commit 19ca511a53dbd8ffea3160ca0730b988226cf689 Author: Wolfgang Hottgenroth Date: Fri Jan 19 10:53:02 2024 +0100 initial diff --git a/LoRa32-CO2-Meter.ino b/LoRa32-CO2-Meter.ino new file mode 100644 index 0000000..320d912 --- /dev/null +++ b/LoRa32-CO2-Meter.ino @@ -0,0 +1,310 @@ +#include "LoRaWan_APP.h" +#include +#include "HT_SSD1306Wire.h" +#include +#include + +extern SSD1306Wire display; + +Adafruit_NeoPixel pixels(1, 45, NEO_RGB + NEO_KHZ400); + +/* OTAA para*/ +uint8_t devEui[] = { 0x70, 0xB3, 0xD5, 0x7E, 0xD0, 0x06, 0x44, 0xF0 }; +uint8_t appEui[] = { 0xa0, 0x57, 0x81, 0x00, 0x01, 0x12, 0xaa, 0xf4 }; +uint8_t appKey[] = { 0x88, 0x88, 0x81, 0x88, 0x89, 0x88, 0x88, 0xa8, 0x88, 0x68, 0x88, 0x85, 0x88, 0x80, 0x66, 0x01 }; + + +/* ABP para*/ +uint8_t nwkSKey[] = { 0x15, 0xb1, 0xd0, 0xef, 0xa4, 0x63, 0xdf, 0xbe, 0x3d, 0x11, 0x18, 0x1e, 0x1e, 0xc7, 0xda,0x85 }; +uint8_t appSKey[] = { 0xd7, 0x2c, 0x78, 0x75, 0x8c, 0xdc, 0xca, 0xbf, 0x55, 0xee, 0x4a, 0x77, 0x8d, 0x16, 0xef,0x67 }; +uint32_t devAddr = ( uint32_t )0x007e6ae1; + +/*LoraWan channelsmask, default channels 0-7*/ +uint16_t userChannelsMask[6]={ 0x00FF,0x0000,0x0000,0x0000,0x0000,0x0000 }; + +/*LoraWan region, select in arduino IDE tools*/ +LoRaMacRegion_t loraWanRegion = ACTIVE_REGION; + +/*LoraWan Class, Class A and Class C are supported*/ +DeviceClass_t loraWanClass = CLASS_C; + +/*the application data transmission duty cycle. value in [ms].*/ +uint32_t appTxDutyCycle = 60000; + +/*OTAA or ABP*/ +bool overTheAirActivation = true; + +/*ADR enable*/ +bool loraWanAdr = true; + +/* Indicates if the node is sending confirmed or unconfirmed messages */ +bool isTxConfirmed = true; + +/* Application port */ +uint8_t appPort = 2; +/*! +* Number of trials to transmit the frame, if the LoRaMAC layer did not +* receive an acknowledgment. The MAC performs a datarate adaptation, +* according to the LoRaWAN Specification V1.0.2, chapter 18.4, according +* to the following table: +* +* Transmission nb | Data Rate +* ----------------|----------- +* 1 (first) | DR +* 2 | DR +* 3 | max(DR-1,0) +* 4 | max(DR-1,0) +* 5 | max(DR-2,0) +* 6 | max(DR-2,0) +* 7 | max(DR-3,0) +* 8 | max(DR-3,0) +* +* Note, that if NbTrials is set to 1 or 2, the MAC will not decrease +* the datarate, in case the LoRaMAC layer did not receive an acknowledgment +*/ +uint8_t confirmedNbTrials = 4; + +typedef enum { off_e, red_e, green_e, yellow_e, blue_e } color_t; + +static void led(color_t color) { + switch (color) { + case off_e: + pixels.setPixelColor(0, pixels.Color(0,0,0)); + break; + case red_e: + pixels.setPixelColor(0, pixels.Color(50,0,0)); + break; + case yellow_e: + pixels.setPixelColor(0, pixels.Color(50,50,0)); + break; + case green_e: + pixels.setPixelColor(0, pixels.Color(0,50,0)); + break; + case blue_e: + pixels.setPixelColor(0, pixels.Color(0,0,50)); + break; + } + pixels.show(); +} + +static void printDisplay(float co2con, float temp, float hum, unsigned long restTime, bool calibrationRunning) { + display.clear(); + + char dispbuf[128]; + sprintf(dispbuf, "%.0f ppm CO2", co2con); + display.drawString(1, 0, dispbuf); + sprintf(dispbuf, "%.0f °C", temp); + display.drawString(1, 17, dispbuf); + + if (calibrationRunning) { + sprintf(dispbuf, "Calib. in %d s", restTime); + display.drawString(1, 34, dispbuf); + } else { + sprintf(dispbuf, "%.0f %%H", hum); + display.drawString(1, 34, dispbuf); + + } + display.display(); +} + + +SensirionI2cScd30 sensor; + +static char errorMessage[128]; +static int16_t error; +static int calibrationMode; +static unsigned long calibrationStartTime; + + +/* Prepares the payload of the frame */ +static void prepareTxFrame( uint8_t port ) +{ + /*appData size is LORAWAN_APP_DATA_MAX_SIZE which is defined in "commissioning.h". + *appDataSize max value is LORAWAN_APP_DATA_MAX_SIZE. + *if enabled AT, don't modify LORAWAN_APP_DATA_MAX_SIZE, it may cause system hanging or failure. + *if disabled AT, LORAWAN_APP_DATA_MAX_SIZE can be modified, the max value is reference to lorawan region and SF. + *for example, if use REGION_CN470, + *the max value for different DR can be found in MaxPayloadOfDatarateCN470 refer to DataratesCN470 and BandwidthsCN470 in "RegionCN470.h". + */ + + struct __attribute__((__packed__)) { + uint8_t status; + int32_t co2con; + int32_t temp; + int32_t hum; + } values; + float co2con = 0.0; + float temp = 0.0; + float hum = 0.0; + int16_t error = sensor.blockingReadMeasurementData(co2con, temp, hum); + if (error != NO_ERROR) { + values.status = 0; + values.co2con = 0; + values.temp = 0; + values.hum = 0; + } else { + values.status = 1; + values.co2con = co2con * 100; + values.temp = temp * 100; + values.hum = hum * 100; + } + Serial.print("status: "); + Serial.print(values.status); + Serial.print("\t"); + Serial.print("co2Concentration: "); + Serial.print(co2con); + Serial.print("\t"); + Serial.print("temperature: "); + Serial.print(temp); + Serial.print("\t"); + Serial.print("humidity: "); + Serial.print(hum); + Serial.println(); + + appDataSize = sizeof(values); + memcpy(appData, &values, sizeof(values)); + + + long waitTimeForCalibration = 0; + if (calibrationMode == LOW) { + waitTimeForCalibration = (60 * 10) - ((millis() - calibrationStartTime) / 1000); + if (waitTimeForCalibration <= 0) { + Serial.println("Execute calibration now"); + error = sensor.forceRecalibration(400); + if (error != NO_ERROR) { + Serial.print("Error trying to execute forceRecalibration(): "); + errorToString(error, errorMessage, sizeof errorMessage); + Serial.println(errorMessage); + } + calibrationMode = HIGH; + led(off_e); + } else { + Serial.print("Waiting for calibration: "); + Serial.print(waitTimeForCalibration); + Serial.println(); + } + } + + if (calibrationMode == HIGH) { + if (co2con < 1100) { + led(green_e); + } else if (co2con < 2000) { + led(yellow_e); + } else { + led(red_e); + } + } + + printDisplay(co2con, temp, hum, waitTimeForCalibration, (calibrationMode == LOW)); +} + +//if true, next uplink will add MOTE_MAC_DEVICE_TIME_REQ + + +void setup() { + Serial.begin(115200); + + digitalWrite(Vext,LOW); + display.init(); + display.setFont(ArialMT_Plain_16); + display.clear(); + display.display(); + + display.drawString(1, 0, "Start up"); + display.display(); + + pixels.begin(); + pixels.setPixelColor(0, pixels.Color(0,0,0)); + led(off_e); + + pinMode(46, INPUT_PULLUP); + calibrationMode = digitalRead(46); + if (calibrationMode == LOW) { + calibrationStartTime = millis(); + led(blue_e); + } else { + led(off_e); + } + + Wire1.begin(41, 42, 10000); + //sensor.begin(Wire, SCD30_I2C_ADDR_61); + sensor.begin(Wire1, 0x61); + + sensor.stopPeriodicMeasurement(); + + delay(2000); + sensor.softReset(); + + delay(2000); + uint8_t major = 0; + uint8_t minor = 0; + error = sensor.readFirmwareVersion(major, minor); + if (error != NO_ERROR) { + Serial.print("Error trying to execute readFirmwareVersion(): "); + errorToString(error, errorMessage, sizeof errorMessage); + Serial.println(errorMessage); + } else { + Serial.print("firmware version major: "); + Serial.print(major); + Serial.print("\t"); + Serial.print("minor: "); + Serial.print(minor); + Serial.println(); + } + + error = sensor.startPeriodicMeasurement(0); + if (error != NO_ERROR) { + Serial.print("Error trying to execute startPeriodicMeasurement(): "); + errorToString(error, errorMessage, sizeof errorMessage); + Serial.println(errorMessage); + } + + + Mcu.begin(); + deviceState = DEVICE_STATE_INIT; +} + +void loop() +{ + switch( deviceState ) + { + case DEVICE_STATE_INIT: + { +#if(LORAWAN_DEVEUI_AUTO) + LoRaWAN.generateDeveuiByChipID(); +#endif + LoRaWAN.init(loraWanClass,loraWanRegion); + break; + } + case DEVICE_STATE_JOIN: + { + LoRaWAN.join(); + break; + } + case DEVICE_STATE_SEND: + { + prepareTxFrame( appPort ); + LoRaWAN.send(); + deviceState = DEVICE_STATE_CYCLE; + break; + } + case DEVICE_STATE_CYCLE: + { + // Schedule next packet transmission + txDutyCycleTime = appTxDutyCycle + randr( -APP_TX_DUTYCYCLE_RND, APP_TX_DUTYCYCLE_RND ); + LoRaWAN.cycle(txDutyCycleTime); + deviceState = DEVICE_STATE_SLEEP; + break; + } + case DEVICE_STATE_SLEEP: + { + LoRaWAN.sleep(loraWanClass); + break; + } + default: + { + deviceState = DEVICE_STATE_INIT; + break; + } + } +}