v3_firmware/firmware/firmware.ino

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#include <Arduino.h>
#include <avr/sleep.h>
#include <avr/interrupt.h>
#include <SPI.h>
#include <Wire.h>
// Use the local config.h for LMIC Configuration
#define ARDUINO_LMIC_PROJECT_CONFIG_H config.h
#include <lmic.h>
#include <hal/hal.h>
#include "config.h"
#ifdef HAS_BME280
#include "BME280.h"
BME280 sensor;
#endif
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#ifdef HAS_SHT21
#include "SHT21.h"
SHT21 sensor;
#endif
// Define some LMIC Callbacks and Variables
void os_getArtEui (u1_t* buf) {
memcpy_P(buf, APPEUI, 8);
}
void os_getDevEui (u1_t* buf) {
memcpy_P(buf, DEVEUI, 8);
}
void os_getDevKey (u1_t* buf) {
memcpy_P(buf, APPKEY, 16);
}
static osjob_t sendjob;
// Pin-Mapping for ATTNode v3
const lmic_pinmap lmic_pins = {
.nss = PIN_PA5,
.rxtx = LMIC_UNUSED_PIN,
.rst = LMIC_UNUSED_PIN,
.dio = {PIN_PA4, PIN_PA6, LMIC_UNUSED_PIN},
};
// List of unused Pins - will be disabled for Power Saving
const int disabledPins[] = {PIN_PB5, PIN_PB4, PIN_PB3, PIN_PB2, PIN_PB1, PIN_PB0, PIN_PC3, PIN_PC2, PIN_PC1, PIN_PC0};
// ISR Routine for Sleep
ISR(RTC_PIT_vect)
{
/* Clear interrupt flag by writing '1' (required) */
RTC.PITINTFLAGS = RTC_PI_bm;
}
// Sleep Routine
void sleep_32s() {
cli();
while (RTC.PITSTATUS > 0) {}
RTC.PITINTCTRL = RTC_PI_bm;
// 32 Sekunden
RTC.PITCTRLA = RTC_PERIOD_CYC32768_gc | RTC_PITEN_bm;
while (RTC.PITSTATUS & RTC_CTRLBUSY_bm) {}
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
sleep_enable();
sei();
sleep_cpu();
sleep_disable();
sei();
}
// LMIC Callback Handling
void onEvent(ev_t ev) {
switch (ev) {
case EV_JOINED:
// Disable LinkCheck
LMIC_setLinkCheckMode(0);
break;
case EV_TXCOMPLETE:
// Schedule Next Transmit
do_send(&sendjob);
// Got to sleep for specified Time
for (int i = 0; i < int(SLEEP_TIME*2); i++)
sleep_32s();
break;
}
}
// Get Battery Voltage
uint16_t readSupplyVoltage() { //returns value in millivolts to avoid floating point
uint16_t temp = 0;
analogReference(VDD);
VREF.CTRLA = VREF_ADC0REFSEL_1V5_gc;
ADC0.CTRLD = ADC_INITDLY_DLY256_gc;
ADC0_CTRLB = ADC_SAMPNUM_ACC64_gc;
uint16_t reading = analogRead(ADC_INTREF);
temp = reading / 64;
uint32_t intermediate = 1534500;
reading = 0;
reading = intermediate / temp;
return reading;
}
// Blink x times
#ifdef LED_PIN
void blink(uint8_t num) {
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, 0);
for (uint8_t i = 0; i < num * 2; i++) {
digitalWrite(LED_PIN, !digitalRead(LED_PIN));
delay(5);
}
digitalWrite(LED_PIN, 0);
}
#endif
// Read Sensors and Send Data
// All Sensor Code and Data Preparation goes here
void do_send(osjob_t* j) {
// Prepare LoRa Data Packet
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#ifdef HAS_NO_SENSOR
struct lora_data {
uint8_t bat;
} __attribute ((packed)) data;
#elif defined HAS_SHT21
struct lora_data {
uint8_t bat;
int32_t temperature;
int32_t humidity;
} __attribute__ ((packed)) data;
#elif defined HAS_BME280
struct lora_data {
uint8_t bat;
int32_t temperature;
int32_t humidity;
int32_t pressure;
} __attribute__ ((packed)) data;
#endif
if (LMIC.opmode & OP_TXRXPEND) {
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delay(1);
} else {
// Add Battery Voltage (0.2V Accuracy stored in 1 byte)
uint32_t batv = readSupplyVoltage();
data.bat = (uint8_t)(batv / 20);
if (batv % 20 > 9)
data.bat += 1;
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// Take Measurements depending on Sensor
#ifdef HAS_SHT21
data.temperature = (int32_t)(sensor.getTemperature()*100);
data.humidity = (int32_t)(sensor.getHumidity()*100);
#elif defined HAS_BME280
sensor.getData(&data.temperature, &data.pressure, &data.humidity);
#endif
// Queue Paket for Sending
LMIC_setTxData2(1, (unsigned char *)&data, sizeof(data), 0);
}
}
void setup()
{
// Initialize SPI and I2C
Wire.begin();
SPI.begin();
// Disable unused Pins (for power saving)
for (int i = 0; i < (sizeof(disabledPins) / sizeof(disabledPins[0])) - 1; i++)
pinMode(disabledPins[i], INPUT_PULLUP);
// Set RTC
while (RTC.STATUS > 0) {}
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RTC.CLKSEL = RTC_CLKSEL_INT1K_gc;
while (RTC.PITSTATUS > 0) {}
// Initialize Sensor(s)
#ifdef HAS_BME280
sensor.getCalData();
#endif
// Setup LMIC
os_init();
LMIC_reset(); // Reset LMIC state and cancel all queued transmissions
LMIC_setClockError(MAX_CLOCK_ERROR * 1 / 100); // Compensate for Clock Skew
LMIC.dn2Dr = DR_SF9; // Downlink Band
LMIC_setDrTxpow(DR_SF7, 14); // Default to SF7
// Schedule First Send (Triggers OTAA Join as well)
do_send(&sendjob);
#ifdef LED_PIN
pinMode(LED_PIN, OUTPUT);
blink(1);
#endif
}
void loop()
{
// Only Run the LMIC loop here. Actual Sending Code is in do_send()
os_runloop_once();
}