*ratioP1+0.62;
countP2 = 1.1*pow(ratioP2,3)-3.8*pow(ratioP2,2)+520*ratioP2+0.62;
float PM10count = countP1;
float PM25count = countP1 - countP2;
//PM10 count to mass concentration conversion
double r10 = 2.6*pow(10,-6);
double pi = 3.14159;
double vol10 = (4/3)*pi*pow(r10,3);
double density = 1.65*pow(10,12);
double mass10 = density*vol10;
double K = 3531.5;
concLarge = (PM10count)*K*mass10;
//PM2.5 count to mass concentration conversion
double r25 = 0.44*pow(10,-6);
double vol25 = (4/3)*pi*pow(r25,3);
double mass25 = density*vol25;
concSmall = (PM25count)*K*mass25;
// Measure the temperature
float temper = TH02.ReadTemperature();
// Measure the humidity
float humidity = TH02.ReadHumidity();
// Check the air pollution (harmful gases)
current_quality=airqualitysensor.slope();
String uri = "/update?api_key=";
uri += APIKEY_THINGSPEAK;
uri +="&field1=";
uri += String(concLarge);
uri +="&field2=";
uri += String(concSmall);
uri +="&field3=";
uri += String(temper);
uri +="&field4=";
uri += String(humidity);
uri +="&field5=";
uri += String(current_quality);
Ciao.println("Send data on ThingSpeak Channel");
CiaoData data = Ciao.write(CONNECTOR, SERVER_ADDR, uri);
if (!data.isEmpty()){
Ciao.println("PM10: " + String(concLarge));
Ciao.println("PM2.5: " + String(concSmall));
Ciao.println( "State: " + String (data.get(1)) );
Ciao.println( "Response: " + String (data.get(2)) );
}
else{
Ciao.println("Write Error");
}
//Reset Values
durationP1 = 0;
durationP2 = 0;
starttime = millis();
}
}
void loop() {
measure(); // Recall of the measure program
}
ISR(TIMER1_OVF_vect)
{
if(airqualitysensor.counter==61)//set 2 seconds as a detected duty
{
airqualitysensor.last_vol=airqualitysensor.first_vol;
airqualitysensor.first_vol=analogRead(A0);
airqualitysensor.counter=0;
airqualitysensor.timer_index=1;
PORTB=PORTB^0x20;
}
else
{
airqualitysensor.counter++;
}
}
As soon as I comment TH02.begin(); and unplug the sensor it starts working - meaning I can see output on WiFi console and data is posted online. But then I can't send my temperature and humidity measurements to Thingspeak 
I think there must be some kind of conflict between Ciao and TH02 libraries but can't find the root cause...