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227 lines
5.0 KiB
227 lines
5.0 KiB
#include <Arduino.h>
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#include <avr/sleep.h>
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#include <Wire.h>
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#include <RtcDS3231.h>
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#include <HX711.h>
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#include <EepromAT24C32.h>
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RtcDS3231<TwoWire> Rtc(Wire);
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EepromAt24c32<TwoWire> RtcEeprom(Wire);HX711 scale;
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// void printDateTime(const RtcDateTime &dt);
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const int rtcPowerPin = 4;
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const int wakeUpPin = 7;
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const int ledPin = 17;
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const int scaleDataPin = 21;
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const int scaleSckPin = 20;
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const int scalePowerPin = 19;
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const int secondsTillNextWakeup = 3;
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const long interval = 50;
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const int memTotal = 4096;
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const int pageSize = 16;
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const int pageCount = (memTotal / pageSize) - 1;
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void wake()
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{
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sleep_disable();
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detachInterrupt(digitalPinToInterrupt(wakeUpPin));
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}
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void sleepNow()
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{
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set_sleep_mode(SLEEP_MODE_PWR_DOWN);
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noInterrupts();
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sleep_enable();
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attachInterrupt(digitalPinToInterrupt(wakeUpPin), wake, LOW);
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interrupts();
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sleep_cpu();
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}
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void setup()
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{
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delay(3000);
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Serial.begin(9660);
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Serial.println("Initializing.");
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pinMode(wakeUpPin, INPUT_PULLUP);
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pinMode(ledPin, OUTPUT);
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pinMode(scalePowerPin, OUTPUT);
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pinMode(rtcPowerPin, OUTPUT);
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digitalWrite(rtcPowerPin, HIGH);
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digitalWrite(scalePowerPin, HIGH);
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Rtc.Begin();
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RtcEeprom.Begin();
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scale.begin(scaleDataPin, scaleSckPin);
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scale.set_scale(1000.f); // this value is obtained by calibrating the scale with known weights; see the README for details
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scale.tare(); // reset the scale to 0
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RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
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if (!Rtc.IsDateTimeValid())
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{
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if (Rtc.LastError() != 0)
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{
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// we have a communications error
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// see https://www.arduino.cc/en/Reference/WireEndTransmission for
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// what the number means
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Serial.print("RTC communications error = ");
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Serial.println(Rtc.LastError());
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}
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else
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{
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Serial.println("RTC lost confidence in the DateTime!");
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Rtc.SetDateTime(compiled);
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}
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}
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if (!Rtc.GetIsRunning())
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{
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Serial.println("RTC was not actively running, starting now");
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Rtc.SetIsRunning(true);
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}
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RtcDateTime now = Rtc.GetDateTime();
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if (now < compiled)
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{
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Serial.println("RTC is older than compile time! (Updating DateTime)");
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Rtc.SetDateTime(compiled);
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}
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Rtc.Enable32kHzPin(false);
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Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeAlarmOne);
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}
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void loop()
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{
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pinMode(rtcPowerPin, OUTPUT);
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pinMode(scalePowerPin, OUTPUT);
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digitalWrite(scalePowerPin, HIGH);
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digitalWrite(rtcPowerPin, HIGH);
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digitalWrite(ledPin, LOW);
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delay(interval);
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scale.power_up();
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RtcDateTime now = Rtc.GetDateTime();
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RtcDateTime alarmTime = now + secondsTillNextWakeup;
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DS3231AlarmOne alarm1(
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alarmTime.Day(),
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alarmTime.Hour(),
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alarmTime.Minute(),
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alarmTime.Second(),
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DS3231AlarmOneControl_HoursMinutesSecondsMatch);
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Rtc.SetAlarmOne(alarm1);
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Rtc.LatchAlarmsTriggeredFlags();
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RtcTemperature temp = Rtc.GetTemperature();
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int lastA = -1;
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int lastB = -1;
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for (int i = 0; i <= pageCount; i++)
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{
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uint8_t x = RtcEeprom.GetMemory(i * pageSize);
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if ((char)x == 'a')
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{
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lastA = i;
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}
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if ((char)x == 'b')
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{
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lastB = i;
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}
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}
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int head = -1;
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uint8_t next = 'c';
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if (lastA == pageCount)
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{
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head = pageCount;
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next = 'b';
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}
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if (lastB == pageCount)
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{
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head = pageCount;
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next = 'a';
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}
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if (lastA > lastB)
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{
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head = lastB;
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next = 'b';
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}
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if (lastB > lastA)
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{
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head = lastA;
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next = 'a';
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}
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head = (head + 1) % pageCount;
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// Serial.print("Last a: ");
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// Serial.print(lastA);
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// Serial.print(", Last b: ");
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// Serial.print(lastB);
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// Serial.print(", HEAD: ");
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// Serial.print(head);
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// Serial.print(", next: ");
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// Serial.println((char)next);
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String buffer;
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buffer += String((char)next);
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buffer += String(scale.get_units(1), 2);
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buffer += F(" kg, ");
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buffer += String(temp.AsFloatDegC(), 2);
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buffer += F(" °C");
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// Serial.println(buffer);
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char data[pageSize];
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buffer.toCharArray(data, pageSize);
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RtcEeprom.SetMemory(head * pageSize, (const uint8_t *)data, sizeof(data) - 1);
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for (int i = 0; i <= pageCount; i++)
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{
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uint8_t buff[pageSize + 1];
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uint8_t gotten = RtcEeprom.GetMemory(i * pageSize, buff, pageSize);
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Serial.print(i);
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Serial.print(":\t");
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Serial.print("data read (");
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Serial.print(gotten);
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Serial.print(") = \"");
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for (uint8_t ch = 0; ch < gotten; ch++)
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{
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Serial.print((char)buff[ch]);
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}
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Serial.println("\"");
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}
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Serial.flush();
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scale.power_down();
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digitalWrite(scalePowerPin, LOW);
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digitalWrite(ledPin, HIGH);
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digitalWrite(rtcPowerPin, LOW);
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pinMode(rtcPowerPin, INPUT);
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pinMode(scalePowerPin, INPUT);
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sleepNow();
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}
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/ |