Arduino code for PaHuB2 + any I2C sensor

EKTan

Dear all,

I looking for the sample code reading the values from the I2C module (like ENV III) that is connected to the PaHUB2 socket 0 (PaHUB2 has I2C address 0x71).

Thank you.

EKTan

Dear all,
I'm looking for the sample Arduino code to read the ENV III module that is connected to the PaHUB2 socket 0 (PaHUB2 has an I2C address 0x71).

Thank you.

teastain

@ektan Sorry, this took me all day to write and de-bug.
It is an ENVIII on position 0 and ENVII on position 1, as that is what I have!

#include <M5Stack.h>  //use any controller by substituting the library
#include "M5_ENV.h"
SHT3X sht30;  // creates ONE instance!!!
float tmp1 = 12.3;
float hum1 = 0.0;
float tmp2 = 12.3;
float hum2 = 0.0;

void setup() {
  M5.begin();
  M5.Power.begin();
  delay(100);
  Wire.begin();
  sht30.init();
  Wire.beginTransmission(0x70);  //(the PaHub)
  Wire.write(0x00);              //turns off all ports
  Wire.endTransmission();        // as it says!
  M5.Lcd.setTextSize(3);         //or lower for StickC
  M5.Lcd.setTextColor(RED);
  M5.Lcd.print("Setup  ");
  delay(1000);
}
void loop() {
  Wire.beginTransmission(0x70);  //(the PaHub)
  Wire.write(0x01);              //turns on port 0, ENV1
  Wire.endTransmission();
  if (sht30.get() == 0) {   // Obtain the data of shT30.  
    tmp1 = sht30.cTemp;     // Store the temperature obtained from shT30.
    hum1 = sht30.humidity;  // Store the humidity obtained from the SHT30.
             } else {
    tmp1 = 0, hum1 = 0;
  }
  delay(100);
  Wire.beginTransmission(0x70);  //(the PaHub)
  Wire.write(0x02);              //reads the ENV at port 1
  Wire.endTransmission();
  if (sht30.get() == 0) {   // Obtain the data of shT30. 
    tmp2 = sht30.cTemp;     // Store the temperature obtained from shT30.
    hum2 = sht30.humidity;  // Store the humidity obtained from the SHT30.
    } else {
    tmp2 = 0, hum2 = 0;
  }
  delay(100);
  M5.Lcd.fillRect(0, 0, 320, 80, BLACK);
  M5.Lcd.setCursor(5, 5);
  M5.Lcd.print("Temp1=  ");
  M5.Lcd.setCursor(130, 5);
  M5.Lcd.print(tmp1, 1);  //one decimal place
  M5.Lcd.setCursor(5, 50);
  M5.Lcd.print("Temp2=  ");
  M5.Lcd.setCursor(130, 50);
  M5.Lcd.print(tmp2, 1);  //one decimal place
  delay(1000);
}

There is no PaHub library because the Wire C-code is in-line with the Arduino code.
This is actually easier to understand and illustrates how the PaHub works.
-Terry

EKTan

@teastain

Thank you so much for the help.
It works perfectly...

crami25

@teastain In Arduino you can uise the PCA9548 library .
Example : https://randomnerdtutorials.com/tca9548a-i2c-multiplexer-esp32-esp8266-arduino/