84 lines
1.7 KiB
Arduino
84 lines
1.7 KiB
Arduino
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#include <OneWire.h>
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#include <DallasTemperature.h>
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#include <U8g2lib.h>
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#include <SD.h>
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#define ONE_WIRE_BUS D4
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#define PIN_CS D8
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#define STATUS_OK 0
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#define STATUS_SD_INIT_FAILED 1
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#define STATUS_SD_WRITE_FAILED 2
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#define ODD 1
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#define EVEN 2
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OneWire oneWire( ONE_WIRE_BUS );
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DallasTemperature DS18B20( &oneWire );
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U8G2_SSD1306_128X64_NONAME_F_HW_I2C display(U8G2_R0);
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int status = STATUS_OK;
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int oddEvenLoop = ODD;
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void setup() {
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Serial.begin(115200);
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DS18B20.begin();
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display.begin();
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if (!SD.begin(PIN_CS)) {
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status = STATUS_SD_INIT_FAILED;
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}
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}
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void loop() {
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char tempStr[6];
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long uptimeSec = millis() / 1000;
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DS18B20.requestTemperatures();
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float tempFl = DS18B20.getTempCByIndex(0);
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dtostrf(tempFl, 4, 1, tempStr);
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Serial.print(uptimeSec);
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Serial.print(": ");
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Serial.println(tempStr);
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display.clearBuffer();
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display.setFont(u8g2_font_fub11_tf);
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switch(status) {
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case STATUS_SD_INIT_FAILED:
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display.drawStr(0, 11, "SD init failed");
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break;
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case STATUS_SD_WRITE_FAILED:
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display.drawStr(0, 11, "SD write failed");
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break;
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case STATUS_OK:
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default:
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if (oddEvenLoop == ODD) {
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display.drawStr(0, 11, "Temperatur *");
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oddEvenLoop = EVEN;
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} else {
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display.drawStr(0, 11, "Temperatur #");
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oddEvenLoop = ODD;
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}
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}
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display.setFont(u8g2_font_fub42_tn);
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display.drawStr(8, 63, tempStr);
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display.sendBuffer();
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if (status != STATUS_SD_INIT_FAILED) {
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File fd = SD.open("temp.csv", FILE_WRITE);
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if (fd) {
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fd.print(uptimeSec);
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fd.print(";");
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fd.println(tempStr);
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fd.close();
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status = STATUS_OK;
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} else {
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status = STATUS_SD_WRITE_FAILED;
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}
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}
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delay(5000);
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}
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