Hey - I have just about finished my set up for a humidity/temp reader but am not getting readings to my home assistant. I’ve followed tons of instruction and have hit an unforeseen roadblock. Is anyone able to determine what I might be missing here? Thank you tons in advance.
Arduino code for node mcu. I DO get readings to the arduino app so I know the node is functioning at least.
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include "DHT.h"
#include <ArduinoJson.h>
#define MQTT_VERSION MQTT_VERSION_3_1_1
// Wifi: SSID and password
const char* WIFI_SSID = "and Yoko";
const char* WIFI_PASSWORD = "lifeinprison";
// MQTT: ID, server IP, port, username and password
const PROGMEM char* MQTT_CLIENT_ID = "DHT22-1";
const PROGMEM char* MQTT_SERVER_IP = "192.168.0.105";
const PROGMEM uint16_t MQTT_SERVER_PORT = 1883;
const PROGMEM char* MQTT_USER = "mqtt_admin";
const PROGMEM char* MQTT_PASSWORD = "beatles";
// MQTT: topic
const PROGMEM char* MQTT_SENSOR_TOPIC = "DHT22-1/sensor1";
// DHT - D1/GPIO5
#define DHTPIN D2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
WiFiClient wifiClient;
PubSubClient client(wifiClient);
long lastMsg = 0;
int sleepSeconds = 10;
// function called to publish the temperature and the humidity
void publishData(float p_temperature, float p_humidity) {
// create a JSON object
// doc : https://github.com/bblanchon/ArduinoJson/wiki/API%20Reference
StaticJsonBuffer<200> jsonBuffer;
JsonObject& root = jsonBuffer.createObject();
// INFO: the data must be converted into a string; a problem occurs when using floats...
root["temperature"] = (String)p_temperature;
root["humidity"] = (String)p_humidity;
root.prettyPrintTo(Serial);
Serial.println("");
char data[200];
root.printTo(data, root.measureLength() + 1);
client.publish(MQTT_SENSOR_TOPIC, data, true);
yield();
}
// function called when a MQTT message arrived
void callback(char* p_topic, byte* p_payload, unsigned int p_length) {
}
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.println("INFO: Attempting MQTT connection...");
// Attempt to connect
if (client.connect(MQTT_CLIENT_ID, MQTT_USER, MQTT_PASSWORD)) {
Serial.println("INFO: connected");
} else {
Serial.print("ERROR: failed, rc=");
Serial.print(client.state());
Serial.println("DEBUG: try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}
void setup() {
// init the serial
Serial.begin(115200);
dht.begin();
// init the WiFi connection
Serial.println();
Serial.println();
Serial.print("INFO: Connecting to ");
WiFi.mode(WIFI_STA);
Serial.println(WIFI_SSID);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("INFO: WiFi connected");
Serial.println("INFO: IP address: ");
Serial.println(WiFi.localIP());
// init the MQTT connection
client.setServer(MQTT_SERVER_IP, MQTT_SERVER_PORT);
client.setCallback(callback);
}
void loop() {
if (!client.connected()) {
reconnect();
}
client.loop();
long now = millis();
// Send a message every minute
if (now - lastMsg > 1000 * sleepSeconds) {
lastMsg = now;
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
if (isnan(h) || isnan(t)) {
Serial.println("ERROR: Failed to read from DHT sensor!");
return;
} else {
publishData(t, h);
}
}
}
MQTT 5:
{
"logins": [
{
"username": "mqtt_admin",
"password": "beatles"
}
],
"anonymous": false,
"customize": {
"active": true,
"folder": "mosquitto"
},
"certfile": "fullchain.pem",
"keyfile": "privkey.pem"
}
configuration.yaml:
# Configure a default setup of Home Assistant (frontend, api, etc)
default_config:
# Uncomment this if you are using SSL/TLS, running in Docker container, etc.
# http:
# base_url: example.duckdns.org:8123
# Text to speech
tts:
- platform: google_translate
group: !include groups.yaml
automation: !include automations.yaml
script: !include scripts.yaml
sensor 1:
platform: mqtt
state_topic: 'DHT22-1/sensor1'
name: 'Temperature'
unit_of_measurement: '°F'
value_template: '{{ value_json.temperature }}'
/usr/share/hassio/share/mosquitto/accesscontrollist
user mqtt_admin
topic readwrite #
user homeassistant
topic readwrite #
/usr/share/hassio/share/mosquitto/acl.conf
acl_file /share/mosquitto/accesscontrollist