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182 lines
4.3 KiB
182 lines
4.3 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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#define countof(a) (sizeof(a) / sizeof(a[0]))
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RtcDS3231<TwoWire> Rtc(Wire);
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EepromAt24c32<TwoWire> RtcEeprom(Wire);
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HX711 scale;
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const float COEFF = 0.2157f;
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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 = 21600;
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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(15000);
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Serial.begin(9660);
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Serial.println();
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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);
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scale.tare();
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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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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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// const char data[] = "0 ";
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// for (int i = 0; i <= pageCount; i++)
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// {
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// RtcEeprom.SetMemory(i * pageSize, (const uint8_t *)data, sizeof(data) - 1); // remove the null terminator strings add
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// Serial.print('.');
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// }
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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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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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delay(15000);
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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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uint16_t highest = 0;
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uint32_t highestEpoch = 0;
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uint8_t epochBuff[40];
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for (int i = 0; i <= pageCount; i++)
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{
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uint16_t epochGotten = RtcEeprom.GetMemory(i * pageSize, epochBuff, 10);
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uint32_t epoch = strtol((const char *)epochBuff, NULL, 0);
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if (epoch > highestEpoch)
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{
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highest = i;
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highestEpoch = epoch;
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}
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}
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char memString[pageSize + 1];
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int16_t weight = scale.get_units(1) / COEFF;
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snprintf_P(memString, countof(memString), PSTR("%10ld%6d"), now.TotalSeconds(), weight);
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uint16_t head = (highest + 1) % (pageCount + 1);
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RtcEeprom.SetMemory(head * pageSize, (const uint8_t *)memString, pageSize);
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// Serial.println(memString);
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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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