/* * main.cpp * * ESP8266 / ESP32 Environmental Sensor * * ---------------------------------------------------------------------------- * "THE BEER-WARE LICENSE" (Revision 42): * wrote this file. As long as you retain this notice * you can do whatever you want with this stuff. If we meet some day, and you * think this stuff is worth it, you can buy me a beer in return. Thomas Buck * ---------------------------------------------------------------------------- */ #include #include #include #include #if defined(ARDUINO_ARCH_ESP8266) #include #include #include #define ESP_PLATFORM_NAME "ESP8266" #elif defined(ARDUINO_ARCH_ESP32) #include #include #include #define ESP_PLATFORM_NAME "ESP32" #endif #include "config.h" #include "moisture.h" #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) #include "SimpleUpdater.h" #define BUILTIN_LED_PIN 1 UPDATE_WEB_SERVER server(80); SimpleUpdater updater; #elif defined(ARDUINO_ARCH_AVR) #define ESP_PLATFORM_NAME "Uno WiFi" #define BUILTIN_LED_PIN 13 #endif #ifdef ENABLE_INFLUXDB_LOGGING #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) #include #else #include "SimpleInflux.h" #endif Influxdb influx(INFLUXDB_HOST, INFLUXDB_PORT); #define INFLUX_MAX_ERRORS_RESET 10 int error_count = 0; #endif // ENABLE_INFLUXDB_LOGGING #define SHT_I2C_ADDRESS HTDU21D_ADDRESS #define BME_I2C_ADDRESS_1 0x76 #define BME_I2C_ADDRESS_2 0x77 #if defined(ARDUINO_ARCH_ESP8266) #define I2C_SDA_PIN 2 #define I2C_SCL_PIN 0 TwoWire Wire2; SHT2x sht(SHT_I2C_ADDRESS, &Wire2); #elif defined(ARDUINO_ARCH_ESP32) SHT2x sht(SHT_I2C_ADDRESS, &Wire); #elif defined(ARDUINO_ARCH_AVR) #include #include WiFiServer server(80); SHT2x sht(SHT_I2C_ADDRESS, &Wire); #endif //#define ENABLE_RELAIS_TEST Adafruit_BME280 bme1, bme2; bool found_bme1 = false; bool found_bme2 = false; bool found_sht = false; unsigned long last_server_handle_time = 0; unsigned long last_db_write_time = 0; unsigned long last_led_blink_time = 0; #ifdef ENABLE_RELAIS_TEST #include "relais.h" static void relaisTest() { for (int i = 0; i < 10; i++) { relais_enable(i, 400 + (i * 1000)); delay(100); } } void handleRelaisTest() { String message = F(""); message += F("" ESP_PLATFORM_NAME " Environment Sensor"); message += F(""); message += F("

Relais Test started!

"); message += F("

"); message += F(""); server.send(200, "text/html", message); relaisTest(); } #endif // ENABLE_RELAIS_TEST static float bme1_temp(void) { while (1) { float a = bme1.readTemperature(); float b = bme1.readTemperature(); if ((a > b) && ((a - b) < 2.0)) { return (a + b) / 2.0; } if ((a < b) && ((b - a) < 2.0)) { return (a + b) / 2.0; } } return 0.0; } static float bme2_temp(void) { while (1) { float a = bme2.readTemperature(); float b = bme2.readTemperature(); if ((a > b) && ((a - b) < 2.0)) { return (a + b) / 2.0; } if ((a < b) && ((b - a) < 2.0)) { return (a + b) / 2.0; } } return 0.0; } static float bme1_humid(void) { while (1) { float a = bme1.readHumidity(); float b = bme1.readHumidity(); if ((a > b) && ((a - b) < 2.0)) { return (a + b) / 2.0; } if ((a < b) && ((b - a) < 2.0)) { return (a + b) / 2.0; } } return 0.0; } static float bme2_humid(void) { while (1) { float a = bme2.readHumidity(); float b = bme2.readHumidity(); if ((a > b) && ((a - b) < 2.0)) { return (a + b) / 2.0; } if ((a < b) && ((b - a) < 2.0)) { return (a + b) / 2.0; } } return 0.0; } static float bme1_pressure(void) { while (1) { float a = bme1.readPressure(); float b = bme1.readPressure(); if ((a > b) && ((a - b) < 2.0)) { return (a + b) / 2.0; } if ((a < b) && ((b - a) < 2.0)) { return (a + b) / 2.0; } } return 0.0; } static float bme2_pressure(void) { while (1) { float a = bme2.readPressure(); float b = bme2.readPressure(); if ((a > b) && ((a - b) < 2.0)) { return (a + b) / 2.0; } if ((a < b) && ((b - a) < 2.0)) { return (a + b) / 2.0; } } return 0.0; } static float sht_temp(void) { while (1) { float a = sht.GetTemperature(); float b = sht.GetTemperature(); if ((a > b) && ((a - b) < 2.0)) { return (a + b) / 2.0; } if ((a < b) && ((b - a) < 2.0)) { return (a + b) / 2.0; } } return 0.0; } static float sht_humid(void) { while (1) { float a = sht.GetHumidity(); float b = sht.GetHumidity(); if ((a > b) && ((a - b) < 2.0)) { return (a + b) / 2.0; } if ((a < b) && ((b - a) < 2.0)) { return (a + b) / 2.0; } } return 0.0; } #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) void handleRoot() { #else void handleRoot(WiFiClient &client) { #endif String message; message += F(""); message += F("" ESP_PLATFORM_NAME " Environment Sensor"); message += F(""); message += F("

" ESP_PLATFORM_NAME " Environment Sensor

"); message += F("

"); message += F("Version: "); message += esp_env_version; message += F("
"); message += F("Location: "); message += sensor_location; #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) message += F("
"); message += F("MAC: "); message += WiFi.macAddress(); #endif message += F("

"); #if defined(ARDUINO_ARCH_AVR) do { size_t len = message.length(), off = 0; while (off < len) { if ((len - off) >= 50) { client.write(message.c_str() + off, 50); off += 50; } else { client.write(message.c_str() + off, len - off); off = len; } } message = ""; } while (false); #endif #if defined(ARDUINO_ARCH_ESP8266) message += F("

"); message += F("Reset reason: "); message += ESP.getResetReason(); message += F("
"); message += F("Free heap: "); message += String(ESP.getFreeHeap()); message += F(" ("); message += String(ESP.getHeapFragmentation()); message += F("% fragmentation)"); message += F("
"); message += F("Free sketch space: "); message += String(ESP.getFreeSketchSpace()); message += F("
"); message += F("Flash chip real size: "); message += String(ESP.getFlashChipRealSize()); if (ESP.getFlashChipSize() != ESP.getFlashChipRealSize()) { message += F("
"); message += F("WARNING: sdk chip size ("); message += (ESP.getFlashChipSize()); message += F(") does not match!"); } message += F("

"); #elif defined(ARDUINO_ARCH_ESP32) message += F("

"); message += F("Free heap: "); message += String(ESP.getFreeHeap() / 1024.0); message += F("k
"); message += F("Free sketch space: "); message += String(ESP.getFreeSketchSpace() / 1024.0); message += F("k
"); message += F("Flash chip size: "); message += String(ESP.getFlashChipSize() / 1024.0); message += F("k

"); #endif message += F("

"); if (found_bme1) { message += F("BME280 Low:"); message += F("
"); message += F("Temperature: "); message += String(bme1_temp()); message += F("
"); message += F("Humidity: "); message += String(bme1_humid()); message += F("
"); message += F("Pressure: "); message += String(bme1_pressure()); } else { message += F("BME280 (low) not connected!"); } message += F("

"); message += F("

"); if (found_bme2) { message += F("BME280 High:"); message += F("
"); message += F("Temperature: "); message += String(bme2_temp()); message += F("
"); message += F("Humidity: "); message += String(bme2_humid()); message += F("
"); message += F("Pressure: "); message += String(bme2_pressure()); } else { message += F("BME280 (high) not connected!"); } message += F("

"); message += F("

"); if (found_sht) { message += F("SHT21:"); message += F("
"); message += F("Temperature: "); message += String(sht_temp()); message += F("
"); message += F("Humidity: "); message += String(sht_humid()); } else { //message += F("SHT21 not connected!"); } message += F("

"); message += F("Sensor "); message += String(i + 1); message += F(":
"); message += F("Moisture: "); message += String(moisture); message += F(" / "); message += String(moisture_max()); message += F("

"); } } if (moisture_count() <= 0) { message += F("

"); message += F("No moisture sensors configured!"); message += F("

"); } #if ! defined(ARDUINO_ARCH_AVR) message += F("

"); message += F("Try /update for OTA firmware updates!"); message += F("

"); #endif message += F("

"); #ifdef ENABLE_INFLUXDB_LOGGING message += F("InfluxDB: "); message += INFLUXDB_DATABASE; message += F(" @ "); message += INFLUXDB_HOST; message += F(":"); message += String(INFLUXDB_PORT); #else message += F("InfluxDB logging not enabled!"); #endif message += F("

"); #ifdef ENABLE_RELAIS_TEST message += F("

Relais Test

"); #endif // ENABLE_RELAIS_TEST message += F(""); #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) server.send(200, "text/html", message); #else do { size_t len = message.length(), off = 0; while (off < len) { if ((len - off) >= 50) { client.write(message.c_str() + off, 50); off += 50; } else { client.write(message.c_str() + off, len - off); off = len; } } } while (false); #endif } void setup() { pinMode(BUILTIN_LED_PIN, OUTPUT); #ifdef ENABLE_RELAIS_TEST relais_init(); #endif // ENABLE_RELAIS_TEST // Blink LED for init for (int i = 0; i < 2; i++) { digitalWrite(BUILTIN_LED_PIN, LOW); // LED on delay(LED_INIT_BLINK_INTERVAL); digitalWrite(BUILTIN_LED_PIN, HIGH); // LED off delay(LED_INIT_BLINK_INTERVAL); } moisture_init(); // Init I2C and try to connect to sensors #if defined(ARDUINO_ARCH_ESP8266) Wire2.begin(I2C_SDA_PIN, I2C_SCL_PIN); found_bme1 = (!bme1.begin(BME_I2C_ADDRESS_1, &Wire2)) ? false : true; found_bme2 = (!bme2.begin(BME_I2C_ADDRESS_2, &Wire2)) ? false : true; #elif defined(ARDUINO_ARCH_ESP32) Wire.begin(); found_bme1 = (!bme1.begin(BME_I2C_ADDRESS_1, &Wire)) ? false : true; found_bme2 = (!bme2.begin(BME_I2C_ADDRESS_2, &Wire)) ? false : true; #elif defined(ARDUINO_ARCH_AVR) Wire.begin(); found_bme1 = (!bme1.begin(BME_I2C_ADDRESS_1, &Wire)) ? false : true; found_bme2 = (!bme2.begin(BME_I2C_ADDRESS_2, &Wire)) ? false : true; #endif found_sht = sht.GetAlive(); // Build hostname string String hostname = SENSOR_HOSTNAME_PREFIX; hostname += sensor_location; #if defined(ARDUINO_ARCH_ESP8266) // Connect to WiFi AP WiFi.hostname(hostname); WiFi.mode(WIFI_STA); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(LED_CONNECT_BLINK_INTERVAL); digitalWrite(BUILTIN_LED_PIN, !digitalRead(BUILTIN_LED_PIN)); } #elif defined(ARDUINO_ARCH_ESP32) // Set hostname workaround WiFi.config(INADDR_NONE, INADDR_NONE, INADDR_NONE); WiFi.setHostname(hostname.c_str()); // Workaround for WiFi connecting only every 2nd reset // https://github.com/espressif/arduino-esp32/issues/2501#issuecomment-513602522 WiFi.onEvent([](WiFiEvent_t event, WiFiEventInfo_t info) { if (info.disconnected.reason == 202) { esp_sleep_enable_timer_wakeup(10); esp_deep_sleep_start(); delay(100); } }, WiFiEvent_t::SYSTEM_EVENT_STA_DISCONNECTED); // Connect to WiFi AP WiFi.mode(WIFI_STA); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(LED_CONNECT_BLINK_INTERVAL); digitalWrite(BUILTIN_LED_PIN, !digitalRead(BUILTIN_LED_PIN)); } // Set hostname workaround WiFi.setHostname(hostname.c_str()); #elif defined(ARDUINO_ARCH_AVR) Serial.begin(115200); Serial1.begin(115200); WiFi.init(&Serial1); Serial.print(F("Connecting WiFi")); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(LED_CONNECT_BLINK_INTERVAL); digitalWrite(BUILTIN_LED_PIN, !digitalRead(BUILTIN_LED_PIN)); Serial.print(F(".")); } Serial.println(F("\nWiFi connected!")); #endif #ifdef ENABLE_INFLUXDB_LOGGING // Setup InfluxDB Client influx.setDb(INFLUXDB_DATABASE); #endif // ENABLE_INFLUXDB_LOGGING #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) // Setup HTTP Server MDNS.begin(hostname.c_str()); updater.setup(&server); server.on("/", handleRoot); #ifdef ENABLE_RELAIS_TEST server.on("/relaistest", handleRelaisTest); #endif MDNS.addService("http", "tcp", 80); #endif server.begin(); } #if defined(ARDUINO_ARCH_AVR) void http_server() { // listen for incoming clients WiFiClient client = server.available(); if (client) { Serial.println(F("new http client")); // an http request ends with a blank line boolean currentLineIsBlank = true; while (client.connected()) { if (client.available()) { char c = client.read(); Serial.write(c); // if you've gotten to the end of the line (received a newline // character) and the line is blank, the http request has ended, // so you can send a reply if ((c == '\n') && currentLineIsBlank) { // send a standard http response header client.println(F("HTTP/1.1 200 OK")); client.println(F("Content-Type: text/html")); client.println(F("Connection: close")); client.println(); handleRoot(client); break; } if (c == '\n') { // you're starting a new line currentLineIsBlank = true; } else if (c != '\r') { // you've gotten a character on the current line currentLineIsBlank = false; } } } // give the web browser time to receive the data delay(10); // close the connection client.stop(); Serial.println(F("http client disconnected")); } } #endif void handleServers() { #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) server.handleClient(); #else http_server(); #endif #if defined(ARDUINO_ARCH_ESP8266) MDNS.update(); #endif } #ifdef ENABLE_INFLUXDB_LOGGING static boolean writeMeasurement(InfluxData &measurement) { boolean success = influx.write(measurement); if (!success) { error_count++; for (int i = 0; i < 10; i++) { digitalWrite(BUILTIN_LED_PIN, LOW); // LED on delay(LED_ERROR_BLINK_INTERVAL); digitalWrite(BUILTIN_LED_PIN, HIGH); // LED off delay(LED_ERROR_BLINK_INTERVAL); } } return success; } void writeDatabase() { #if defined(ARDUINO_ARCH_AVR) Serial.println(F("Writing to InfluxDB")); InfluxData measurement(""); #endif if (found_bme1) { #if defined(ARDUINO_ARCH_AVR) measurement.clear(); measurement.setName("environment"); #else InfluxData measurement("environment"); #endif measurement.addTag("location", sensor_location); measurement.addTag("placement", "1"); measurement.addTag("sensor", "bme280"); #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) measurement.addTag("device", WiFi.macAddress()); #endif measurement.addValue("temperature", bme1_temp()); measurement.addValue("pressure", bme1_pressure()); measurement.addValue("humidity", bme1_humid()); Serial.println(F("Writing bme1")); writeMeasurement(measurement); Serial.println(F("Done!")); } if (found_bme2) { #if defined(ARDUINO_ARCH_AVR) measurement.clear(); measurement.setName("environment"); #else InfluxData measurement("environment"); #endif measurement.addTag("location", sensor_location); measurement.addTag("placement", "2"); measurement.addTag("sensor", "bme280"); #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) measurement.addTag("device", WiFi.macAddress()); #endif measurement.addValue("temperature", bme2_temp()); measurement.addValue("pressure", bme2_pressure()); measurement.addValue("humidity", bme2_humid()); Serial.println(F("Writing bme2")); writeMeasurement(measurement); Serial.println(F("Done!")); } if (found_sht) { #if defined(ARDUINO_ARCH_AVR) measurement.clear(); measurement.setName("environment"); #else InfluxData measurement("environment"); #endif measurement.addTag("location", sensor_location); measurement.addTag("sensor", "sht21"); #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) measurement.addTag("device", WiFi.macAddress()); #endif measurement.addValue("temperature", sht_temp()); measurement.addValue("humidity", sht_humid()); Serial.println(F("Writing sht")); writeMeasurement(measurement); Serial.println(F("Done!")); } for (int i = 0; i < moisture_count(); i++) { int moisture = moisture_read(i); if (moisture < moisture_max()) { #if defined(ARDUINO_ARCH_AVR) measurement.clear(); measurement.setName("moisture"); #else InfluxData measurement("moisture"); #endif measurement.addTag("location", sensor_location); String sensor(i + 1, DEC); measurement.addTag("sensor", sensor); #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) measurement.addTag("device", WiFi.macAddress()); #endif measurement.addValue("value", moisture); measurement.addValue("maximum", moisture_max()); Serial.print(F("Writing moisture ")); Serial.println(i); writeMeasurement(measurement); Serial.println(F("Done!")); } } Serial.println(F("All Done!")); } #endif // ENABLE_INFLUXDB_LOGGING void loop() { unsigned long time = millis(); #ifdef ENABLE_RELAIS_TEST relais_run(); #endif // ENABLE_RELAIS_TEST if ((time - last_server_handle_time) >= SERVER_HANDLE_INTERVAL) { last_server_handle_time = time; handleServers(); } #ifdef ENABLE_INFLUXDB_LOGGING if ((time - last_db_write_time) >= DB_WRITE_INTERVAL) { last_db_write_time = time; writeDatabase(); } #ifdef INFLUX_MAX_ERRORS_RESET if (error_count >= INFLUX_MAX_ERRORS_RESET) { #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) ESP.restart(); #endif } #endif // INFLUX_MAX_ERRORS_RESET #endif // ENABLE_INFLUXDB_LOGGING // blink heartbeat LED if ((time - last_led_blink_time) >= LED_BLINK_INTERVAL) { last_led_blink_time = time; digitalWrite(BUILTIN_LED_PIN, !digitalRead(BUILTIN_LED_PIN)); } #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32) // reset ESP every 6h to be safe if (time >= (6 * 60 * 60 * 1000)) { ESP.restart(); } #endif }