Nodemcu - introduction
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The NodeMCU is an ESP8266 development board that contains a 32-bit RISC CPU, 64KB of instruction RAM, 96KB of data RAM, and external flash memory. It supports WiFi, GPIO pins, SPI, I2C, PWM and ADC interfaces. Official firmware includes Lua, Micropython, and Espruino scripting languages as well as support for Arduino IDE. It is inexpensive, functional, and has a large community supporting its use and development.
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Nodemcu - introduction
- 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
- 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