使用arduino燒寫esp32模塊遇到的無法燒錄問題，時鍾無法燒錄遇到如下提示
后來搜索在如下連接找到解決方法：
https://github.com/espressif/esptool/issues/226
方法如下：
在界面上出現
Connecting...字樣時候按住boot按鈕即可，等到出現燒錄的時候就可以松開了
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