Display different Roomtemperature on MagicMirror

Xilef

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

wishmaster270

@sdetweil Hi Sam, i was to slow with editing my post. The Sketch i provided does exactly that.

Xilef

@wishmaster270 i think thats a good way to to it

@wishmaster270 said in Display different Roomtemperature on MagicMirror:

but you will need to set a static IP for the ESP

So i need to set it manually in the router settings?

@wishmaster270 said in Display different Roomtemperature on MagicMirror:

#include <WiFi.h>…

Thats what i need to flash on the esp , right?

@wishmaster270 said in Display different Roomtemperature on MagicMirror:

/bin/nc -w3 THE_IP_OF_THE_ESP 80

idk what that’s supposed to be for

and you have to explain to me in more detail what I should add to the IPs

wishmaster270

@Xilef
You can but do not have to set the ip in the router. You either need a free address in the range that is NOT used by your routers DHCP server or maybe there is a setting to provide the device always with the same IP in your router. You then can set this IP for the ESP (as it is not used for any other DHCP device in the future then.

the local_ip in the sketch is the IP you choose for the ESP (attention the numbers are separated with , and NOT ..
the gateway is the IP of your router
the subnet depends on your network but 255,255,255,0 will be fine in the most cases
the primaryDNS is usually the IP of you router

yes the “include …” part is the one to be flashed to the ESP.

After you flashed the new Sketch to the ESP and booted it you can use the nc command to fetch the data from the shell of the mirror. The temperature module uses this command to get the data so you can make sure to see if it works without the need to install the module first.

Xilef

@wishmaster270 i guess thats what i need

“Always assign the same IPv4 address to this network device.”

And for the WIFI SSID and Passwort, behind the 2 ## right?

and where do i need to use the nc command? on the esp32 or on the raspberry pi?

wishmaster270

@Xilef
Perfect. This is the right setting.

You need to replace the ##, too.
It will look something like:

const char* ssid     = "MY_WIFI_NETWORK";
const char* password = "123ABC456";

IPAddress local_IP(192, 168, 178, 106);
IPAddress gateway(192, 168, 178, 1);
IPAddress subnet(255, 255, 255, 0);
IPAddress primaryDNS(192, 168, 178, 1);
IPAddress secondaryDNS(8, 8, 8, 8);

To check if everything is set up correctly you can run:

/bin/nc -w3 192.168.178.106 80

Xilef

@wishmaster270 the “/bin/nc -w3 192.168.178.106 80” command on the serial monitor message line?

:/

I would suggest to remove the clamp behind the ; ??

wishmaster270

@Xilef
Sorry, my fault. You need to change line 52 to:

if (!bme.begin(0x76)) {

Copy&Paste mistake of me