硬件准备
本文采用的是安信可的ESP-12模组,其包含一片4Mflash。
相关模组参数及资料请到安信可官网http://www.ai-thinker.com/查阅。
USB转TTL模块
请务必按照下图的接线方式进行连接
| 串口模块 | ESP-12 | ESP-12管脚描述 |
|---|---|---|
| REST | 外部Reset信号，低电平复位，高电平工作（默认高）； | |
| 3.3V | CH_PD | 1）高电平工作2）低电平模块供电关掉 |
| 3.3V | VCC | 3.3V，模块供电 |
| RX | TX | 1）UART_TXD，发送2）开机时禁止下拉 |
| TX | RX | UART_RXD，接收 |
| GND | GPIO0 | 1）默认WiFi Status：WiFi工作状态指示灯控制信号 2）工作模式选择：上拉：Flash Boot， 工作模式下拉： UART Download，下载模式 |
| GND | GPIO15 | 下拉：工作模式 |
| GND | GND | GND |
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