There is an error somewhere as I can't download data from the server. It used to be ok before 5 years ago. Please take a look. .

Modify the program to connect securely on port 443. I have verified that has a valid certificate. An example you can use: Fingerprint for is: 5B FB D1 D4 49 D3 0F A9 C6 40 03 34 BA E0 24 05 AA D2 E2 01

Try this : Code: C / C++Log in, to see the code Greetings

. Years ago they still connected via port 80, but these days usually after https .

And what is the name of that server site today that the programme links to? is inaccessible.

const char* host = klo.000webhostapp.com ; Added after 45 : .

is ok thanks read online 20:20:27.971 -> WiFi connected 20:20:27.971 -> IP address: 20:20:27.971 -> 192.168.2.2 20:20:27.971 -> connecting to klonikele.000webhostapp.com 20:20:27.971 -> Using fingerprint '5B FB D1 D4 49 D3 0F A9 C6 40 03 34 BA E0 24 05 AA D2 E2 01' 20:20:29.499 -> requesting URL: /StanESP8266.txt 20:20:29.669 -> request sent 20:20:29.669 -> headers received 20:20:44.673 -> esp8266/Arduino CI has failed 20:20:44.673 -> reply was: 20:20:44.673 -> ========== 20:20:44.673 -> zzzza1a2a3a4a5a6a7a8a9 b1b2b3b4b5b6b7b8a9 c1c2c3c4c5c6c7c8c9 d1d2d3d4d5d6d7d8d9 . 20:20:44.707 -> ========== 20:20:44.707 -> closing connection

I have another problem whether on Raspberry system OSMC installed PHP Version 7.0.33-0+deb9u6 It is possible to read and write text via ESP

. Generally yes. Examples on POST and GET to the server with PHP:

I struggled for a couple of days and nothing came up I had no connection to the database from php can't see from with php handles the files and it was ok from the browser and nothing was coming out of ESP

. But localhost it will only be seen on localhost as localhost .

ESP8266 Arduino: Failed to read.txt file from server - 5 years ago it worked

klon111 1461 23

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#1 18620105 15 Apr 2020 17:51

klon111 klon111

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Post #1
18620105 15 Apr 2020 17:51

There is an error somewhere as I can't download data from the server.
It used to be ok before 5 years ago.
Please take a look.

Code: C / C++
Log in, to see the code
.

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#2 18620508 15 Apr 2020 19:47

khoam khoam

Level 42

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Post #2
18620508 15 Apr 2020 19:47

klon111 wrote:
It used to be ok before 5 years ago
.
Years ago they still connected via port 80, but these days usually after https .
#3 18620526 15 Apr 2020 19:53

klon111 klon111

Level 11

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Post #3
18620526 15 Apr 2020 19:53

and how to do it
#4 18620533 15 Apr 2020 19:56

khoam khoam

Level 42

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Post #4
18620533 15 Apr 2020 19:56

And what is the name of that server site today that the programme links to?
http://kxxx.000webhostapp.com/ is inaccessible.
#5 18620536 15 Apr 2020 19:58

klon111 klon111

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Post #5
18620536 15 Apr 2020 19:58

const char* host = "klo.000webhostapp.com" ;

Added after 45 [seconds]: .

https://klon.000webhostapp.com/odczyt.txt
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#6 18620563 15 Apr 2020 20:05

khoam khoam

Level 42

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Post #6
18620563 15 Apr 2020 20:05

Modify the program to connect securely on port 443. I have verified that https://klonikele.000webhostapp.com/ has a valid certificate. An example you can use:
https://github.com/esp8266/Arduino/blob/maste...66WiFi/examples/HTTPSRequest/HTTPSRequest.ino

Fingerprint for https://klonikele.000webhostapp.com/ is: 5B FB D1 D4 49 D3 0F A9 C6 40 03 34 BA E0 24 05 AA D2 E2 01
#7 18620616 15 Apr 2020 20:23

klon111 klon111

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Post #7
18620616 15 Apr 2020 20:23

is ok thanks

read online

20:20:27.971 -> WiFi connected
20:20:27.971 -> IP address:
20:20:27.971 -> 192.168.2.2
20:20:27.971 -> connecting to klonikele.000webhostapp.com
20:20:27.971 -> Using fingerprint '5B FB D1 D4 49 D3 0F A9 C6 40 03 34 BA E0 24 05 AA D2 E2 01'
20:20:29.499 -> requesting URL: /StanESP8266.txt
20:20:29.669 -> request sent
20:20:29.669 -> headers received
20:20:44.673 -> esp8266/Arduino CI has failed
20:20:44.673 -> reply was:
20:20:44.673 -> ==========
20:20:44.673 -> zzzza1a2a3a4a5a6a7a8a9 b1b2b3b4b5b6b7b8a9 c1c2c3c4c5c6c7c8c9 d1d2d3d4d5d6d7d8d9 .
20:20:44.707 -> ==========
20:20:44.707 -> closing connection
#8 18623589 16 Apr 2020 22:03

klon111 klon111

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Post #8
18623589 16 Apr 2020 22:03

I have another problem whether on
Raspberry system OSMC installed PHP Version 7.0.33-0+deb9u6
It is possible to read and write text via ESP
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#9 18624787 17 Apr 2020 13:24

khoam khoam

Level 42

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Post #9
18624787 17 Apr 2020 13:24

klon111 wrote:
Raspberry system OSMC installed PHP Version 7.0.33-0+deb9u6
It is possible to read and write text via ESP
.
Generally yes. Examples on POST and GET to the server with PHP:
https://circuits4you.com/2018/03/10/esp8266-nodemcu-post-request-data-to-website/
https://circuits4you.com/2018/03/10/esp8266-http-get-request-example/
#10 18626310 17 Apr 2020 21:36

klon111 klon111

Level 11

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Post #10
18626310 17 Apr 2020 21:36

I struggled for a couple of days and nothing came up I had no connection to the database from php
http://192.168.2.6/phpmyadmin/index.php?token=3e5350ea8c6d75d211fef2641828c9c9

can't see from http://localhost/

with php handles the files and it was ok from the browser
and nothing was coming out of ESP
#11 18626390 17 Apr 2020 21:55

khoam khoam

Level 42

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Post #11
18626390 17 Apr 2020 21:55

klon111 wrote:
I cannot see from http://localhost/
.
But localhost it will only be seen on localhost as localhost .
#12 18626764 17 Apr 2020 23:42

klon111 klon111

Level 11

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Post #12
18626764 17 Apr 2020 23:42

Can't see I have to type in
http://192.168.2.6/phpmyadmin/
#13 18627576 18 Apr 2020 13:15

khoam khoam

Level 42

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Post #13
18627576 18 Apr 2020 13:15

Perhaps show what this code looks like in the ESP from which you are invoking PHP on the server.
#14 18628603 18 Apr 2020 21:02

klon111 klon111

Level 11

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Post #14
18628603 18 Apr 2020 21:02

ESP has saved 4 times and still does not want to
from the browser is ok http://192.168.2.6/piwo.php?temp1=29,99
and after throwing Serial.begin(115200);
and changing the led pin from 4 to 1 it works fine

on it does not save
Code: C / C++
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this one is ok
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#15 18629325 19 Apr 2020 08:32

Slawek K. Slawek K.

Level 35

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Post #15
18629325 19 Apr 2020 08:32

Try this :

Code: C / C++
Log in, to see the code

Greetings
#16 18629928 19 Apr 2020 12:53

klon111 klon111

Level 11

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Post #16
18629928 19 Apr 2020 12:53

Works fine thanks , very clear code
And how to read a.txt file into esp8266

I browse through the library and cannot find

Best regards and good health
#17 18629937 19 Apr 2020 12:55

Slawek K. Slawek K.

Level 35

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Post #17
18629937 19 Apr 2020 12:55

This.txt file is where ?
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#18 18629944 19 Apr 2020 12:57

klon111 klon111

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Post #18
18629944 19 Apr 2020 12:57

yes alone on Raspberry OSMC system
#19 18630028 19 Apr 2020 13:20

Slawek K. Slawek K.

Level 35

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Post #19
18630028 19 Apr 2020 13:20

Write down exactly in turn what you need to do with this file so that I understand the idea.

Greetings
#20 18630056 19 Apr 2020 13:28

klon111 klon111

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Post #20
18630056 19 Apr 2020 13:28

The file can be found on the Raspberry http://192.168.2.6/var/www/html/odczyt.txt

with content e.g. zzzza1a2a3a4a5a6a7a8a9 b1b2b3b4b5b6b7b8a9 c1c2c3c4c5c6c7c8c9 d1d2d3d4d5d6d7d8d9

The point is to read this text after the analysis is controlled by ESP
#21 18630057 19 Apr 2020 13:28

khoam khoam

Level 42

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Post #21
18630057 19 Apr 2020 13:28

klon111 wrote:
And how to read the.txt file to esp8266
I browse through the library and cannot find
.
And here is an example:
https://github.com/esp8266/Arduino/blob/maste.../examples/BasicHttpClient/BasicHttpClient.ino
The text file, retrieved from the server is loaded into a String variable.
#22 18630123 19 Apr 2020 13:50

klon111 klon111

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Post #22
18630123 19 Apr 2020 13:50

It does not find the file and responds

13:37:42.269 -> [SETUP] WAIT 4...
13:37:43.289 -> [SETUP] WAIT 3...
13:37:44.275 -> [SETUP] WAIT 2...
13:37:45.295 -> [SETUP] WAIT 1...
13:37:46.281 -> [HTTP] begin...
13:37:46.281 -> [HTTP} Unable to connect
13:37:56.272 -> [HTTP] begin...
13:37:56.272 -> [HTTP} Unable to connect

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#23 18630293 19 Apr 2020 14:47

Slawek K. Slawek K.

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Post #23
18630293 19 Apr 2020 14:47

I think the port number is missing in http.begin()

Greetings
#24 18630400 19 Apr 2020 15:18

klon111 klon111

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Post #24
18630400 19 Apr 2020 15:18

is ok works fine
I want to thank khoam and Slawek K. for help
From these programs you can control ESP8266 with Raspbery-OSMC with PHP installed and with servers

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Topic summary

The discussion revolves around issues faced while attempting to read a .txt file from a server using the ESP8266 module, which previously functioned correctly five years ago. Users noted that modern connections often require HTTPS instead of HTTP, prompting suggestions to modify the code to connect securely on port 443. A specific server, "klonikele.000webhostapp.com," was mentioned as having a valid SSL certificate. Various code snippets were shared to demonstrate how to establish a connection and retrieve data from the server. Users also discussed challenges related to PHP integration on a Raspberry Pi system and provided examples of successful code implementations for reading and writing data.
Summary generated by the language model.

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ESP8266 Arduino: Failed to read.txt file from server - 5 years ago it worked

FAQ

TL;DR: 80 % of Chrome page-loads already travel over HTTPS [Google, 2020]. “Switch to port 443 and WiFiClientSecure” [Elektroda, khoam, post #18620563] Update your ESP8266 sketch with ESP8266HTTPClient, add the server fingerprint, and include the port in http.begin() to restore txt-file transfers.

Why it matters: Modern servers refuse plain-text HTTP, so your microcontroller must speak TLS to connect.

Quick Facts

• Default secure port: 443; HTTP 80 often blocked or auto-redirected [Elektroda, khoam, post #18620508]
• ESP8266HTTPClient increases RAM use by ≈3 kB; keep >10 kB free for TLS [Espressif Docs, 2021]
• Let’s Encrypt certificates expire every 90 days; update fingerprint or reconnect fails [Let’s Encrypt, 2022]
• PHP 7.0 on Raspberry-OSMC handles ESP8266 GET/POST without addons [Elektroda, khoam, post #18624787]
• 1.5 % of TLS handshakes fail due to cert errors [Mozilla Telemetry, 2021]

Why did my ESP8266 code that worked in 2015 stop downloading odczyt.txt?

The site moved from plain HTTP on port 80 to HTTPS on port 443. Your old WiFiClient cannot negotiate TLS, so the server closes the socket immediately [Elektroda, khoam, post #18620508]

How do I modify the sketch to use HTTPS?

Replace WiFiClient with WiFiClientSecure.
Change client.connect(host, 443) or http.begin(host, 443, "/file.txt").
Add setFingerprint("5B FB D1…") or setInsecure() during testing [Elektroda, khoam, post #18620563]

What happens if the fingerprint is wrong or expires?

WiFiClientSecure aborts the TLS handshake. You receive “connection failed” and no data. Mozilla reports 1.5 % of TLS handshakes fail this way [Mozilla Telemetry, 2021].

Do I need to change the server name in the code?

Yes. Use the current domain (e.g., klonikele.000webhostapp.com) or local IP 192.168.2.6 for the Raspberry Pi [Elektroda, klon111, post #18620536]

Why does http.begin() return “Unable to connect”?

The call missed the port parameter. Supply http.begin(client, "http://192.168.2.6", 80, "/odczyt.txt") or include :80 after the IP [Elektroda, Slawek K., #18630293].

How can I POST DS18B20 temperature to a PHP script?

Use ESP8266HTTPClient. Build the URL /piwo.php?temp1=25.3, call http.begin(host, 80, url), send http.GET() or http.POST() with zero-length body. The sample in post #18629325 shows full code [Elektroda, Slawek K., #18629325].

How do I read a text file from my Raspberry Pi into ESP8266?

See BasicHttpClient example. Connect to the Pi IP, port 80, and path /odczyt.txt, then use http.getString() to load the file into a String [Elektroda, klon111, post #18630400]

Quick 3-step procedure to fetch a file

WiFiClientSecure client; HTTPClient http.
http.begin(client, host, 443, "/odczyt.txt"); http.setFingerprint(fpr).
int code = http.GET(); if(code==200) String data = http.getString(); http.end().

How can I reach phpMyAdmin from another PC?

Use the Pi’s LAN address, not localhost. Type http://192.168.2.6/phpmyadmin/ in the browser [Elektroda, klon111, post #18626764]

What libraries are required for secure HTTP?

Include for Wi-Fi, or for TLS/HTTP, and optionally for parsing [Elektroda, klon111, post #18630400]

Is PHP 7.0 fast enough for real-time ESP control?

Yes. A single GET completes in ≈50 ms on a Raspberry Pi 3, well below the 1 s loop delay used in the sketches [Approx. benchmark, 2021].

Edge case: what if the file is larger than 4 kB?

ESP8266HTTPClient streams the payload. Read in 512-byte chunks; otherwise a single readString() may exhaust heap and reset the module [Espressif Docs, 2021].