Display different Roomtemperature on MagicMirror

[wishmaster270]

@Xilef
ESP8266 is a good choice. I prefer ESP32 cause it has more power but does not need that much more energy. You have a lot more GPIOs with a ESP32 than a with the ESP8266.

I can provide you a ESP32 sketch which is ready to flash and only needs the Wifi-SSID, Wifi-Password and the MQTT parameters configured.
I use the Arduino IDE to flash the boards.

[Xilef]

@wishmaster270 thanks

As I understand it, something like this is my target:

And i would need:

• ESP32
• DHT11-Sensor Problem with this Sensor is the accuracy i think, but if it works I can swap them out I guess
• BreadBoard

And as Powersupply something with 5V and 1-1,5A right?

I would probably do it like this guy on youtube https://www.youtube.com/watch?v=ebJpXs2-WgM&list=PLUwa0e4GQGhS6KCSbLAQGog4_Z7eIWOm3&index=3

And from the ESP32-Website the MagicMirror should be able to read the data and display it

[wishmaster270]

@Xilef
You need a ESP32 ( I use a D1 Mini but nearly everyone should be fine)
You need a Temperature and Humidity Sensor (BME280 and HTU21 are a lot more accurate and use I2c to communicate with the controller.
A Power supply with 5V 1A should be more than enough.

That’s how I display my values…

The first three are ESP32 the others my thermostats.

[JerryP]

@wishmaster270

nice…

[Xilef]

@wishmaster270 Thats exactly what i had in mind

The BME280 sensors on amazon are a litte expensive so Im think Im order 3 form this shop They have 5 Pins but I think this will work to, on Aliexpress its even cheaper but i have no experience with the shop, and 1-3€ difference is ok i guess

And I wanted to ask what power supply you use e.g. just a cell phone charger?
I think im gona go with this one and hope that it doesnt explode

So if I have everything right this is my shopping list:
ESP32
BME280
Power Supply
BreadBoard

And then I just have to figure out the programming

[Xilef]

Edit: With Power Supply i mean this one: https://www.amazon.de/gp/product/B08LMFBV55/ref=ox_sc_act_title_2?smid=A1XVC08L2WVJCV&psc=1

[wishmaster270]

@Xilef Hi, the list sounds good. I use old mobile chargers to power the boards. I have heard that some had problems with mobile chargers but I had no problems for years now.

[Xilef]

Hey im back @wishmaster270

my parts arrived, and after 5 hours of Troubleshooting i was able to achieve this: (with the help of this tutorial)

Now i need just a little bit help to display the Temperature and Humidity on my mirror

[wishmaster270]

@Xilef
Hi,
thats great news.
The screenshot shows that you setup the ESP32 and the sensor correctly.
The main problem is that the ESP now displays a webpage.
There are two possible ways now. Either you embed the webpage (as it is) into the mirror with a module like MMM-EmbedURL or to get the ESP to display the data machine readable.
Maybe the sketch you flashed to the ESP already contains a way to read the data in a different format? Which one did you use?

Edit: I think it is this one, am i right? Then there is no easy way.
I think i can provide a sketch that is more “mirror friendly” but you will need to set a static IP for the ESP. Is this ok for you?

You will need to change to your needs:

• ##ADD_WIFI_SSID_HERE
• ##ADD_WIFI_PASSWORD_HERE
• IPAddress local_IP(192, 168, 0, 2);
• IPAddress gateway(192, 168, 0, 1);
• IPAddress subnet(255, 255, 255, 0);
• IPAddress primaryDNS(192, 168, 0, 1);

#include <WiFi.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

const char* ssid     = "##ADD_WIFI_SSID_HERE";
const char* password = "##ADD_WIFI_PASSWORD_HERE";

//ENTER STATIC IP OF THE ESP32 BOARD HERE
IPAddress local_IP(192, 168, 0, 2);
IPAddress gateway(192, 168, 0, 1);
IPAddress subnet(255, 255, 255, 0);
IPAddress primaryDNS(192, 168, 0, 1);
IPAddress secondaryDNS(8, 8, 8, 8);

Adafruit_BME280 bme;

WiFiServer server(80);

void setup()
{
  Wire.begin();
  Serial.begin(115200);

  if (!WiFi.config(local_IP, gateway, subnet, primaryDNS, secondaryDNS)) {
    Serial.println("STA Failed to configure");
  }

  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected!");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
  Serial.print("ESP Mac Address: ");
  Serial.println(WiFi.macAddress());
  Serial.print("Subnet Mask: ");
  Serial.println(WiFi.subnetMask());
  Serial.print("Gateway IP: ");
  Serial.println(WiFi.gatewayIP());
  Serial.print("DNS: ");
  Serial.println(WiFi.dnsIP());

  if (!bme.begin(0x76);) {
    Serial.println("Couldn't find sensor!");
    while (1);
  }

  server.begin();
}

void loop()
{
  float temp = bme.readTemperature();
  float tempf = temp * 1.8 + 32;
  float rel_hum = bme.readHumidity();

  WiFiClient client = server.available();
  if (client) {
    Serial.println("New Client."); 
    client.println("{");
    client.print("  \"temperature_c\": ");
    client.print(temp);
    client.println(",");
    client.print("  \"temperature_f\": ");
    client.print(tempf);
    client.println(",");
    client.print("  \"humidity\": ");
    client.print(rel_hum);
    client.println(",");
    client.println("  \"error\": false");
    client.println("}");
    client.stop();
    Serial.println("Client disconnected.");
    Serial.println("");
  }
  delay(100);
}

You can use netcat to fetch the data:

/bin/nc -w3 THE_IP_OF_THE_ESP 80

And the result will be something like:

{
   "humidity": 32.61236572265625,
   "temperature_c": 25.50150878906249, 
   "temperature_f": 77.9027158203125, 
   "error": false
}

This kind of JSON object then can be read by my MMM-Temperature module.

[sdetweil]

@wishmaster270 I created a sketch for my 8266, which is a json get. returns current temp and humidity.

then I just fetch it when I want, similar to what u did