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NodeMCU

README.md

WiFi Internet Development Board

* Brand: KeeYees
* Available on Amazon: https://www.amazon.com/gp/product/B07S5Z3VYZ
* WiFi Module: ESP-12E
* WiFi Microchip: ESP8266
* USB Interface: CP2102
* Firmware: NodeMCU (written in C and programmable with Lua)

Program WiFi dev board via CLI

  1. Setup Arduino IDE
  2. Additional Board Manager: Download package_esp8266com_index.json and replace arduino-1.8.10/hardware/package_index_bundled.json with it. 
    # Here is a python script to combine two json files
import json
with open('package_esp8266com_index.json', 'r') as fr: ESP8266 = json.loads(fr.read())
with open('package_index_bundled.json'   , 'r') as fr: OLD     = json.loads(fr.read())
OLD['packages'].append(ESP8266['packages'][0])
with open('package_index_bundled.json'  , 'w') as fw: fw.write(json.dumps(OLD))
  3. Install Board [1]:
$ cd arduino-1.8.10
$ ./arduino --install-boards esp8266:esp8266
  1. Test the Blink.ino
$ ./arduino --port /dev/ttyUSB0 --upload examples/01.Basics/Blink/Blink.ino  --board 'esp8266:esp8266:nodemcuv2:baud=921600'

GUI

  1. Get the virtual COM port (VCP) driver from Silicon Labs
  2. Enter https://arduino.esp8266.com/stable/package_esp8266com_index.json into the File>Preferences>Additional Boards Manager URLs field of the Arduino IDE.
  3. Open Boards Manager from Tools > Board menu and install esp8266 platform
  4. Board name: NodeMCU 1.0 (ESP-12E Module)

Pinout (image source)

Example

  1. Wire BNO055 compass up with NodeMCU
  2. Program BNO055 with this ino
    • Don't forget tweak the parameter (WIFI SSID and password).
  3. Setup a TCP server in LAN to receive sensor readings.
    • It is a python server.
    • You may like to adjust rate of sensor reporting in ino. It reports 30 times per second by default.