Introduction to NodeMCU and ESP8266

1. NodeMCU
ESP8266 dev board

2. ESP8266

3. ESP8266
• 32-bit RISC CPU: Tensilica Xtensa LX106 running at 80 MHz
• 64 KiB of instruction RAM, 96 KiB of data RAM
• External QSPI flash - 512 KiB to 4 MiB
• IEEE 802.11 b/g/n Wi-Fi
• WEP or WPA/WPA2 authentication, or open networks
• 16 GPIO pins
• SPI, I²C,
• I²S interfaces with DMA (sharing pins with GPIO)
• UART on dedicated pins, plus a transmit-only UART can be enabled on GPIO2
• 1x10-bit ADC
• 3xPWM

4. NodeMCU
• Official NodeMCU firmware – LUA
• Micropython – Python 3
• Espruino - Javascript
• Arduino
• Official ESP 8266 SDK
• Adafruit etc.

5. Pros
• Price $3 - $8
• Functionality
• Community
• Event loop
• Stability/memory
• Number of GPIO
• Event loop
• 3.3V
Cons

6. Docs - http://www.nodemcu.com/docs/

7. Tools
• Binary firmware
• http://frightanic.com/nodemcu-custom-build/
• NodeMCU Flasher
• https://github.com/nodemcu/nodemcu-flasher
• IDE – ESPlorer
• https://github.com/4refr0nt/ESPlorer

8. NodeMCU – custom firmware

9. Flash
• Flash button