내가 산 거
- https://www.aliexpress.com/item/V3-Wireless-module-NodeMcu-4M-bytes-Lua-WIFI-Internet-of-Things-development-board-based-ESP8266-for/32554198757.html?spm=2114.13010608.0.0.c71jFb
- CH340 NodeMcu v3 (1.0)
https://iotbytes.wordpress.com/nodemcu-pinout/
Features
- Wireless 802.11 b / g / n standard
- Support STA / AP / STA + AP three operating modes
- Built-in TCP / IP protocol stack to support multiple TCP Client connections (5 MAX)
- D0 ~ D8, SD1 ~ SD3: used as GPIO, PWM, IIC, etc., port driver capability 15mA
- AD0: 1 channel ADC
- Power input: 4.5V ~ 9V (10VMAX), USB-powered
- Current: continuous transmission: ≈70mA (200mA MAX), Standby: <200uA
- Transfer rate: 110-460800bps
- Support UART / GPIO data communication interface
- Remote firmware upgrade (OTA)
- Support Smart Link Smart Networking
- Working temperature: -40 ℃ ~ + 125 ℃
- Drive Type: Dual high-power H-bridge driver
| GPIO Pin | I/O Index Number |
| GPIO0 | 3 |
| GPIO1 | 10 |
| GPIO2 | 4 |
| GPIO3 | 9 |
| GPIO4 | 2 |
| GPIO5 | 1 |
| GPIO6 | N/A |
| GPIO7 | N/A |
| GPIO8 | N/A |
| GPIO9 | 11 |
| GPIO10 | 12 |
| GPIO11 | N/A |
| GPIO12 | 6 |
| GPIO13 | 7 |
| GPIO14 | 5 |
| GPIO15 | 8 |
| GPIO16 | 0 |
