heltec.cn esp8622 wifi kit 8 olde 128x32
Posted: Wed Jun 20, 2018 2:18 amI am trying to use the built in olde to display data from a I2C temp sensor.
I am using Arduino IDE
If I create a sketch for just displaying data that works fine. If I create a sketch to read the temp sensor that works fine.
I can not figure out how to have the display which is I2C and the temp sensor also I2C on the same buss.. I2C scan sketches only show the display. I had to move the temp sensor to new pins and then use the wire.h begin() with the new pins to get it to even work on the esp.
If I try to have them both work in the same sketch the display doesn't work.
Why won't they both work on the same I2C buss / pins.
I am using Arduino IDE
If I create a sketch for just displaying data that works fine. If I create a sketch to read the temp sensor that works fine.
I can not figure out how to have the display which is I2C and the temp sensor also I2C on the same buss.. I2C scan sketches only show the display. I had to move the temp sensor to new pins and then use the wire.h begin() with the new pins to get it to even work on the esp.
If I try to have them both work in the same sketch the display doesn't work.
Why won't they both work on the same I2C buss / pins.
Code: Select all
#include <SPI.h>
#include <Wire.h>
#include "SparkFunMPL3115A2.h"
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define OLED_RESET 16
Adafruit_SSD1306 display(OLED_RESET);
#if (SSD1306_LCDHEIGHT != 32)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif
//Create an instance of the object
MPL3115A2 myPressure;
void setup() {
Serial.begin(9600);
// by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // initialize with the I2C addr 0x3C (for the 128x32)
display.clearDisplay();
}
void loop() {
// put your main code here, to run repeatedly:
Wire.begin(12,13); // Join i2c bus
myPressure.begin(); // Get sensor online
myPressure.setModetemp(); //
myPressure.setOversampleRate(7); // Set Oversample to the recommended 128
myPressure.enableEventFlags(); // Enable all three pressure and temp event flags
float temp = myPressure.readTempF();
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.clearDisplay();
display.setTextSize(4);
display.setTextColor(WHITE);
display.setCursor(0,0);
Serial.println(round(temp));
display.print(round(temp));
display.display();
delay(125);
}