- NodeMCU-ESP8266开发板
- lcd1602显示屏（使用I2C总线）
- 杜邦线若干
- 可以联网的WiFi信号
- Arduino IDE
- 心知天气API（免费版够用）
- GPIO4——SDA
- GPIO5——SCL
- VCC——3.3V
- GND——GND
| GPIO | Function | State | Restrictions |
|---|---|---|---|
| 0 | Boot mode select | 3.3V | No Hi-Z |
| 1 | TX0 | - | Not usable during Serial transmission |
| 2 | Boot mode select TX1 | 3.3V (boot only) | Don’t connect to ground at boot time Sends debug data at boot time |
| 3 | RX0 | - | Not usable during Serial transmission |
| 4 | SDA (I²C) | - | - |
| 5 | SCL (I²C) | - | - |
| 6 - 11 | Flash connection | x | Not usable, and not broken out |
| 12 | MISO (SPI) | - | - |
| 13 | MOSI (SPI) | - | - |
| 14 | SCK (SPI) | - | - |
| 15 | SS (SPI) | 0V | Pull-up resistor not usable |
| 16 | Wake up from sleep | - | No pull-up resistor, but pull-down instead Should be connected to RST to wake up |