ESP8266 Community Forum

hi guys
so i just finished this new quite complex project with Esp8266 on NodeMCU

a smart box which can do many things:

- open the door and turn light on (through MQTT)
- check if the gate is open (MQTT)
- has 2 status LED
- has a Oled display (128x64px)
- track my 2 websites visitor (through MQTT request and a python script on my raspberry)
- check the temperature and Humidity with a DHT11 module
- has 3 buttons (to open door, turn light, change screen-mode on the display)
- control the room light level (with a LDR module)

so i used all available pin ( i guess)

i just realized that the cpu is really heating... i tried to keep it turned on for about 5/10 minutes but i m quite scared to go longer...
i am powering the device with a dc external supply of 8 volts through the VIN.. but i checked that the device is heating anyway if i power it through the usb port.

what you think about?
am i risking to brick it?

cheers

Does it heat as much when running from the USB?

Exactly which model NodeMCU are you running. Some are better than others when it comes to voltage regulators.

What are you powering the DHT11 and OLED from? (VIN, 5V or 3.3V)

When you have it working, change the DHT11 for at least an AM2302 or something better like the BME280. The DHT11 is evil (ok, just a really crap sensor).