The program in my Arduino IDE application cannot connect to the server. Where I use ESP8266. (If (!client.connect(host,80)) )

FAQ
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This is the result :pray:

Capture1
Capture11107×642 32.4 KB

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To the platformio.ini not in the terminal

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Do you mean I add build_flags = -DCORE_DEBUG_LEVEL=5 to Arduino IDE application, then upload it to EPS8266?

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In the PlatformIO project, not in the Arduino IDE, you have a file called platformio.ini where you can add the line build_flags = -DCORE_DEBUG_LEVEL=5. If you are using the Arduino IDE, use Tools → Core Debug Level → 5 (Verbose) option and reupload