pdbayes
commented
1 year ago Here is the code.
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_Sensor.h>
#include "Adafruit_BME680.h"
/*#define BME_SCK 18
#define BME_MISO 19
#define BME_MOSI 23
#define BME_CS 5*/
#define SEALEVELPRESSURE_HPA (1013.25)
Adafruit_BME680 bme; // I2C
//Adafruit_BME680 bme(BME_CS); // hardware SPI
//Adafruit_BME680 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK);
typedef enum response_codes
{
EL_OK, EL_OVERFLOW, EL_PARSE_ERROR, EL_COMMAND_NOT_FOUND, EL_PARAMETER_ERROR,
EL_INVALID_ESCAPE, EL_NO_CONNECTION, EL_TOPIC_OUT_OF_RANGE, EL_TOPIC_UNDEFINED,
EL_INVALID_KEY_LENGTH, EL_INVALID_KEY_NAME, EL_UNKNOWN_KEY, EL_KEY_READONLY,
EL_KEY_WRITEONLY, EL_UNABLE_TO_CONNECT, EL_TIME_NOT_AVAILABLE, EL_LOCATION_NOT_AVAILABLE,
EL_MODE_NOT_AVAILABLE, EL_ACTIVE_CONNECTION, EL_HOST_IMAGE_NOT_AVAILABLE, EL_INVALID_ADDRESS,
EL_INVALID_OTA_UPDATE, EL_INVALID_QUERY, EL_INVALID_SIGNATURE
}response_codes_t;
// Send a command and retrieve the response
String SendCommand(String command)
{
Serial.print(command+"\n");
String response = Serial.readString();
return response;
}
// Get the response code from the begining of an ExpressLink response
response_codes_t checkResponse(String response)
{
if(response.indexOf("OK")!= -1) return EL_OK;
int errPosition = response.indexOf("ERR");
response_codes_t errCode = (response_codes_t) response.substring(3).toInt();
return errCode;
}
void expressLinkConnect()
{
String response;
bool finished = false;
response = SendCommand("AT+CONNECT?");
if(response.indexOf("OK 1")==-1)
{
Serial.println("Connecting ExpressLink");
do{
response = SendCommand("AT+CONNECT");
if(checkResponse(response) == EL_OK)
{
finished = true;
}
else
{
Serial.println(response);
}
}while(!finished);
Serial.println("Connected to ExpressLink");
}
}
void setup() {
Serial.begin(115200);
Wire.begin();
SendCommand("AT+CONF Topic1=Weather");
Serial.println(F("BME680 async test"));
if (!bme.begin()) {
Serial.println(F("Could not find a valid BME680 sensor, check wiring!"));
while (1);
}
// Set up oversampling and filter initialization
bme.setTemperatureOversampling(BME680_OS_8X);
bme.setHumidityOversampling(BME680_OS_2X);
bme.setPressureOversampling(BME680_OS_4X);
bme.setIIRFilterSize(BME680_FILTER_SIZE_3);
bme.setGasHeater(320, 150); // 320*C for 150 ms
}
void loop() {
expressLinkConnect();
if (! bme.performReading()) {
Serial.println("Failed to perform reading :(");
return;
}
Serial.print(F("Temperature = "));
Serial.print(bme.temperature);
Serial.println(F(" *C"));
Serial.print(F("Pressure = "));
Serial.print(bme.pressure / 100.0);
Serial.println(F(" hPa"));
Serial.print(F("Humidity = "));
Serial.print(bme.humidity);
Serial.println(F(" %"));
String Temperature = String(bme.temperature);
Serial.print(F("Gas = "));
Serial.print(bme.gas_resistance / 1000.0);
Serial.println(F(" KOhms"));
Serial.print(F("Approx. Altitude = "));
Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA));
Serial.println(F(" m"));
Serial.println();
float temperatureInC = bme.temperature;
float pressureHpa = bme.pressure / 100.0;
float relativeHumidity = bme.humidity;
float gasResistance = bme.gas_resistance / 1000.0;
float dewPoint = dewPointFast(bme.temperature, bme.humidity);
float cloudBase = (((bme.temperature - dewPoint)/2.5) *1000) + 100;
expressLinkConnect();
Serial.print("AT+SEND1 {\"temperatureInC\":");
Serial.print(temperatureInC);
Serial.print(",\"humidityPercentage\":");
Serial.print(relativeHumidity);
Serial.print(",\"pressureHpa\":");
Serial.print(pressureHpa);
Serial.print(",\"gasResistance\":");
Serial.print(gasResistance);
Serial.print(",\"dewPoint1\":");
Serial.print(dewPoint);
Serial.print(",\"cloudBase1\":");
Serial.print(cloudBase);
Serial.println("}");
delay(10000);
}
float dewPointFast(float celsius, float humidity)
{
float a = 17.271;
float b = 237.7;
float temp = (a * celsius) / (b + celsius) + log(humidity*0.01);
float Td = (b * temp) / (a - temp);
return Td;
}
caternuson
Hi. I have been using this library with both an esp32 and an Arduino uno. I switched from the esp as it kept locking up and had to be reset every few days. I am now using an Arduino Uno and it stops getting readings after about an hour. I had it running connected by usb to a pc and when I started the serial monitor it ran the setup routine and started working, so debugging is tricky. I changed to a 12v PSU but have the same result. I have swapped from begin reading to perform reading, still the same. I also changed from the Arduino doing the WiFi and connection to AWS IoT to using an Espressif Expresslink board to do that part. I am using the example code from here but with added serial communication to the Espressif board. Any ideas?