Hello everyone,
I am trying to use a BME680 with this library : https://github.com/BoschSensortec/BME680_driver
I don't want to use an other one because this library doesn't use arduino.h and I would like to use this code for an other MCU.
So the code detect if a sensor is plug. But when I am reading I have the value 0 so everything should be OK but the measure don't move they are fix.
here is my code hope someone could help me :
#include <Wire.h>
#include"bme680.h"
//#define BME680_DEBUG
struct bme680_dev gas_sensor;
int8_t user_i2c_read (uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len){
int result=0;
Wire.beginTransmission(dev_id);
Wire.write(reg_addr); // Accès au registre
Wire.endTransmission(false);
Wire.requestFrom(dev_id, len);
if (len<=Wire.available()){
for(int i=0;i<len;i++){
data[i] = Wire.read();
}
}else{
result=5;
}
return result;
}
/**
* Write the content into the register targeted register for a specified device
*
* Parameter :
* dev_id : the I2C adress of the device
* reg_addr : the adresse of the targeted register
* *data : pointer to the data to write
* len : number in byte of the data
*
* Return: Error code
*/
int8_t user_i2c_write (uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len){
int result=0;
Wire.beginTransmission(dev_id);
Wire.write(reg_addr);
for(int i=0;i<len;i++){
Wire.write(data[i]);
}
Wire.endTransmission();
return result;
}
/**
* function to wait the time
*
* Parameter :
* period : time that will be waited in millisecond
*/
void user_delay_ms (uint32_t period){
delay(period);
}
int8_t rslt = BME680_OK;
void init_bme (void)
{
uint8_t set_required_settings;
/* Set the temperature, pressure and humidity settings */
gas_sensor.tph_sett.os_hum = BME680_OS_2X;
gas_sensor.tph_sett.os_pres = BME680_OS_4X;
gas_sensor.tph_sett.os_temp = BME680_OS_8X;
gas_sensor.tph_sett.filter = BME680_FILTER_SIZE_3;
/* Set the remaining gas sensor settings and link the heating profile */
gas_sensor.gas_sett.run_gas = BME680_ENABLE_GAS_MEAS;
/* Create a ramp heat waveform in 3 steps */
gas_sensor.gas_sett.heatr_temp = 320; /* degree Celsius */
gas_sensor.gas_sett.heatr_dur = 150; /* milliseconds */
/* Select the power mode */
/* Must be set before writing the sensor configuration */
gas_sensor.power_mode = BME680_FORCED_MODE;
/* Set the required sensor settings needed */
set_required_settings = BME680_OST_SEL | BME680_OSP_SEL | BME680_OSH_SEL | BME680_FILTER_SEL
| BME680_GAS_SENSOR_SEL;
/* Set the desired sensor configuration */
rslt = bme680_set_sensor_settings(set_required_settings,&gas_sensor);
/* Set the power mode */
rslt = bme680_set_sensor_mode(&gas_sensor);
}
void setup() {
Serial.begin(9600);
init_bme();
gas_sensor.dev_id = BME680_I2C_ADDR_SECONDARY;
gas_sensor.intf = BME680_I2C_INTF;
gas_sensor.read = user_i2c_read;
gas_sensor.write = user_i2c_write;
gas_sensor.delay_ms = user_delay_ms;
/* amb_temp can be set to 25 prior to configuring the gas sensor
* or by performing a few temperature readings without operating the gas sensor.
*/
gas_sensor.amb_temp = 25;
Wire.begin();
rslt = bme680_init(&gas_sensor);
Serial.println(rslt);
}
void loop() {
// put your main code here, to run repeatedly:
uint16_t meas_period = 10000 ;
bme680_get_profile_dur(&meas_period, &gas_sensor);
struct bme680_field_data data;
while(1){
delay(meas_period);
rslt = bme680_get_sensor_data(&data, &gas_sensor);
Serial.println(rslt);
Serial.print ("T : ");
Serial.print(data.temperature / 100.0);
Serial.print ("P : ");
Serial.print(data.pressure / 100.0);
Serial.print ("H :");
Serial.println(data.humidity / 1000.0);
/* Avoid using measurements from an unstable heating setup */
if (data.status & BME680_GASM_VALID_MSK)
{
Serial.print("G: ");
Serial.print(data.gas_resistance);
Serial.println("Kohms");
}
/* Trigger the next measurement if you would like to read data out continuously */
if (gas_sensor.power_mode == BME680_FORCED_MODE) {
rslt = bme680_set_sensor_mode(&gas_sensor);
}
}
}
