82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
#include <Wire.h>
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#include <Adafruit_GFX.h>
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#include <Adafruit_SH110X.h>
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#define oled_Address 0x3C // Change this if your OLED has a different I2C address
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#define SCREEN_WIDTH 128
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#define SCREEN_HEIGHT 64
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#define OLED_RESET -1
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int M3200address = 0x28; // 0x28, 0x36 or 0x46, depending on the sensor.
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float maxPressure = 100; // pressure in PSI for this sensor, 100, 250, 500, ... 10k.
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byte status;
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unsigned long pressureMillis = 0;
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const int pressureTiming = 500; // 500ms every data acquisition
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// Define the OLED display
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Adafruit_SH1106G display = Adafruit_SH1106G(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
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void setup() {
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Serial.begin(9600);
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Serial.println("M3200 initializing");
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Wire.begin();
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// Initialize the OLED display
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if (!display.begin(oled_Address)) {
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Serial.println("SSD1306 allocation failed");
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for (;;);
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}
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display.display(); // Clear the display buffer
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delay(2000); // Pause for 2 seconds
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display.clearDisplay(); // Clear the display buffer
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}
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void loop() {
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if (millis() - pressureMillis >= pressureTiming) {
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pressureMillis = millis();
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Wire.requestFrom(M3200address, 4); // request 4 bytes
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int n = Wire.available();
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if (n == 4) {
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status = 0;
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uint16_t rawP; // pressure data from sensor
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uint16_t rawT; // temperature data from sensor
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rawP = (uint16_t) Wire.read(); // upper 8 bits
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rawP <<= 8;
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rawP |= (uint16_t) Wire.read(); // lower 8 bits
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rawT = (uint16_t) Wire.read(); // upper 8 bits
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rawT <<= 8;
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rawT |= (uint16_t) Wire.read(); // lower 8 bits
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status = rawP >> 14; // The status is 0, 1, 2 or 3
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rawP &= 0x3FFF; // keep 14 bits, remove status bits
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rawT >>= 5; // the lowest 5 bits are not used
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float pressure = ((rawP - 1000.0) / (15000.0 - 1000.0)) * maxPressure;
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float temperature = ((rawT - 512.0) / (1075.0 - 512.0)) * 55.0;
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// Display data on OLED
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display.clearDisplay();
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display.setTextSize(1);
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display.setTextColor(SH110X_WHITE);
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display.setCursor(0, 0);
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display.print("Status: ");
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display.println(status);
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display.print("Pressure: ");
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display.print(pressure);
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display.println(" PSI");
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display.print("Temperature: ");
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display.print(temperature);
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display.println(" C");
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display.display();
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Serial.println("-------------------------------------");
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} else {
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Serial.println("M3200 Pressure Transducer not Detected");
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}
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}
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}
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