ESP32 BLE - UART

项目介绍

MicroPython for ESP32 开发板低功耗蓝牙（BLE）研究学习项目的分支项目，使用ESP32开发板通过UART与其它设备交换数据

如何使用呢？

下载并烧录自定义的固件到开发板
如果你用的是官方最新固件的话可以参考不想烧录自定义固件？部分
把项目目录下的main.py和ble文件夹上传到开发板，并运行main.py文件
使用安卓手机下载安装 nRF Connect
在nRF Connect中搜索并连接默认名称为mpy-uart的设备
然后按如下顺序操作：
1. 按一下开发板上的BOOT按键，板载 Led 点亮的同时手机上的TX Characteristic会收到数据on，再次按下按键收到off
2. 手机上点RX Characteristic右侧的上箭头，在弹出的数据发送窗口中发送on，可以点亮开发板的板载 Led

REPL中的完整输出内容如下：

activating ble...
I (12270) BTDM_INIT: BT controller compile version [5aed448]
I (24880) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (24990) phy: phy_version: 4102, 2fa7a43, Jul 15 2019, 13:06:06, 0, 0
GAP procedure initiated: stop advertising.
ble activated
GAP procedure initiated: advertise; disc_mode=2 adv_channel_map=7 own_addr_type=0 adv_filter_policy=0 adv_itvl_min=800 adv_itvl_max=800
advertising...
>>> [79:75:C6:5B:08:1F] connected, handle: 0
GATT procedure initiated: notify; att_handle=3
GATT procedure initiated: notify; att_handle=3
rx received: b'on'
GATT procedure initiated: notify; att_handle=3
[79:75:C6:5B:08:1F] disconnected, handle: 0
GAP procedure initiated: advertise; disc_mode=2 adv_channel_map=7 own_addr_type=0 adv_filter_policy=0 adv_itvl_min=800 adv_itvl_max=800
advertising...