一、刷机环境说明

项目	Value
电脑	macOS Mojave版本10.14.3
单片机	ESP8266-12F(集成microUSB烧录串口，2.4Gwifi)
烧录数据线	Kindle Paper White 3 数据线（兼具数据传输和充电与一体，nice）
microPython固件	esp8266-1m-20200902-v1.13.bin（下载地址：https://micropython.org/download/）
烧录软件	NodeMCU-PyFlasher-4.0.dmg（下载地址：https://github.com/marcelstoer/nodemcu-pyflasher）

二、刷机流程

1、下载mac烧录工具 esptool

我本机自带的python为2.7.10：

?   python
Python 2.7.10 (default, Aug 17 2018, 19:45:58) 
[GCC 4.2.1 Compatible Apple LLVM 10.0.0 (clang-1000.0.42)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>

此前，也已经安装了python3.x：

?   python3
Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 05:52:31) 
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>

使用如下命令，下载烧录工具：

?  micropython-1.16 pip3 install esptool
Requirement already satisfied: esptool in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages
Requirement already satisfied: bitstring>=3.1.6 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from esptool)
Requirement already satisfied: cryptography>=2.1.4 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from esptool)
Requirement already satisfied: ecdsa>=0.16.0 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from esptool)
Requirement already satisfied: pyserial>=3.0 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from esptool)
Requirement already satisfied: reedsolo<=1.5.4,>=1.5.3 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from esptool)
Requirement already satisfied: cffi>=1.12 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from cryptography>=2.1.4->esptool)
Requirement already satisfied: six>=1.9.0 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from ecdsa>=0.16.0->esptool)
Requirement already satisfied: pycparser in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from cffi>=1.12->cryptography>=2.1.4->esptool)
You are using pip version 9.0.3, however version 21.2.3 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
?  micropython-1.16

2、查询esp8266 tty串口信息

ls /dev/
如图所示：
在这里插入图片描述

3、正式刷机

在这里插入图片描述
整个刷机时间大概持续1分钟（不像一些同学说的会耗时很久），可以接受：

刷机执行的是这条命令：
esptool.py --port /dev/cu.wchusbserial1420 --baud 115200 --after no_reset write_flash --flash_mode dio 0x00000 /Users/david/Downloads/esp8266-1m-20200902-v1.13.bin --erase-all

命令执行日志如下：

Command: esptool.py --port /dev/cu.wchusbserial1420 --baud 115200 --after no_reset write_flash --flash_mode dio 0x00000 /Users/david/Downloads/esp8266-1m-20200902-v1.13.bin --erase-all

esptool.py v2.6
Serial port /dev/cu.wchusbserial1420
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
MAC: 30:83:98:a3:2b:2e
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 4MB
Erasing flash (this may take a while)...
Chip erase completed successfully in 9.9s
Flash params set to 0x0240
Compressed 588040 bytes to 388655...
Wrote 588040 bytes (388655 compressed) at 0x00000000 in 35.0 seconds (effective 134.5 kbit/s)...
Hash of data verified.

Leaving...
Staying in bootloader.

Firmware successfully flashed. Unplug/replug or reset device 
to switch back to normal boot mode.

至此，刷机流程结束。

三、测试刷机是否成功

请根据自己机器情况，尝试连接入开发板：
? micropython-1.16 screen /dev/tty.wchusbserial1420 115200
在这里插入图片描述
如果看到如上效果，恭喜您，说明您的开发板esp8266-12f已经成功刷入microPython环境，请开启您的物联网探索之旅吧！