Add BH1750 subsystem
Currently the subsystem only supports one single sensor. It publishes its state to lightsensor/livingroom_window/status every 5 seconds.
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multi-esp.ino
119
multi-esp.ino
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@ -2,20 +2,57 @@
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#include <WiFiClient.h>
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#include <PubSubClient.h>
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#include <RCSwitch.h>
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#include <BH1750.h>
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#include <Wire.h>
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#include "secrets.h"
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#define MQTT_VERSION MQTT_VERSION_3_1_1
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// General MQTT settings
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const PROGMEM char* MQTT_CLIENT_ID = "multi-esp";
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const PROGMEM char* MQTT_SERVER_IP = "10.42.0.3";
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const PROGMEM uint16_t MQTT_SERVER_PORT = 1883;
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// TODO: check if needed?
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//const PROGMEM char* MQTT_USER = "[Redacted]";
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//const PROGMEM char* MQTT_PASSWORD = "[Redacted]";
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// RFSOCKET subsystem mqtt topic components
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const char* MQTT_RFSOCKET_SUBSYSTEM = "rfsockets/";
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const char* MQTT_RFSOCKET_STATE_TOPIC = "/status";
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const char* MQTT_RFSOCKET_COMMAND_TOPIC = "/switch";
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// payloads by default (on/off)
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const char* LIGHT_ON = "ON";
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const char* LIGHT_OFF = "OFF";
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// BH1750 subsystem mqtt topic components
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// TODO: implement support for multiple sensors.
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// (BH1750 can talk on two different i²c addr)
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const char* MQTT_BH1750_SUBSYSTEM = "lightsensor/";
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const char* MQTT_BH1750_LOCATION = "livingroom_window";
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const char* MQTT_BH1750_STATE_TOPIC = "/status";
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unsigned long last_bh1750_publish = millis();
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WiFiClient wifiClient;
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PubSubClient client(wifiClient);
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RCSwitch mySwitch = RCSwitch();
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BH1750 lightMeter;
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typedef struct {
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char* channel;
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char* id;
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char name[255];
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bool powered;
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char* channel; // First DIP set
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char* id; // Second DIP set
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char name[255]; // human readable name (included in mqtt topic)
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bool powered; // last known power state of socket
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uint8_t type; // 0=DIP, 1=Learned
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int on_code;
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int off_code;
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int on_code; // ON code for self learning sockets (according to trained remote)
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int off_code; // Same as above but for OFF
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} PowerSocket;
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// see struct for description of fields
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@ -32,30 +69,34 @@ PowerSocket sockets[] = {
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int numofsockets = sizeof(sockets)/sizeof(sockets[0]);
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// MQTT: ID, server IP, port, username and password
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const PROGMEM char* MQTT_CLIENT_ID = "multi-esp";
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const PROGMEM char* MQTT_SERVER_IP = "10.42.0.3";
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const PROGMEM uint16_t MQTT_SERVER_PORT = 1883;
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// TODO: check if needed?
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//const PROGMEM char* MQTT_USER = "[Redacted]";
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//const PROGMEM char* MQTT_PASSWORD = "[Redacted]";
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// function called to measure and publish the state of the BH1750
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void publishBH1750State() {
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uint16_t lux = lightMeter.readLightLevel();
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char lux_string[10];
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itoa(lux, lux_string, 10);
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char topic[
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strlen(MQTT_BH1750_SUBSYSTEM) +
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strlen(MQTT_BH1750_LOCATION) +
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strlen(MQTT_BH1750_STATE_TOPIC)
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];
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strcpy(topic, MQTT_BH1750_SUBSYSTEM);
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strcat(topic, MQTT_BH1750_LOCATION);
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strcat(topic, MQTT_BH1750_STATE_TOPIC);
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client.publish(topic, lux_string, true);
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}
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const char* MQTT_RFSOCKET_SUBSYSTEM = "rfsockets/";
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const char* MQTT_RFSOCKET_STATE_TOPIC = "/status";
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const char* MQTT_RFSOCKET_COMMAND_TOPIC = "/switch";
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// payloads by default (on/off)
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const char* LIGHT_ON = "ON";
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const char* LIGHT_OFF = "OFF";
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WiFiClient wifiClient;
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PubSubClient client(wifiClient);
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// function called to publish the state of the light (on/off)
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void publishLightState(int socketIdx) {
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// function called to publish the state of the rfsockets (on/off)
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void publishSocketState(int socketIdx) {
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char *socket_name = sockets[socketIdx].name;
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char topic[strlen(MQTT_RFSOCKET_SUBSYSTEM) + strlen(MQTT_RFSOCKET_STATE_TOPIC) + strlen(socket_name)];
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char topic[
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strlen(MQTT_RFSOCKET_SUBSYSTEM) +
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strlen(MQTT_RFSOCKET_STATE_TOPIC) +
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strlen(socket_name)
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];
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strcpy(topic, MQTT_RFSOCKET_SUBSYSTEM);
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strcat(topic, socket_name);
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strcat(topic, MQTT_RFSOCKET_STATE_TOPIC);
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@ -67,8 +108,8 @@ void publishLightState(int socketIdx) {
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}
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}
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// function called to turn on/off the light
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void setLightState(byte socketIdx) {
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// function called to turn on/off the rfsockets
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void setSocketState(byte socketIdx) {
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if (sockets[socketIdx].powered) {
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setSocket(socketIdx, true);
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Serial.println("INFO: Turn light on...");
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@ -78,6 +119,7 @@ void setLightState(byte socketIdx) {
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}
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}
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// handler for mqtt messages arriving on that subsystems topic
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void subsystem_rfsockets(char *topic_ptr, String payload) {
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const char* delimiter = "/";
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topic_ptr = strtok(NULL, delimiter);
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@ -92,14 +134,14 @@ void subsystem_rfsockets(char *topic_ptr, String payload) {
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if (payload.equals(String(LIGHT_ON))) {
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if (sockets[socketIdx].powered != true) {
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sockets[socketIdx].powered = true;
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setLightState(socketIdx);
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publishLightState(socketIdx);
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setSocketState(socketIdx);
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publishSocketState(socketIdx);
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}
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} else if (payload.equals(String(LIGHT_OFF))) {
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if (sockets[socketIdx].powered != false) {
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sockets[socketIdx].powered = false;
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setLightState(socketIdx);
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publishLightState(socketIdx);
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setSocketState(socketIdx);
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publishSocketState(socketIdx);
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}
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} else {
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Serial.print("Unknown payload received: ");
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@ -145,6 +187,7 @@ void callback(char* p_topic, byte* p_payload, unsigned int p_length) {
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}
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}
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// handles initial connection and reconnect in case of failures
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void reconnect() {
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// Loop until we're reconnected
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while (!client.connected()) {
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@ -153,7 +196,7 @@ void reconnect() {
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if (client.connect(MQTT_CLIENT_ID)) {
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Serial.println("INFO: connected");
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for (int i = 0; i < numofsockets; i++) {
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publishLightState(i);
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publishSocketState(i);
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}
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for (int i = 0; i < numofsockets; i++) {
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char *socket_name = sockets[i].name;
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@ -261,6 +304,10 @@ void setup() {
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Serial.print("IP address: ");
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Serial.println(WiFi.localIP());
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// setup bh1750 sensor
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Wire.begin();
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lightMeter.begin();
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// init the MQTT connection
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client.setServer(MQTT_SERVER_IP, MQTT_SERVER_PORT);
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client.setCallback(callback);
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@ -271,4 +318,10 @@ void loop() {
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reconnect();
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}
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client.loop();
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if(abs(millis() - last_bh1750_publish) >= 5000){
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Serial.println("Publishing BH1750 state");
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publishBH1750State();
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last_bh1750_publish = millis();
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}
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}
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