mirror of https://github.com/arendst/Tasmota.git
143 lines
3.3 KiB
C++
143 lines
3.3 KiB
C++
/*
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* This is an example showing a simple environment sensor based on a BME280 attached via I2C.
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* It shows, how the library can used to statically configure a device without a webserver for config.
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* This sketch was tested on a WeMos D1 mini
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*/
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#include <Adafruit_BME280.h>
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#include <esp-knx-ip.h>
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// WiFi config here
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const char* ssid = "myssid";
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const char* pass = "mypassword";
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#define LED_PIN D4
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#define UPDATE_INTERVAL 10000
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unsigned long next_change = 0;
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float last_temp = 0.0;
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float last_hum = 0.0;
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float last_pres = 0.0;
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Adafruit_BME280 bme;
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// Group addresses to send to (1/1/1, 1/1/2 and 1/1/3)
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address_t temp_ga = knx.GA_to_address(1, 1, 1);
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address_t hum_ga = knx.GA_to_address(1, 1, 2);
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address_t pres_ga = knx.GA_to_address(1, 1, 3);
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void setup() {
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pinMode(LED_PIN, OUTPUT);
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Serial.begin(115200);
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callback_id_t temp_cb_id = knx.callback_register("Read Temperature", temp_cb);
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callback_id_t hum_cb_id =knx.callback_register("Read Humidity", hum_cb);
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callback_id_t pres_cb_id =knx.callback_register("Read Pressure", pres_cb);
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// Assign callbacks to group addresses (2/1/1, 2/1/2, 2/1/3)
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knx.callback_assign(temp_cb_id, knx.GA_to_address(2, 1, 1));
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knx.callback_assign(hum_cb_id, knx.GA_to_address(2, 1, 2));
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knx.callback_assign(pres_cb_id, knx.GA_to_address(2, 1, 3));
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// Set physical address (1.1.1)
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knx.physical_address_set(knx.PA_to_address(1, 1, 1));
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// Do not call knx.load() for static config, it will try to load config from EEPROM which we don't have here
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// Init sensor
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if (!bme.begin(0x76)) {
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Serial.println("Could not find a valid BME280 sensor, check wiring!");
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}
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// Init WiFi
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WiFi.hostname("env");
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WiFi.begin(ssid, pass);
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Serial.println("");
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Serial.print("[Connecting]");
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Serial.print(ssid);
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digitalWrite(LED_PIN, LOW);
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while (WiFi.status() != WL_CONNECTED) {
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digitalWrite(LED_PIN, HIGH);
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delay(250);
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Serial.print(".");
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digitalWrite(LED_PIN, LOW);
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delay(250);
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}
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digitalWrite(LED_PIN, HIGH);
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// Start knx, disable webserver by passing nullptr
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knx.start(nullptr);
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Serial.println();
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Serial.println("Connected to wifi");
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Serial.println(WiFi.localIP());
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}
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void loop() {
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knx.loop();
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unsigned long now = millis();
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if (next_change < now)
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{
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next_change = now + UPDATE_INTERVAL;
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last_temp = bme.readTemperature();
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last_hum = bme.readHumidity();
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last_pres = bme.readPressure()/100.0f;
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Serial.print("T: ");
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Serial.print(last_temp);
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Serial.print("°C H: ");
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Serial.print(last_hum);
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Serial.print("% P: ");
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Serial.print(last_pres);
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Serial.println("hPa");
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knx.write_2byte_float(temp_ga, last_temp);
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knx.write_2byte_float(hum_ga, last_hum);
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knx.write_2byte_float(pres_ga, last_pres);
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}
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delay(50);
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}
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void temp_cb(message_t const &msg, void *arg)
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{
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switch (msg.ct)
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{
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case KNX_CT_READ:
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{
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knx.answer_2byte_float(msg.received_on, last_temp);
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break;
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}
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}
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}
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void hum_cb(message_t const &msg, void *arg)
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{
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switch (msg.ct)
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{
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case KNX_CT_READ:
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{
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knx.answer_2byte_float(msg.received_on, last_hum);
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break;
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}
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}
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}
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void pres_cb(message_t const &msg, void *arg)
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{
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switch (msg.ct)
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{
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case KNX_CT_READ:
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{
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knx.answer_2byte_float(msg.received_on, last_pres);
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break;
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}
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}
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}
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