Micro Weather Station

Micro Weather Station

• Hosts: Brian and Andy
• 2/29/20
• Build a Micro Weather Station using a Wemos D1 Mini, 1.3" OLED display, 3D Printed enclosure

Materials

• Wemos D1 Mini 4M (Not the lite version with 1M)
  • https://docs.wemos.cc/en/latest/d1/index.html
  • You can buy them on Ali Express (takes about 3 weeks) or Amazon (2 days)
  • programmable with Arduino or microPython. We will be using Arduino

• OLED Display 1.3"
  • very common display that can be found on Amazon, eBay or Ali Express
  • uses SH1106 chip so you have to use SH1106 library in your code
  • I2C serial connection
  • pinout is VCC, GND, SCL, SDA
  • example but you can get cheaper: https://www.amazon.com/HiLetgo-Serial-SSH1106-Display-Arduino/dp/B01MRR4LVE/ref=pd_sbs_147_t_0/139-4905825-1461144
  • you can also use a 0.96" screen but that one uses a different chip for the driver so you have to set your code to use the SSD1306. If your screen lights up but screen is garbled then this is the case.

• 3d Printed Enclosure
  • search for "D1 Mini 1.3" on Thingiverse
  • https://www.thingiverse.com/thing:2934049
  • https://www.thingiverse.com/thing:3044478

• Misc
  • Dupont wires - these push onto the header pins.
    • https://www.amazon.com/EDGELEC-Breadboard-Optional-Assorted-Multicolored/dp/B07GD2BWPY/ref=sr_1_1_sspa
  • Solder
  • assorted 2mm self taping screws
  • hot glue
  • donuts and coffee

Instructions

Setup the Wemos D1 mini for the Arduino

• • good tutorial here https://averagemaker.com/2018/03/wemos-d1-mini-setup.html
  • overview
    • install ch340 serial usb drivers
    • install Arduino IDE - not the web version
    • Add the json string to the board manager URLs in file->preferences http://arduino.esp8266.com/stable/package_esp8266com_index.json
    • Set the board in Arduino
    • Get the blink example working

hook up the screen

• Solder dupont headers to 5V, Gnd, D3 and D4 on the Wemos D1 Mini
• connect the other end of dupont headers to oled screen