mycelial technology

ESP8266 with DHT11 and LCD Display

5 August, 2019

I had fun putting together a simple electronics project over the weekend: NodeMCU dev board (ESP8266) with a DHT11 temperature and humidity sensor and DF Robot RGB LCD display.

Black and white photo in portrait orientation showing electronics on a striped table-cloth. A NodeMCU dev board appears in the lower-right, DHT11 sensor in the top-left, and an LCD in the top-right. Text on the display reads: temp: 18.0 and humidity: 64. The display is propped-up by a white pyramid (mycelium) and a wooden floor is just visible in the background.
The basic setup.

The code is quite simple: connect to the local WiFi network and create a UDP server. Respond to UDP requests on port 3210 with a temperature and humidity reading from the sensor. Write the temperature and humidity to the display every two seconds.

Arduino (C++) code: mycognosist/esp8266_dht11_udp

I’ll be using this setup to monitor environmental conditions in my cultivation space. I plan on doing another version with LoRa for the main lab up the road. Will be great to do some remote-sensing from the comfort of my living room.

One thing you can’t see in the photo is the sweet pink pastel backlight. I’d been thinking about lunarpunk aesthetics (thanks to a post by @Jackalope) - and, in particular, how I associate pastel tones with lunarpunk. I wanted to try out pastel colours on this display and ended up checking out the Wikipedia entry on Pastel (color). Lo and behold, it mentions:

There is also a type of goth style called pastel goth which combines the pastel color palette with classical goth fashion elements.

I did not know that. Rad.