am just trying to familiarize myself with using the basic AT commands, but cannot get any response from a website; i tried the example from this post but failed; https://forum.arduino.cc/index.php?topic=404438.msg2781748#msg2781748 OK AT+CIPMUX=1 OK AT+CIPSTATUS STATUS:2 OK AT+CIPSTART=0,"TCP…

Juraj: you call AT+CIPSEND=0,79 and then AT firmware replies with OK and > then AT firmware expects 79 bytes after > ok - i'm really n00b at this. so it has to be exactly 79 bytes or it won't work ? i count (in spreadsheet) that what i typed after the '>'; GET /print/origin.html HTTP/1.0\r\n…

BabyGeezer: ok - i'm really n00b at this. so it has to be exactly 79 bytes or it won't work ? i count (in spreadsheet) that what i typed after the '>'; GET /print/origin.html HTTP/1.0\r\nHost: http://www.blinkenlichten.info\r\n\r\n has 79 characters. is that syntax correct ? remove http:// …

Juraj: remove http:// from the host name argh - i should have noticed that... still getting the same bad request though. (already changed to CIPSEND=0,72) also tried changing HTTP/1.0 to HTTP/1.1 is this message; +IPD,0,311:HTTP/1.1 400 Bad Request Server: nginx ... coming from the ESP…

FWIW: i tried that example again to weathermap.org no Bad Request - but nothing was returned either. 0,CLOSED AT OK AT+CIPSTART=0,"TCP","api.weathermap.org",80 0,CONNECT OK AT+CIPSTATUS STATUS:3 +CIPSTATUS:0,"TCP","185.53.178.8",80,47217,0 OK AT+CIPSEND=0,76 OK > n busy s... Recv 76 byt…

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 sketc…

Juraj: 400 is http response code. it is send from the server if the request is not a valid http request okay, and then the ESP prints out that message based on the 400 code ? Juraj: you can't send \r\n over Serial Monitor. it is not converted send 3 lines from Serial Monitor i see - thank …

got through at last ! Thanks so much. again i forgot to take out the http:// :open_mouth:

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

Projects Networking, Protocols, and Devices

Juraj May 25, 2019, 6:24am 2

you call AT+CIPSEND=0,79 and then AT firmware replies with OK and >
then AT firmware expects 79 bytes after >

Topic		Replies	Views
AT Commands make request to page without extension Hardware Development	5	537	July 16, 2023
AT cmd - CIPSEND, no response after SEND OK Networking, Protocols, and Devices	12	4208	September 23, 2021
esp8266 AT commands Networking, Protocols, and Devices	9	1562	August 8, 2020
Arduino Due + ESP8266 01 + CIPSEND (GET HTTP) Networking, Protocols, and Devices	5	27176	June 2, 2016
ESP8266 e comandi AT Software	1	638	March 28, 2018

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

Related topics