让esp01s正确进入刷机模式

{"ops":[{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b2.sanwen.net/b_article/watermark/89c9d7b07737ec0296ed0a908a7b6bab4591be49.jpg","width":1734,"height":2312,"size":2844111,"status":"loaded"}}},{"insert":"昨天做hass吸顶灯用到了esp01s，刷机这一块瞎琢磨了一阵子，找出了连线规则。这里单独介绍一下连线规则，"},{"attributes":{"color":"#ff6699","bold":true},"insert":"规则如下："},{"insert":"\n"},{"attributes":{"color":"#ff6699","bold":true},"insert":"esp01s——————usb to ttl"},{"attributes":{"align":"justify"},"insert":"\n"},{"attributes":{"color":"#ff6699","bold":true},"insert":"3v3 —— 3v3"},{"attributes":{"align":"justify"},"insert":"\n"},{"attributes":{"color":"#ff6699","bold":true},"insert":"gnd —— gnd"},{"attributes":{"align":"justify"},"insert":"\n"},{"attributes":{"color":"#ff6699","bold":true},"insert":"txd —— rxd"},{"attributes":{"align":"justify"},"insert":"\n"},{"attributes":{"color":"#ff6699","bold":true},"insert":"rxd —— txd"},{"attributes":{"align":"justify"},"insert":"\n"},{"attributes":{"color":"#ff6699","bold":true},"insert":"gpio0 —— gnd"},{"attributes":{"align":"justify"},"insert":"\n"},{"attributes":{"color":"#ff6699","bold":true},"insert":"en在刷机时短接一下3v3"},{"attributes":{"align":"justify"},"insert":"\n"},{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b2.sanwen.net/b_article/watermark/1a0b9b429c34559e8c72f7c0545ded3d7d6dda1e.jpg","width":1734,"height":2312,"size":2679252,"status":"loaded"}}},{"insert":"其实昨天是走弯路了，记得以前做esp01时查过"},{"attributes":{"color":"#ff6699","bold":true},"insert":"esp8266手册，上面有esp8266系列产品介绍，同时给出了刷机与应用电路。"},{"insert":"去看那个手册，会方便很多。\n"},{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b2.sanwen.net/b_article/watermark/e21a1f5af252e4079a020f67a38d5f09fe970b19.jpg","width":1541,"height":1156,"size":1266007,"status":"loaded"}}},{"insert":"最后说说为啥按照网上大多数教程不行，提示连接失败。因为网上只提到了GPIO0接地，却未提EN。"},{"attributes":{"color":"#ff6699","bold":true},"insert":"esp01s要想工作，EN必须接收一个高电平信号，否则不会工作"},{"insert":"，这也是我上面说的，刷机时EN要接一下3v3，其实EN保持上拉也是可以的。\n"}]}