Playing with AT cmd(ESP-01) - CIPSEND but not getting any response after SEND OK

Projects Networking, Protocols, and Devices
7

400 is http response code. it is send from the server if the request is not a valid http request

you can't send \r\n over Serial Monitor. it is not converted

send 3 lines from Serial Monitor
GET /print/origin.html HTTP/1.0
Host: http://www.blinkenlichten.info
and an empty line

or write a sketch which sends the commands

AT cmd - CIPSEND, no response after SEND OK