).
)
/*
* This is an example showing a simple environment sensor based on a BME280 attached via I2C.
* This sketch was tested on a WeMos D1 mini
*/
#include <Adafruit_BME280.h>
#include <esp-knx-ip.h>
// WiFi config here
const char* ssid = "WLAN-Access";
const char* pass = "3017489092966120";
#define UPDATE_INTERVAL 10000 // This is the default send interval
unsigned long next_change = 0;
config_id_t temp_ga, hum_ga, pres_ga;
config_id_t hostname_id;
config_id_t temp_rate_id;
config_id_t enable_sending_id;
Adafruit_BME280 bme;
void setup() {
pinMode(BUILTIN_LED, OUTPUT);
Serial.begin(115200);
// Register the group addresses where to send information to and the other config
hostname_id = knx.config_register_string("Hostname", 20, String("env"));
enable_sending_id = knx.config_register_bool("Enable periodic sending", true);
temp_rate_id = knx.config_register_int("Send rate (ms)", UPDATE_INTERVAL, show_periodic_options);
temp_ga = knx.config_register_ga("Temperature", show_periodic_options);
hum_ga = knx.config_register_ga("Humidity", show_periodic_options);
pres_ga = knx.config_register_ga("Pressure", show_periodic_options);
knx.register_callback("Read Temperature", temp_cb);
knx.register_callback("Read Humidity", hum_cb);
knx.register_callback("Read Pressure", pres_cb);
// Load previous values from EEPROM
knx.load();
// Init sensor
if (!bme.begin(0x77)) {
Serial.println("Could not find a valid BME280 sensor, check wiring!");
}
// Init WiFi
WiFi.hostname(knx.config_get_string(hostname_id));
WiFi.begin(ssid, pass);
Serial.println("");
Serial.print("[Connecting]");
Serial.print(ssid);
digitalWrite(BUILTIN_LED, LOW);
while (WiFi.status() != WL_CONNECTED) {
digitalWrite(BUILTIN_LED, HIGH);
delay(500);
Serial.print(".");
digitalWrite(BUILTIN_LED, LOW);
}
digitalWrite(BUILTIN_LED, HIGH);
// Start knx
knx.start();
Serial.println();
Serial.println("Connected to wifi");
Serial.println(WiFi.localIP());
}
void loop() {
// Process knx events, e.g. webserver
knx.loop();
unsigned long now = millis();
if (knx.config_get_bool(enable_sending_id) && next_change < now)
{
next_change = now + knx.config_get_int(temp_rate_id);
Serial.print("T: ");
float temp = bme.readTemperature();
float hum = bme.readHumidity();
float pres = bme.readPressure()/100.0f;
Serial.print(temp);
Serial.print("°C H: ");
Serial.print(hum);
Serial.print("% P: ");
Serial.print(pres);
Serial.println("hPa");
knx.write2ByteFloat(knx.config_get_ga(temp_ga), temp);
knx.write2ByteFloat(knx.config_get_ga(hum_ga), hum);
knx.write2ByteFloat(knx.config_get_ga(pres_ga), pres);
}
delay(50);
}
// This is a enable condition function that is checked by the webui to figure out if some config options should be hidden
bool show_periodic_options()
{
return knx.config_get_bool(enable_sending_id);
}
void temp_cb(message_t const &msg, void *arg)
{
switch (msg.ct)
{
case KNX_CT_READ:
{
knx.answer2ByteFloat(msg.received_on, bme.readTemperature());
break;
}
}
}
void hum_cb(message_t const &msg, void *arg)
{
switch (msg.ct)
{
case KNX_CT_READ:
{
knx.answer2ByteFloat(msg.received_on, bme.readHumidity());
break;
}
}
}
void pres_cb(message_t const &msg, void *arg)
{
switch (msg.ct)
{
case KNX_CT_READ:
{
knx.answer2ByteFloat(msg.received_on, bme.readPressure()/100.0f);
break;
}
}
}
/*
* Copyright (C) 2017 Robert Bosch. All Rights Reserved.
*
* Disclaimer
*
* Common:
* Bosch Sensortec products are developed for the consumer goods industry. They may only be used
* within the parameters of the respective valid product data sheet. Bosch Sensortec products are
* provided with the express understanding that there is no warranty of fitness for a particular purpose.
* They are not fit for use in life-sustaining, safety or security sensitive systems or any system or device
* that may lead to bodily harm or property damage if the system or device malfunctions. In addition,
* Bosch Sensortec products are not fit for use in products which interact with motor vehicle systems.
* The resale and/or use of products are at the purchasers own risk and his own responsibility. The
* examination of fitness for the intended use is the sole responsibility of the Purchaser.
*
* The purchaser shall indemnify Bosch Sensortec from all third party claims, including any claims for
* incidental, or consequential damages, arising from any product use not covered by the parameters of
* the respective valid product data sheet or not approved by Bosch Sensortec and reimburse Bosch
* Sensortec for all costs in connection with such claims.
*
* The purchaser must monitor the market for the purchased products, particularly with regard to
* product safety and inform Bosch Sensortec without delay of all security relevant incidents.
*
* Engineering Samples are marked with an asterisk (*) or (e). Samples may vary from the valid
* technical specifications of the product series. They are therefore not intended or fit for resale to third
* parties or for use in end products. Their sole purpose is internal client testing. The testing of an
* engineering sample may in no way replace the testing of a product series. Bosch Sensortec
* assumes no liability for the use of engineering samples. By accepting the engineering samples, the
* Purchaser agrees to indemnify Bosch Sensortec from all claims arising from the use of engineering
* samples.
*
* Special:
* This software module (hereinafter called "Software") and any information on application-sheets
* (hereinafter called "Information") is provided free of charge for the sole purpose to support your
* application work. The Software and Information is subject to the following terms and conditions:
*
* The Software is specifically designed for the exclusive use for Bosch Sensortec products by
* personnel who have special experience and training. Do not use this Software if you do not have the
* proper experience or training.
*
* This Software package is provided `` as is `` and without any expressed or implied warranties,
* including without limitation, the implied warranties of merchantability and fitness for a particular
* purpose.
*
* Bosch Sensortec and their representatives and agents deny any liability for the functional impairment
* of this Software in terms of fitness, performance and safety. Bosch Sensortec and their
* representatives and agents shall not be liable for any direct or indirect damages or injury, except as
* otherwise stipulated in mandatory applicable law.
*
* The Information provided is believed to be accurate and reliable. Bosch Sensortec assumes no
* responsibility for the consequences of use of such Information nor for any infringement of patents or
* other rights of third parties which may result from its use. No license is granted by implication or
* otherwise under any patent or patent rights of Bosch. Specifications mentioned in the Information are
* subject to change without notice.
*
* It is not allowed to deliver the source code of the Software to any third party without permission of
* Bosch Sensortec.
*
*/
/*!
* @file _example.ino
*
* @brief
* Example for using of BSEC library in a fixed configuration with the BME680 sensor.
* This works by running an endless loop in the _loop() function.
*/
/*!
* @addtogroup bsec_examples BSEC Examples
* @brief BSEC usage examples
* @{*/
/**********************************************************************************************************************/
/* header files */
/**********************************************************************************************************************/
#include "bsec_integration.h"
#include <Wire.h>
/**********************************************************************************************************************/
/* functions */
/**********************************************************************************************************************/
/*!
* @brief Write operation in either Wire or SPI
*
* param[in] dev_addr Wire or SPI device address
* param[in] reg_addr register address
* param[in] reg_data_ptr pointer to the data to be written
* param[in] data_len number of bytes to be written
*
* @return result of the bus communication function
*/
int8_t bus_write(uint8_t dev_addr, uint8_t reg_addr, uint8_t *reg_data_ptr, uint16_t data_len)
{
Wire.beginTransmission(dev_addr);
Wire.write(reg_addr); /* Set register address to start writing to */
/* Write the data */
for (int index = 0; index < data_len; index++) {
Wire.write(reg_data_ptr[index]);
}
return (int8_t)Wire.endTransmission();
}
/*!
* @brief Read operation in either Wire or SPI
*
* param[in] dev_addr Wire or SPI device address
* param[in] reg_addr register address
* param[out] reg_data_ptr pointer to the memory to be used to store the read data
* param[in] data_len number of bytes to be read
*
* @return result of the bus communication function
*/
int8_t bus_read(uint8_t dev_addr, uint8_t reg_addr, uint8_t *reg_data_ptr, uint16_t data_len)
{
int8_t comResult = 0;
Wire.beginTransmission(dev_addr);
Wire.write(reg_addr); /* Set register address to start reading from */
comResult = Wire.endTransmission();
delayMicroseconds(150); /* Precautionary response delay */
Wire.requestFrom(dev_addr, (uint8_t)data_len); /* Request data */
int index = 0;
while (Wire.available()) /* The slave device may send less than requested (burst read) */
{
reg_data_ptr[index] = Wire.read();
index++;
}
return comResult;
}
/*!
* @brief System specific implementation of sleep function
*
* @param[in] t_ms time in milliseconds
*
* @return none
*/
void sleep(uint32_t t_ms)
{
delay(t_ms);
}
/*!
* @brief Capture the system time in microseconds
*
* @return system_current_time current system timestamp in microseconds
*/
int64_t get_timestamp_us()
{
return (int64_t) millis() * 1000;
}
/*!
* @brief Handling of the ready outputs
*
* @param[in] timestamp time in nanoseconds
* @param[in] iaq IAQ signal
* @param[in] iaq_accuracy accuracy of IAQ signal
* @param[in] temperature temperature signal
* @param[in] humidity humidity signal
* @param[in] pressure pressure signal
* @param[in] raw_temperature raw temperature signal
* @param[in] raw_humidity raw humidity signal
* @param[in] gas raw gas sensor signal
* @param[in] bsec_status value returned by the bsec_do_steps() call
*
* @return none
*/
void output_ready(int64_t timestamp, float iaq, uint8_t iaq_accuracy, float temperature, float humidity,
float pressure, float raw_temperature, float raw_humidity, float gas, bsec_library_return_t bsec_status)
{
Serial.print("[");
Serial.print(timestamp/1e6);
Serial.print("] T: ");
Serial.print(temperature);
Serial.print("| rH: ");
Serial.print(humidity);
Serial.print("| p: ");
Serial.print(pressure);
Serial.print("| Gas: ");
Serial.print(gas);
Serial.print("| IAQ: ");
Serial.print(iaq);
Serial.print(" (");
Serial.print(iaq_accuracy);
Serial.println(")");
}
/*!
* @brief Load previous library state from non-volatile memory
*
* @param[in,out] state_buffer buffer to hold the loaded state string
* @param[in] n_buffer size of the allocated state buffer
*
* @return number of bytes copied to state_buffer
*/
uint32_t state_load(uint8_t *state_buffer, uint32_t n_buffer)
{
// ...
// Load a previous library state from non-volatile memory, if available.
//
// Return zero if loading was unsuccessful or no state was available,
// otherwise return length of loaded state string.
// ...
return 0;
}
/*!
* @brief Save library state to non-volatile memory
*
* @param[in] state_buffer buffer holding the state to be stored
* @param[in] length length of the state string to be stored
*
* @return none
*/
void state_save(const uint8_t *state_buffer, uint32_t length)
{
// ...
// Save the string some form of non-volatile memory, if possible.
// ...
}
/*!
* @brief Load library config from non-volatile memory
*
* @param[in,out] config_buffer buffer to hold the loaded state string
* @param[in] n_buffer size of the allocated state buffer
*
* @return number of bytes copied to config_buffer
*/
uint32_t config_load(uint8_t *config_buffer, uint32_t n_buffer)
{
// ...
// Load a library config from non-volatile memory, if available.
//
// Return zero if loading was unsuccessful or no config was available,
// otherwise return length of loaded config string.
// ...
return 0;
}
/*!
* @brief Main function which configures BSEC library and then reads and processes the data from sensor based
* on timer ticks
*
* @return result of the processing
*/
void setup()
{
return_values_init ret;
/* Init I2C and serial communication */
Wire.begin();
Serial.begin(115200);
/* Call to the function which initializes the BSEC library
* Switch on low-power mode and provide no temperature offset */
ret = _init(BSEC_SAMPLE_RATE_LP, 5.0f, bus_write, bus_read, sleep, state_load, config_load);
if (ret.bme680_status)
{
/* Could not intialize BME680 */
Serial.println("Error while initializing BME680");
return;
}
else if (ret.bsec_status)
{
/* Could not intialize BSEC library */
Serial.println("Error while initializing BSEC library");
return;
}
/* Call to endless loop function which reads and processes data based on sensor settings */
/* State is saved every 10.000 samples, which means every 10.000 * 3 secs = 500 minutes */
_loop(sleep, get_timestamp_us, output_ready, state_save, 10000);
}
void loop()
{
}
/*! @}*/
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