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arduino-bsec-wifi.ino
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arduino-bsec-wifi.ino
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/**
* Copyright (C) 2021 Bosch Sensortec GmbH
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
/* If compiling this examples leads to an 'undefined reference error', refer to the README
* at https://github.com/BoschSensortec/Bosch-BSEC2-Library
*/
/* The new sensor needs to be conditioned before the example can work reliably. You may run this
* example for 24hrs to let the sensor stabilize.
*/
/**
* basic_config_state.ino sketch :
* This is an example for integration of BSEC2x library using configuration setting and has been
* tested with Adafruit ESP8266 Board
*
* For quick integration test, example code can be used with configuration file under folder
* Bosch_BSEC2_Library/src/config/FieldAir_HandSanitizer (Configuration file added as simple
* code example for integration but not optimized on classification performance)
* Config string for H2S and NonH2S target classes is also kept for reference (Suitable for
* lab-based characterization of the sensor)
*/
/* Use the Espressif EEPROM library. Skip otherwise */
#if defined(ARDUINO_ARCH_ESP32) || (ARDUINO_ARCH_ESP8266) || (ARDUINO_PICO_MAJOR)
#include <EEPROM.h>
#define USE_EEPROM
#endif
#include <WiFi.h>
#include <WiFiClass.h>
#include <WiFiClientSecure.h>
#include <HTTPClient.h>
#include <ArduinoOTA.h>
/* oled screen stuff */
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 32 // OLED display height, in pixels
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
// The pins for I2C are defined by the Wire-library.
// On an arduino UNO: A4(SDA), A5(SCL)
// On an arduino MEGA 2560: 20(SDA), 21(SCL)
// On an arduino LEONARDO: 2(SDA), 3(SCL), ...
#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
bool hasDisplay = false;
/* end oled screen stuff */
bool hasSerial = false;
bool wifiApMode = false;
// Enter your WiFi SSID and password
#include "secrets.h"
#include "settings.h"
int status = WL_IDLE_STATUS;
#include <bsec2.h>
/* Configuration for two class classification used here
* For four class classification please use configuration under config/FieldAir_HandSanitizer_Onion_Cinnamon
*/
#include "config/FieldAir_HandSanitizer/FieldAir_HandSanitizer.h"
/* Macros used */
#define STATE_SAVE_PERIOD UINT32_C(360 * 60 * 1000) /* 360 minutes - 4 times a day */
#define PANIC_LED LED_BUILTIN
#define ERROR_DUR 1000
/* Helper functions declarations */
/**
* Display a spinner in the top right of the display
*/
void spin(void);
/**
* @brief : This function toggles the led continuously with one second delay
*/
void errLeds(int, int);
/**
* Print the status of the wifi connection to serial
*/
void printWifiStatus(void);
/**
* @brief : This function checks the BSEC status, prints the respective error code. Halts in case of error
* @param[in] bsec : Bsec2 class object
*/
void checkBsecStatus(Bsec2 bsec);
/**
* @brief : This function updates/saves BSEC state
* @param[in] bsec : Bsec2 class object
*/
void updateBsecState(Bsec2 bsec);
/**
* Display the latest measurement data along with wifi status
*/
void updateDisplay(void);
void commitLast(void);
/**
* Process an HTTP request if there is one pending
*/
bool processOneRequest(WiFiClient&);
/**
* @brief : This function is called by the BSEC library when a new output is available
* @param[in] input : BME68X sensor data before processing
* @param[in] outputs : Processed BSEC BSEC output data
* @param[in] bsec : Instance of BSEC2 calling the callback
*/
void newDataCallback(const bme68xData data, const bsecOutputs outputs, Bsec2 bsec);
/**
* @brief : This function retrieves the existing state
* @param : Bsec2 class object
*/
bool loadState(Bsec2 bsec);
/**
* @brief : This function writes the state into EEPROM
* @param : Bsec2 class object
*/
bool saveState(Bsec2 bsec);
/**
* @brief : This function wipes the state stored in EEPROM
*/
bool wipeState(void);
/* Create an object of the class Bsec2 */
Bsec2 envSensor;
#ifdef USE_EEPROM
static uint8_t bsecState[BSEC_MAX_STATE_BLOB_SIZE];
#endif
/* Gas estimate names will be according to the configuration classes used */
const String gasName[] = { "Field Air", "Hand sanitizer", "Undefined 3", "Undefined 4"};
/**
* Battery measurement support!
* Mostly taken directly from https://github.com/raspberrypi/pico-examples/pull/326
* Seems to work even within an HTTP request handler!
*/
#include "pico/cyw43_arch.h"
#include "hardware/gpio.h"
#include "hardware/adc.h"
#include "pico/cyw43_arch/arch_threadsafe_background.h" //to get access to void cyw43_thread_enter(void); and void cyw43_thread_exit(void);
#ifndef CYW43_WL_GPIO2
#define CYW43_WL_GPIO2 2 //this is not defined in pico_w.h
#endif
const float VSYS_CONVERSION_FACTOR = 3 * 3.3f / (1 << 12);
//Set GPIO29 back to settings for wifi usage (shared pin with ADC3, so settings are changed when activating ADC3)
void SetGPIO29WifiStatus(){
gpio_set_function(29, GPIO_FUNC_PIO1); //7
gpio_pull_down(29);
gpio_set_slew_rate(29, GPIO_SLEW_RATE_FAST); //1
gpio_set_drive_strength(29, GPIO_DRIVE_STRENGTH_12MA); //3
}
float measureVsys(){
//WL_GPIO2, IP VBUS sense - high if VBUS is present, else low
uint vbus = cyw43_arch_gpio_get(CYW43_WL_GPIO2);
if(vbus == 0){
// low, on battery, measure voltage
print("on battery!");
} else {
print("on USB!");
}
// first let's prevent the wifi background thread from processing...
cyw43_thread_enter();
//initialize and select ADC3/GPIO29
adc_gpio_init(29);
adc_select_input(3);
//Read ADC3, result is 1/3 of VSYS, so we still need to multiply the conversion factor with 3 to get the input voltage
uint16_t adc3 = adc_read();
float vsys = adc3 * VSYS_CONVERSION_FACTOR;
// return gp29 to its previous state
SetGPIO29WifiStatus();
cyw43_thread_exit();
return vsys;
}
/**
* End battery measurement code
*/
WiFiServer server(80);
#ifdef TLS
#include <WiFiServerSecure.h>
WiFiServerSecure tlsserver(443);
ServerSessions serverCache(5);
#endif
String currentSsid = ssid;
String currentPass = pass;
String metricLocation = defaultMetricLocation;
void print(String val){
if(hasSerial){
Serial.print(val);
}
}
void println(String val){
print(val+"\n");
}
void connectToWifi(){
// attempt to connect to Wifi network:
println("Attempting to connect to SSID: "+currentSsid+" with password: "+currentPass);
unsigned long startTime = millis();
WiFi.begin(currentSsid.c_str(), currentPass.c_str());
wifiApMode = false;
bool wifiFallback = false;
while (WiFi.status() != WL_CONNECTED) {
unsigned int stat = WiFi.status();
spin();
delay(500);
print(".");
print(String(WiFi.status()));
if(hasDisplay){
display.print(".");
display.display();
}
if(millis() - startTime > connectionTimeout && wifiFallback){
wifiApMode = true;
currentSsid = apSSID;
WiFi.beginAP(currentSsid.c_str());
break;
} else if(millis() - startTime > connectionTimeout && stat == WL_CONNECT_FAILED){
wifiFallback = true;
println(String("\nFalling back to header-defined defaults, SSID: ")+ssid+" and password: "+pass);
WiFi.begin(ssid, pass);
}
}
// set the RTC using NTP
NTP.begin("pool.ntp.org", "time.nist.gov");
NTP.waitSet();
time_t now = time(nullptr);
struct tm timeinfo;
gmtime_r(&now, &timeinfo);
print("Current time: ");
print(asctime(&timeinfo));
char buf[20];
ltoa(now, buf, 10);
println(String(" (") + buf + ")");
}
typedef struct
{
unsigned long timestamp;
float raw_temp;
float raw_pressure;
float raw_humidity;
float raw_gas;
float raw_gas_index;
float comp_temp;
float comp_temp_c;
float comp_humidity;
float run_in_status;
float stabilization_status;
float gas_estimate_1;
float gas_estimate_2;
float gas_estimate_3;
float gas_estimate_4;
float air_quality;
int air_quality_accuracy;
float static_air_quality;
int static_air_quality_accuracy;
float eco2;
int eco2_accuracy;
float voc;
int voc_accuracy;
} bsec_outputs_t;
bsec_outputs_t lastOutput;
bsec_outputs_t committedOutput;
#include "request.h"
String td_s(String in){
return "<td>"+in+"</td>";
}
String ftd(float in){
return "<td>"+String(in)+"</td>";
}
String itd(int in){
return "<td>"+String(in)+"</td>";
}
String ltd(long in){
return "<td>"+String(in)+"</td>";
}
Settings settings(hasSerial);
/* Entry point for the example */
void setup(void)
{
// power the bme board from GP22 to avoid 3v3 pin conflict
pinMode(22, OUTPUT);
digitalWrite(22, HIGH);
/* Desired subscription list of BSEC2 outputs */
bsecSensor sensorList[] = {
BSEC_OUTPUT_RAW_TEMPERATURE,
BSEC_OUTPUT_RAW_PRESSURE,
BSEC_OUTPUT_RAW_HUMIDITY,
BSEC_OUTPUT_RAW_GAS,
/*
BSEC_OUTPUT_RAW_GAS_INDEX,
*/
BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_TEMPERATURE,
BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_HUMIDITY,
BSEC_OUTPUT_RUN_IN_STATUS,
BSEC_OUTPUT_STABILIZATION_STATUS,
/*
BSEC_OUTPUT_GAS_ESTIMATE_1,
BSEC_OUTPUT_GAS_ESTIMATE_2,
BSEC_OUTPUT_GAS_ESTIMATE_3,
BSEC_OUTPUT_GAS_ESTIMATE_4,
*/
BSEC_OUTPUT_IAQ,
BSEC_OUTPUT_STATIC_IAQ,
BSEC_OUTPUT_CO2_EQUIVALENT,
BSEC_OUTPUT_BREATH_VOC_EQUIVALENT
};
Serial.begin(115200);
#ifdef USE_EEPROM
EEPROM.begin(BSEC_MAX_STATE_BLOB_SIZE + 1);
#endif
Wire.begin();
pinMode(PANIC_LED, OUTPUT);
// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
if(display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
//println(F("SSD1306 allocation successful"));
hasDisplay = true;
display.display();
display.clearDisplay();
delay(1000);
display.setTextSize(1); // Normal 1:1 pixel scale
display.setTextColor(SSD1306_WHITE); // Draw white text
display.setCursor(0,0); // Start at top-left corner
display.println(F("Connecting to SSID:"));
display.println(ssid);
display.display();
}
/* Valid for boards with USB-COM. Wait for 10 seconds until the port is open */
while (!Serial && millis() < 10000) delay(10);
if(Serial.availableForWrite()){
hasSerial = true;
settings.setHasSerial(true);
}
ArduinoOTA.onStart([]() {
String type;
if (ArduinoOTA.getCommand() == U_FLASH) {
type = "sketch";
} else { // U_FS
type = "filesystem";
}
// NOTE: if updating FS this would be the place to unmount FS using FS.end()
println("Start updating " + type);
});
ArduinoOTA.onEnd([]() {
println("\nEnd");
});
ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
if(hasSerial) Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
});
ArduinoOTA.onError([](ota_error_t error) {
if(hasSerial) Serial.printf("Error[%u]: ", error);
if (error == OTA_AUTH_ERROR) {
println("Auth Failed");
} else if (error == OTA_BEGIN_ERROR) {
println("Begin Failed");
} else if (error == OTA_CONNECT_ERROR) {
println("Connect Failed");
} else if (error == OTA_RECEIVE_ERROR) {
println("Receive Failed");
} else if (error == OTA_END_ERROR) {
println("End Failed");
}
});
/* Initialize the library and interfaces */
if (!envSensor.begin(BME68X_I2C_ADDR_HIGH, Wire))
{
if(!envSensor.begin(BME68X_I2C_ADDR_LOW, Wire)) {
checkBsecStatus(envSensor);
}
}
/* Load the configuration string that stores information on how to classify the detected gas */
/*
if (!envSensor.setConfig(FieldAir_HandSanitizer_config))
{
checkBsecStatus (envSensor);
}
*/
envSensor.setTemperatureOffset(temperatureOffset);
/* Copy state from the EEPROM to the algorithm */
if (!loadState(envSensor))
{
checkBsecStatus (envSensor);
}
/* Subscribe for the desired BSEC2 outputs */
if (!envSensor.updateSubscription(sensorList, ARRAY_LEN(sensorList), BSEC_SAMPLE_RATE_LP))
{
checkBsecStatus (envSensor);
}
/* Whenever new data is available call the newDataCallback function */
envSensor.attachCallback(newDataCallback);
println("\nBSEC library version " + \
String(envSensor.version.major) + "." \
+ String(envSensor.version.minor) + "." \
+ String(envSensor.version.major_bugfix) + "." \
+ String(envSensor.version.minor_bugfix));
settings.getWifiSettings(currentSsid, currentPass);
println("Current SSID: "+currentSsid+"\ncurrentPass: "+currentPass);
settings.getLocation(metricLocation);
connectToWifi();
println("");
println("Connected to WiFi");
if(hasDisplay){
display.clearDisplay();
display.setCursor(0,0); // Start at top-left corner
if(wifiApMode){
display.print(F("AP SSID: "));
display.println(apSSID);
} else {
display.print(F("SSID: "));
display.println(ssid);
display.print(F("RSSI: "));
display.println(WiFi.RSSI());
}
display.display();
delay(2000);
printWifiStatus();
}
ArduinoOTA.begin();
server.begin();
#ifdef TLS
println("Setting up TLS server");
// and now handle TLS
#if defined(TLS_ECC)
tlsserver.setECCert(new BearSSL::X509List(serverCert), BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN, new BearSSL::PrivateKey(serverKey));
#else
tlsserver.setRSACert(new BearSSL::X509List(serverCert), new BearSSL::PrivateKey(serverKey));
#endif
// Cache SSL sessions to accelerate the TLS handshake.
tlsserver.setCache(&serverCache);
tlsserver.begin();
#endif
}
#if defined(HOMEBRIDGE)
bool updateHb(HTTPClient& client, String devId, long val) {
bool ret = false;
String uri = "http://"+homebridgeHost+":"+webhookPort+"/?accessoryId="+devId+"&value="+val;
client.begin(uri);
int statusCode = client.GET();
if(statusCode > 0){
// no error
if(statusCode == HTTP_CODE_OK || statusCode == HTTP_CODE_MOVED_PERMANENTLY) {
//println("Got response: "+client.getString());
ret = true;
}
else {
println("Status != 200 or 301: " + String(statusCode)+"\n\t"+uri);
}
} else {
println("Error making GET: " + client.errorToString(statusCode) + "\n\t" + uri);
}
client.end();
return ret;
}
bool postTemp(HTTPClient& client) {
return updateHb(client, String(metricLocation) + tempSensorId, committedOutput.comp_temp_c);
}
bool postHumidity(HTTPClient& client) {
return updateHb(client, String(metricLocation) + humiditySensorId, committedOutput.comp_humidity);
}
bool postAqi(HTTPClient& client) {
if(committedOutput.air_quality_accuracy > 1){
int aqi = lastOutput.air_quality / 50;
// basic thresholds are 1-50, 50-100, 101-150, 151-200, 200+
aqi += 1;
if(aqi>5) aqi=5;
return updateHb(client, String(metricLocation) + aqiSensorId, aqi);
}
return false;
}
HTTPClient http;
int updateInterval = 30 * 1000;
long lastUpdate = 0;
void updateHomebridge() {
long now = millis();
if(now > lastUpdate + updateInterval && committedOutput.raw_temp != 0){
lastUpdate = now;
postTemp(http);
postHumidity(http);
postAqi(http);
}
}
#else
// no-op
void updateHomebridge() { }
#endif
int bsecRetries = 0;
/* Function that is looped forever */
void loop(void)
{
ArduinoOTA.handle();
/* Call the run function often so that the library can
* check if it is time to read new data from the sensor
* and process it.
*/
if (!envSensor.run()) {
// only fail hard after a few retries
if(bsecRetries > 30) {
checkBsecStatus (envSensor);
}
bsecRetries++;
delay(100);
}
updateHomebridge();
WiFiClient client = server.accept();
processOneRequest(client);
#ifdef TLS
WiFiClientSecure clients = tlsserver.accept();
processOneRequest(clients);
#endif
int status = WiFi.status();
WiFiMode_t mode = WiFi.getMode();
if(mode != WiFiMode_t::WIFI_AP && status != WL_CONNECTED){
// reconnect? switch to AP mode?
println("WiFi disconnected!");
connectToWifi();
}
}
void errLeds(int bsecStatus, int bsecSensorStatus)
{
if(hasDisplay){
display.clearDisplay();
display.setTextSize(1); // Normal 1:1 pixel scale
display.setTextColor(SSD1306_WHITE); // Draw white text
display.setCursor(0,0); // Start at top-left corner
if(bsecStatus < BSEC_OK) { // error code
display.println("BSEC error code : " + String(bsecStatus));
}
if (bsecSensorStatus < BME68X_OK) {
display.println("BME68X error code : " + String(bsecSensorStatus));
}
display.display();
}
int num_errs = 0;
// only flash the error LEDs for 30 seconds
while(num_errs < 15)
{
digitalWrite(PANIC_LED, HIGH);
delay(ERROR_DUR);
digitalWrite(PANIC_LED, LOW);
delay(ERROR_DUR);
num_errs++;
}
}
void updateBsecState(Bsec2 bsec)
{
static uint16_t stateUpdateCounter = 1;
bool update = false;
if (stateUpdateCounter * STATE_SAVE_PERIOD < millis())
{
/* Update every STATE_SAVE_PERIOD minutes */
update = true;
stateUpdateCounter++;
}
if (update && !saveState(bsec))
checkBsecStatus(bsec);
}
String statusSpinner[] = {"/", "/", "-", "-", "\\", "\\", "|", "|" };
int statusNum = 0;
int statusSize = 8;
void spin(){
display.setCursor(122,0);
if(statusNum % 2 == 0) {
display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
} else {
display.setTextColor(SSD1306_WHITE, SSD1306_BLACK);
}
display.print(statusSpinner[statusNum++]);
display.display();
if(statusNum >= statusSize){
statusNum = 0;
}
display.setTextColor(SSD1306_WHITE, SSD1306_BLACK);
}
void newDataCallback(const bme68xData data, const bsecOutputs outputs, Bsec2 bsec)
{
if (!outputs.nOutputs)
return;
println("BSEC outputs:\n\ttimestamp = " + String((int) (outputs.output[0].time_stamp / INT64_C(1000000))));
for (uint8_t i = 0; i < outputs.nOutputs; i++)
{
const bsecData output = outputs.output[i];
switch (output.sensor_id)
{
/*
client.println(ftd(lastOutput.raw_temp));
client.println(ftd(lastOutput.raw_pressure));
client.println(ftd(lastOutput.raw_humidity));
client.println(ftd(lastOutput.raw_gas));
client.println(ftd(lastOutput.air_quality));
client.println(itd(lastOutput.air_quality_accuracy));
client.println(ftd(lastOutput.comp_temp));
client.println(ftd(lastOutput.comp_humidity));
client.println(ftd(lastOutput.static_air_quality));
client.println(ftd(lastOutput.eco2));
client.println(ftd(lastOutput.voc));
*/
case BSEC_OUTPUT_RUN_IN_STATUS:
println("\tRun in status = " + String(output.signal) + ", accuracy: " + String(output.accuracy));
break;
case BSEC_OUTPUT_STABILIZATION_STATUS:
println("\tStabilization status = " + String(output.signal) + ", accuracy: " + String(output.accuracy));
break;
case BSEC_OUTPUT_IAQ:
println("\tIAQ = " + String(output.signal) + ", accuracy: " + String(output.accuracy));
lastOutput.air_quality = output.signal;
lastOutput.air_quality_accuracy = output.accuracy;
break;
case BSEC_OUTPUT_STATIC_IAQ:
println("\tStatic IAQ = " + String(output.signal) + ", accuracy: " + String(output.accuracy));
lastOutput.static_air_quality = output.signal;
break;
case BSEC_OUTPUT_CO2_EQUIVALENT:
println("\tCO2 equivalent = " + String(output.signal) + ", accuracy: " + String(output.accuracy));
lastOutput.eco2 = output.signal;
break;
case BSEC_OUTPUT_BREATH_VOC_EQUIVALENT:
println("\tbreath VOC = " + String(output.signal) + ", accuracy: " + String(output.accuracy));
lastOutput.voc = output.signal;
break;
case BSEC_OUTPUT_RAW_TEMPERATURE:
lastOutput.raw_temp = output.signal * 9 / 5 + 32;
println("\ttemperature = " + String(lastOutput.raw_temp) + "°F" + ", accuracy: " + String(output.accuracy));
break;
case BSEC_OUTPUT_RAW_PRESSURE:
lastOutput.raw_pressure = output.signal * 0.00029529983071445 + pressureOffset;
println("\tpressure = " + String(lastOutput.raw_pressure) + "inHg" + ", accuracy: " + String(output.accuracy));
break;
case BSEC_OUTPUT_RAW_HUMIDITY:
println("\thumidity = " + String(output.signal) + "%" + ", accuracy: " + String(output.accuracy));
lastOutput.raw_humidity = output.signal;
break;
case BSEC_OUTPUT_RAW_GAS:
println("\tgas resistance = " + String(output.signal) + ", accuracy: " + String(output.accuracy));
lastOutput.raw_gas = output.signal;
break;
case BSEC_OUTPUT_RAW_GAS_INDEX:
println("\tgas index = " + String(output.signal) + ", accuracy: " + String(output.accuracy));
break;
case BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_TEMPERATURE:
lastOutput.comp_temp = output.signal * 9 / 5 + 32;
lastOutput.comp_temp_c = output.signal;
println("\tcompensated temperature = " + String(lastOutput.comp_temp) + "°F" + ", accuracy: " + String(output.accuracy));
// commit the measurements here
updateDisplay();
commitLast();
break;
case BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_HUMIDITY:
println("\tcompensated humidity = " + String(output.signal) + "%" + ", accuracy: " + String(output.accuracy));
lastOutput.comp_humidity = output.signal;
break;
case BSEC_OUTPUT_GAS_ESTIMATE_1:
case BSEC_OUTPUT_GAS_ESTIMATE_2:
case BSEC_OUTPUT_GAS_ESTIMATE_3:
case BSEC_OUTPUT_GAS_ESTIMATE_4:
if((int)(output.signal * 10000.0f) > 0) /* Ensure that there is a valid value xx.xx% */
{
println("\t" + \
gasName[(int) (output.sensor_id - BSEC_OUTPUT_GAS_ESTIMATE_1)] + \
String(" probability : ") + String(output.signal * 100) + "%");
}
break;
default:
break;
}
}
spin();
updateBsecState(envSensor);
}
void commitLast() {
memcpy(&committedOutput, &lastOutput, sizeof(bsec_outputs_t));
committedOutput.timestamp = time(nullptr);
}
void updateDisplay()
{
// display is 21 chars wide
display.clearDisplay();
display.setCursor(0,0); // Start at top-left corner
// AQI and CI are 15-16 chars wide
display.print(F("AQ "));
int aqi = round(lastOutput.air_quality);
if(aqi < 51) { // 0-50 == GOOD
display.print("Good (");
} else if(aqi < 101){ // 51-100 == Moderate
display.print("Mod (");
} else if(aqi < 151){ // 101-150 == Unhealthy for sensitive groups
display.print("USG (");
} else if(aqi < 201){ // 151-200 == Unhealthy
display.print("U/H (");
} else if(aqi < 301){ // 201-300 == Very unhealthy
display.print("VU/H (");
} else { // 301+ == Hazardous
display.print("HAZ! (");
}
display.print(aqi);
//display.print(lastOutput.air_quality);
display.print(F(") \t A:"));
int aqa = lastOutput.air_quality_accuracy;
display.println(aqa);
/*
if(aqa == 3){
display.println(F("3"));
} else if(aqa == 2){
display.println(F("2"));
} else if(aqa == 1) {
display.println(F("1"));
} else {
display.println(F("0"));
}*/
// Temp, humidity are 17-18 wide
display.print(int(round(lastOutput.comp_temp)));
display.print(F("F "));
display.print(int(round(lastOutput.comp_humidity)));
display.print(F("% "));
display.print(lastOutput.raw_pressure);
display.println(F("inHg"));
display.print(F("CO2 "));
display.print(int(lastOutput.eco2));
display.print(F(" \t VOC "));
display.println(lastOutput.voc);
WiFiMode_t mode = WiFi.getMode();
if(mode == WiFiMode_t::WIFI_AP){
display.print(F("AP SSID: "));
display.print(WiFi.SSID());
} else {
int status = WiFi.status();
if(status != WL_CONNECTED){
display.print(F("WiFi D/C"));
} else {
display.print(F("WiFi signal: ")); // 13 chars
long rs = WiFi.RSSI();
rs *= -1;
if(rs == 0) {
display.print(F(" D/C"));
} else if(rs < 70){
display.print(F(" GOOD"));
} else if(rs < 80){
display.print(F(" OKAY"));
} else if(rs < 90){
display.print(F(" POOR"));
} else {
display.print(F("AWFUL"));
}
}
}
display.display();
}
void checkBsecStatus(Bsec2 bsec)
{
if (bsec.status < BSEC_OK)
{
println("BSEC error code : " + String(bsec.status));
errLeds(bsec.status, 0); /* Halt in case of failure */
} else if (bsec.status > BSEC_OK)
{
println("BSEC warning code : " + String(bsec.status));
}
if (bsec.sensor.status < BME68X_OK)
{
println("BME68X error code : " + String(bsec.sensor.status));
errLeds(0, bsec.sensor.status); /* Halt in case of failure */
} else if (bsec.sensor.status > BME68X_OK)
{
println("BME68X warning code : " + String(bsec.sensor.status));
}
}
bool loadState(Bsec2 bsec)
{
#ifdef USE_EEPROM
if (EEPROM.read(0) == BSEC_MAX_STATE_BLOB_SIZE)
{
/* Existing state in EEPROM */
println("Reading state from EEPROM");
print("State file: ");
for (uint8_t i = 0; i < BSEC_MAX_STATE_BLOB_SIZE; i++)
{
bsecState[i] = EEPROM.read(i + 1);
print(String(bsecState[i], HEX) + ", ");
}
println("");
if (!bsec.setState(bsecState))
return false;
} else
{
/* Erase the EEPROM with zeroes */
println("Erasing EEPROM");
for (uint8_t i = 0; i <= BSEC_MAX_STATE_BLOB_SIZE; i++)
EEPROM.write(i, 0);
EEPROM.commit();
}
#endif
return true;
}
bool saveState(Bsec2 bsec)
{
#ifdef USE_EEPROM
if (!bsec.getState(bsecState))
return false;
println("Writing state to EEPROM");
print("State file: ");
for (uint8_t i = 0; i < BSEC_MAX_STATE_BLOB_SIZE; i++)
{
EEPROM.write(i + 1, bsecState[i]);
print(String(bsecState[i], HEX) + ", ");
}
println("");
EEPROM.write(0, BSEC_MAX_STATE_BLOB_SIZE);
return EEPROM.commit();
#endif
return true;
}
bool wipeState()
{
#ifdef USE_EEPROM
/* Erase the EEPROM with zeroes */
println("Erasing EEPROM");
for (uint8_t i = 0; i <= BSEC_MAX_STATE_BLOB_SIZE; i++)
{
EEPROM.write(i, 0);
}
return EEPROM.commit();
#endif
return true;
}
String getWifiStatus() {
return "Current SSID: " + WiFi.SSID() + "\nIP Address: " + WiFi.localIP().toString() + "\nSignal Strength (RSSI): " + String(WiFi.RSSI()) + " dBm\n\n" +
"Default SSID: \"" + ssid + "\"\nFilesystem SSID: \"" + currentSsid + "\"\n\nDefault pass: \"" + pass + "\"\nFilesystem pass: \"" + currentPass + "\"";
}
void printWifiStatus() {
// print the SSID of the network you're attached to:
print("SSID: ");
println(WiFi.SSID());
// print your board's IP address:
IPAddress ip = WiFi.localIP();
print("IP Address: ");
println(ip.toString());
// print the received signal strength:
long rssi = WiFi.RSSI();
print("signal strength (RSSI):");
print(String(rssi));
println(" dBm");
}
void printHead(WiFiClient &client, int statusCode, String contentType) {
client.println("HTTP/1.1 "+String(statusCode)+" OK");
client.println("Content-Type: "+contentType+"; charset=utf-8");
client.println("Connection: close");
client.println();
}
String metric(String key, int val, String location, String timestamp) {
return key + "{group=\"environment\", location=\""+location+"\"} " + val + " " + timestamp +"000\n";
}
String metric(String key, float val, String location, String timestamp) {
return key + "{group=\"environment\", location=\""+location+"\"} " + val + " " + timestamp + "000\n";
}
bool processOneRequest(WiFiClient &client){
bool resetBoard = false;
bool reconnectWifi = false;
String resp = "<table><tr><th>Timestamp [ms]</th><th>raw temperature [°F]</th><th>pressure [mmHg]</th><th>raw relative humidity [%]</th><th>gas [Ohm]</th><th>IAQ</th><th>IAQ accuracy</th><th>temperature [°F]</th><th>relative humidity [%]</th><th>Static IAQ</th><th>CO2 equivalent</th><th>breath VOC equivalent</tr>\n";
if (client) {
println("New client");
bool currentLineIsBlank = true;
String input = "";
while (client.connected()) {
if (client.available()) {
char c = client.read();
input += c;
if (c == '\n' && currentLineIsBlank) {
Request req = Request(input, hasSerial);
if(req.getVerb() == Verb::Post){
String body = "";
char c;
while(client.available()){
// read the POST body
c = client.read();
body += c;
}
req.setBody(body);
}
//Serial.write(input.c_str());
if(req.getPath() == "/"){
println("Root req, responding!");
printHead(client, 200, "text/html");
client.println("<!DOCTYPE HTML>");
client.println("<html><head></head><body>");
unsigned long time_trigger = millis();
client.println(resp);
client.println("<tr>");
client.println(ltd(time_trigger));
client.println(ftd(lastOutput.raw_temp));
client.println(ftd(lastOutput.raw_pressure));
client.println(ftd(lastOutput.raw_humidity));
client.println(ftd(lastOutput.raw_gas));
client.println(ftd(lastOutput.air_quality));
client.println(itd(lastOutput.air_quality_accuracy));
client.println(ftd(lastOutput.comp_temp));
client.println(ftd(lastOutput.comp_humidity));
client.println(ftd(lastOutput.static_air_quality));
client.println(ftd(lastOutput.eco2));
client.println(ftd(lastOutput.voc));
client.println("</tr></table></body></html>");