问题描述
我目前正在尝试将数据记录器与 OLED 屏幕组合在一起,但在将 SD 库添加到脚本时遇到了问题。我已经看到其他人在结合与 RAM 相关的 Oled 和 SD 卡时收到错误消息。虽然在我的情况下,代码运行,没有错误消息,但屏幕没有显示任何内容。下面的代码显示了“OLED 代码”,当我添加“#include
谢谢!
#include <SPI.h>
#include <SD.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "Adafruit_MCP9808.h"
#include <Adafruit_BME280.h>
Adafruit_BME280 bme; // use I2C interface
Adafruit_Sensor *bme_temp = bme.getTemperatureSensor();
Adafruit_Sensor *bme_pressure = bme.getPressureSensor();
Adafruit_Sensor *bme_humidity = bme.getHumiditySensor();
//oled deFinitions
#define SCREEN_WIDTH 128 // OLED display width,in pixels
#define SCREEN_HEIGHT 64 // OLED display height,in pixels
// Declaration for an SSD1306 display connected to I2C (SDA,SCL pins)
#define OLED_RESET 4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH,SCREEN_HEIGHT,&Wire,OLED_RESET);
// Create the MCP9808 temperature sensor object
Adafruit_MCP9808 tempsensor = Adafruit_MCP9808();
void setup() {
Serial.begin(9600);
display.begin(SSD1306_SWITCHCAPVCC,0x3D); // Address 0x3D for 128x64
// Clear the buffer
display.display();
delay(2000);
display.cleardisplay();
display.setTextSize(1);
display.setCursor(0,0);
display.setTextColor(WHITE);
while (!Serial);
Serial.println("Loading");
if (!tempsensor.begin(0x18)) {
Serial.println("Couldn't find MCP9808! Check your connections and verify the address is correct.");
while (1);
}
Serial.println(F("Found MCP9808!"));
tempsensor.setResolution(3); // sets the resolution mode of reading,the modes are defined in the table bellow:
// Mode Resolution SampleTime
// 0 0.5°C 30 ms
// 1 0.25°C 65 ms
// 2 0.125°C 130 ms
// 3 0.0625°C 250 ms
if (!bme.begin()) {
Serial.println(F("Could not find a valid BME280 sensor,check wiring!"));
while (1) delay(10);
}
bme_temp->printSensorDetails();
bme_pressure->printSensorDetails();
bme_humidity->printSensorDetails();
}
void loop() {
float temp = bme.readTemperature(); // get temperature in degree Celsius
float humi = bme.readHumidity(); // get humidity in rH%
float pres = bme.readPressure(); // get pressure in Pa
tempsensor.wake();
//Serial.println (tempsensor.getResolution());
float c = tempsensor.readTempC();
float f = tempsensor.readTempF();
//float sensor=analogRead(A4);
display.setCursor(0,0);
display.print(F("Temp_1: "));
display.print(c,2);display.println(" \tC ");
display.println("");
display.print(F("Temp_2: "));
display.print(temp,2);display.println(" \tC ");
display.println("");
display.print(F("Humidity: "));
display.print(humi,2);display.println(" %rH ");
display.println("");
display.print(F("Pressure: "));
display.print(pres/100,2);display.println(" kPa ");
display.display();
delay(1000);
display.cleardisplay();
解决方法
这显然是内存问题。
我现在连接了 Arduino Mega 而不是 Nano,并且代码运行良好。我还添加了记录传感器读数所需的剩余代码。
根据我在其他论坛上看到的内容,SD 和 SPI 库占用了相当多的内存。