Display data on OLED from BME280

#1

It is my first post here. I’m desperately looking for help.
I have Heltec WiFi LoRa 32 V3 with OLED display.
I successfully add BME280 sensor. But I have problem to display reading/data on OLED display.
Bellow is my code.
Program stops at “Could not find OLED”
When I try to run only BME28 - everything works fine.
Can correct my sketch to recognize OLED display
Thx in advance

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#include “HT_SSD1306Wire.h”

#define I2C_BME_SDA 41
#define I2C_BME_SCL 42
#define I2C_OLED_SCL 18
#define I2C_OLED_SDA 17

#define SEALEVELPRESSURE_HPA (1013.25)

Adafruit_BME280 bme;
TwoWire I2CBME = TwoWire(0);
TwoWire I2COLED = TwoWire(1);
unsigned long delayTime;

// For Ds18B20
#include “OneWire.h”
#include “DallasTemperature.h”

#define ONE_WIRE_BUS 4 // needs 4.7K pull up resistor

// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature sensor
DallasTemperature sensors(&oneWire);

float airTemperature;
float barometricPressure;
float airHumidity;
float waterTemperature;

void setup() {

Serial.begin(115200);
I2CBME.begin(I2C_BME_SDA, I2C_BME_SCL, 40000);
//Wire(begin);
bool status;
status = bme.begin(0x76, &I2CBME);

if (!status) {
	Serial.println("Could not find a valid BME280 sensor, check wiring!");
	while (1);
}

Serial.println("-- Default Test --");
delayTime = 1000;
Serial.println();
sensors.begin();

I2COLED.begin(I2C_OLED_SCL, I2C_OLED_SDA, 50000);

bool status2;
status2 = bme.begin(0x3c, &I2COLED);
if (!status2)
{
	Serial.println("Could not find OLED");
	while (1);
}

}

void loop()
{
printValues();
delay(delayTime);
}

static void printValues()
{
airTemperature = bme.readTemperature();
barometricPressure = bme.readPressure() / 100.0F;
airHumidity = bme.readHumidity();

sensors.requestTemperatures();
waterTemperature = sensors.getTempCByIndex(0);

Serial.print("Air Temperature = ");
Serial.print(airTemperature);
Serial.println(" *C");

Serial.print("Barometric Pressure = ");
Serial.print(barometricPressure);
Serial.println(" hPa");

Serial.print("Air Humidity = ");
Serial.print(airHumidity);
Serial.println(" %");

Serial.print("Water Temperature = ");
Serial.print(waterTemperature);
Serial.println(" *C");

Serial.println();

}

#2

ESP32 can support two sets of IICs, but you need to set them up so that they work on different IIs. Or you can time-share and reuse the same group

#3

There is some discussion here on the subject of I2C bus usage on the WiFi LoRa 32 V3 module that may help. In particular, note that the OLED display on the WiFI LoRa 32 V3 [implicitly] uses the first I2C bus and, that being the case, there will be less potential for ‘confusion’ if your sensors are configured on the second bus.

#4

Thank You very much - I’ll try - follow this discussion.

#5

May be a small issue but try also using similar quote marks in your includes " " Importing from a word processor introduces strange character options “HT_SSD1306Wire.h”