354 lines
8.7 KiB
Arduino
354 lines
8.7 KiB
Arduino
// Default sensor sketch for Sensebender Micro module
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// Act as a temperature / humidity sensor by default.
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//
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// If A0 is held low while powering on, it will enter testmode, which verifies all on-board peripherals
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//
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// Battery voltage is repported as child sensorId 199, as well as battery percentage (Internal message)
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#include <MySensor.h>
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#include <Wire.h>
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#include <SI7021.h>
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#include <SPI.h>
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#include <SPIFlash.h>
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#include <EEPROM.h>
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#include <sha204_lib_return_codes.h>
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#include <sha204_library.h>
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#include <RunningAverage.h>
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#include <avr/power.h>
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// Define a static node address, remove if you want auto address assignment
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//#define NODE_ADDRESS 3
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#define RELEASE "1.2"
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#define AVERAGES 2
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// Child sensor ID's
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#define CHILD_ID_TEMP 1
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#define CHILD_ID_HUM 2
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// How many milli seconds between each measurement
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#define MEASURE_INTERVAL 60000
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// FORCE_TRANSMIT_INTERVAL, this number of times of wakeup, the sensor is forced to report all values to the controller
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#define FORCE_TRANSMIT_INTERVAL 30
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// When MEASURE_INTERVAL is 60000 and FORCE_TRANSMIT_INTERVAL is 30, we force a transmission every 30 minutes.
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// Between the forced transmissions a tranmission will only occur if the measured value differs from the previous measurement
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// Pin definitions
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#define TEST_PIN A0
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#define LED_PIN A2
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#define ATSHA204_PIN 17 // A3
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const int sha204Pin = ATSHA204_PIN;
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atsha204Class sha204(sha204Pin);
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SI7021 humiditySensor;
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SPIFlash flash(8, 0x1F65);
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MySensor gw;
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// Sensor messages
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MyMessage msgHum(CHILD_ID_HUM, V_HUM);
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MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
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// Global settings
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int measureCount = 0;
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int sendBattery = 0;
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boolean isMetric = true;
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boolean highfreq = true;
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// Storage of old measurements
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float lastTemperature = -100;
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int lastHumidity = -100;
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long lastBattery = -100;
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RunningAverage raHum(AVERAGES);
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RunningAverage raTemp(AVERAGES);
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/****************************************************
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*
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* Setup code
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*
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****************************************************/
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void setup() {
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pinMode(LED_PIN, OUTPUT);
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digitalWrite(LED_PIN, LOW);
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Serial.begin(115200);
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Serial.print(F("Sensebender Micro FW "));
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Serial.print(RELEASE);
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Serial.flush();
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// First check if we should boot into test mode
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pinMode(TEST_PIN,INPUT);
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digitalWrite(TEST_PIN, HIGH); // Enable pullup
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if (!digitalRead(TEST_PIN)) testMode();
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// Make sure that ATSHA204 is not floating
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pinMode(ATSHA204_PIN, INPUT);
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digitalWrite(ATSHA204_PIN, HIGH);
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digitalWrite(TEST_PIN,LOW);
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digitalWrite(LED_PIN, HIGH);
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#ifdef NODE_ADDRESS
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gw.begin(NULL, NODE_ADDRESS, false);
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#else
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gw.begin(NULL,AUTO,false);
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#endif
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digitalWrite(LED_PIN, LOW);
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humiditySensor.begin();
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Serial.flush();
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Serial.println(F(" - Online!"));
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gw.sendSketchInfo("Sensebender Micro", RELEASE);
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gw.present(CHILD_ID_TEMP,S_TEMP);
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gw.present(CHILD_ID_HUM,S_HUM);
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isMetric = gw.getConfig().isMetric;
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Serial.print(F("isMetric: ")); Serial.println(isMetric);
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raHum.clear();
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raTemp.clear();
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sendTempHumidityMeasurements(false);
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sendBattLevel(false);
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}
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/***********************************************
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*
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* Main loop function
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*
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***********************************************/
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void loop() {
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measureCount ++;
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sendBattery ++;
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bool forceTransmit = false;
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if ((measureCount == 5) && highfreq)
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{
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clock_prescale_set(clock_div_8); // Switch to 1Mhz for the reminder of the sketch, save power.
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highfreq = false;
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}
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if (measureCount > FORCE_TRANSMIT_INTERVAL) { // force a transmission
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forceTransmit = true;
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measureCount = 0;
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}
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gw.process();
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sendTempHumidityMeasurements(forceTransmit);
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if (sendBattery > 60)
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{
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sendBattLevel(forceTransmit); // Not needed to send battery info that often
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sendBattery = 0;
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}
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gw.sleep(MEASURE_INTERVAL);
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}
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/*********************************************
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*
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* Sends temperature and humidity from Si7021 sensor
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*
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* Parameters
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* - force : Forces transmission of a value (even if it's the same as previous measurement)
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*
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*********************************************/
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void sendTempHumidityMeasurements(bool force)
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{
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bool tx = force;
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si7021_env data = humiditySensor.getHumidityAndTemperature();
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float oldAvgTemp = raTemp.getAverage();
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float oldAvgHum = raHum.getAverage();
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raTemp.addValue(data.celsiusHundredths / 100);
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raHum.addValue(data.humidityPercent);
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float diffTemp = abs(oldAvgTemp - raTemp.getAverage());
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float diffHum = abs(oldAvgHum - raHum.getAverage());
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Serial.println(diffTemp);
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Serial.println(diffHum);
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if (isnan(diffTemp)) tx = true;
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if (diffTemp > 0.2) tx = true;
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if (diffHum > 0.5) tx = true;
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if (tx) {
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measureCount = 0;
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float temperature = (isMetric ? data.celsiusHundredths : data.fahrenheitHundredths) / 100.0;
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int humidity = data.humidityPercent;
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Serial.print("T: ");Serial.println(temperature);
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Serial.print("H: ");Serial.println(humidity);
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gw.send(msgTemp.set(temperature,1));
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gw.send(msgHum.set(humidity));
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lastTemperature = temperature;
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lastHumidity = humidity;
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}
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}
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/********************************************
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*
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* Sends battery information (battery percentage)
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*
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* Parameters
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* - force : Forces transmission of a value
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*
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*******************************************/
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void sendBattLevel(bool force)
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{
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if (force) lastBattery = -1;
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long vcc = readVcc();
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if (vcc != lastBattery) {
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lastBattery = vcc;
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// Calculate percentage
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vcc = vcc - 1900; // subtract 1.9V from vcc, as this is the lowest voltage we will operate at
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long percent = vcc / 14.0;
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gw.sendBatteryLevel(percent);
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}
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}
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/*******************************************
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*
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* Internal battery ADC measuring
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*
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*******************************************/
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long readVcc() {
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// Read 1.1V reference against AVcc
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// set the reference to Vcc and the measurement to the internal 1.1V reference
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#if defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
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ADMUX = _BV(REFS0) | _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
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#elif defined (__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__)
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ADMUX = _BV(MUX5) | _BV(MUX0);
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#elif defined (__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
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ADcdMUX = _BV(MUX3) | _BV(MUX2);
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#else
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ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
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#endif
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delay(2); // Wait for Vref to settle
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ADCSRA |= _BV(ADSC); // Start conversion
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while (bit_is_set(ADCSRA,ADSC)); // measuring
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uint8_t low = ADCL; // must read ADCL first - it then locks ADCH
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uint8_t high = ADCH; // unlocks both
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long result = (high<<8) | low;
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result = 1125300L / result; // Calculate Vcc (in mV); 1125300 = 1.1*1023*1000
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return result; // Vcc in millivolts
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}
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/****************************************************
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*
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* Verify all peripherals, and signal via the LED if any problems.
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*
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****************************************************/
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void testMode()
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{
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uint8_t rx_buffer[SHA204_RSP_SIZE_MAX];
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uint8_t ret_code;
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byte tests = 0;
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digitalWrite(LED_PIN, HIGH); // Turn on LED.
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Serial.println(F(" - TestMode"));
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Serial.println(F("Testing peripherals!"));
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Serial.flush();
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Serial.print(F("-> SI7021 : "));
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Serial.flush();
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if (humiditySensor.begin())
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{
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Serial.println(F("ok!"));
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tests ++;
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}
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else
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{
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Serial.println(F("failed!"));
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}
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Serial.flush();
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Serial.print(F("-> Flash : "));
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Serial.flush();
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if (flash.initialize())
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{
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Serial.println(F("ok!"));
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tests ++;
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}
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else
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{
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Serial.println(F("failed!"));
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}
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Serial.flush();
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Serial.print(F("-> SHA204 : "));
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ret_code = sha204.sha204c_wakeup(rx_buffer);
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Serial.flush();
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if (ret_code != SHA204_SUCCESS)
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{
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Serial.print(F("Failed to wake device. Response: ")); Serial.println(ret_code, HEX);
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}
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Serial.flush();
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if (ret_code == SHA204_SUCCESS)
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{
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ret_code = sha204.getSerialNumber(rx_buffer);
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if (ret_code != SHA204_SUCCESS)
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{
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Serial.print(F("Failed to obtain device serial number. Response: ")); Serial.println(ret_code, HEX);
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}
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else
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{
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Serial.print(F("Ok (serial : "));
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for (int i=0; i<9; i++)
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{
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if (rx_buffer[i] < 0x10)
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{
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Serial.print('0'); // Because Serial.print does not 0-pad HEX
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}
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Serial.print(rx_buffer[i], HEX);
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}
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Serial.println(")");
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tests ++;
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}
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}
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Serial.flush();
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Serial.println(F("Test finished"));
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if (tests == 3)
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{
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Serial.println(F("Selftest ok!"));
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while (1) // Blink OK pattern!
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{
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digitalWrite(LED_PIN, HIGH);
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delay(200);
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digitalWrite(LED_PIN, LOW);
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delay(200);
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}
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}
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else
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{
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Serial.println(F("----> Selftest failed!"));
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while (1) // Blink FAILED pattern! Rappidly blinking..
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{
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}
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}
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}
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