Error reading temp.csv

[scalesr1]

Hello, I followed your wonderful article regarding the logging of temperature. I had BMP sensors on hand so modified the code to use those.

Everything compiles OK, the code runs - the serial monitor shows the output as described in your article yet, when I read the page in a browser, I get a message saying 'Loading' and the serial monitor shows 'File Not Found' when sending the web pages etc.

Am i being too hasty? - it has been running for 10 minutes now, or might there be some other issue?

Kind regards

Richard

[scalesr1]

I made a file temp.csv file and put a single line of data which I copied from the serial monitor and uploaded it with the spiffs just in case it was not being created for some reason.
This appears to have remedied the issue. Now I get a graph - albeit with no data (only 1 minute in and only 1 additional line written to the file) - at least now there is no error when requesting the page in a browser.
OH NO!
Now that data has been written to the file - it is no longer found when the page is requested :-(
What might I be doing wrong?
I will get that sensor connected asap so at least the data is correct.
Kind regards

Richard

[scalesr1]

If I restart the micro - the routine which lists the available files does not list temp.csv.
I think I should read your article from the beginning - I umped straight to the temperature logger page!
Kind regards
Richard

[scalesr1]

Panic C:\Users\richard.RCS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2\libraries\ESP8266WiFi\src\include/DataSource.h:93 const uint8_t* BufferedStreamDataSource::get_buffer(size_t) [with TStream = Stream; uint8_t = unsigned char; size_t = unsigned int]: Assertion 'cb == stream_rem' failed.

I get this from time to time.

Kind regards

Richard

[scalesr1]

This is the serial output:

Connected to MFnewWiFi
IP address: 192.168.1.221

OTA ready

SPIFFS started. Contents:
FS File: /edit.html, size: 1.37KB
FS File: /favicon-144x144.png, size: 2.81KB
FS File: /favicon.ico, size: 37.19KB
FS File: /index.html, size: 1.82KB
FS File: /main.css, size: 745B
FS File: /manifest.json, size: 169B
FS File: /success.html, size: 913B
FS File: /temp.csv, size: 26B
FS File: /temperatureGraph.js, size: 5.55KB

mDNS responder started: http://esp8266.local
HTTP server started.
Starting UDP
Local port: 123
Time server IP: 129.6.15.26
Sending NTP request
NTP response: 1699253356
Temperature requested
Appending temperature to file: 1699253357,21474836.00
File was written
handleFileRead: /
Sent file: /index.html
handleFileRead: /temperatureGraph.js
Sent file: /temperatureGraph.js
handleFileRead: /temp.csv
Sent file: /temp.csv
handleFileRead: /favicon.ico
Sent file: /favicon.ico
handleFileRead: /
Sent file: /index.html
handleFileRead: /temperatureGraph.js
Sent file: /temperatureGraph.js
handleFileRead: /temp.csv
Sent file: /temp.csv
handleFileRead: /favicon.ico
Sent file: /favicon.ico
handleFileRead: /
Sent file: /index.html
handleFileRead: /temperatureGraph.js
Sent file: /temperatureGraph.js
handleFileRead: /temp.csv
Sent file: /temp.csv
handleFileRead: /favicon.ico
Sent file: /favicon.ico
handleFileRead: /
Sent file: /index.html
handleFileRead: /temperatureGraph.js
Sent file: /temperatureGraph.js
handleFileRead: /temp.csv
Sent file: /temp.csv
handleFileRead: /favicon.ico
Sent file: /favicon.ico
Temperature requested
Appending temperature to file: 1699253417,21474836.00
File was written
handleFileRead: /temp.csv
File Not Found: /temp.csv
handleFileRead: /temp.csv
File Not Found: /temp.csv

I was able to display the graph for a few moments before it started saying 'file not found'
I am using a Wemos D1 Mini for this project and SPIFFS are set to 4M(1M SPIFFS).
It just seems that it has something to do with the file system but I am lost at that point.

Kind regards
RIchard

[scalesr1]

Additional,
I added a sensor - now I am reading a temp though it is reading as 0.0 - not worried about that at the moment.
If I let the code run it continually adds data to the file.
At the moment I request a read by loading the web page I see this:

Temperature requested
Appending temperature to file: 1699255883,0.00
Temperature requested
Appending temperature to file: 1699255893,0.00
Temperature requested
Appending temperature to file: 1699255903,0.00
Temperature requested
Appending temperature to file: 1699255913,0.00
Temperature requested
Appending temperature to file: 1699255923,0.00
Temperature requested
handleFileRead: /temp.csv

Temperature requested
Appending temperature to file: 1699255883,0.00
Temperature requested
Appending temperature to file: 1699255893,0.00
Temperature requested
Appending temperature to file: 1699255903,0.00
Temperature requested
Appending temperature to file: 1699255913,0.00
Temperature requested
Appending temperature to file: 1699255923,0.00
Temperature requested
handleFileRead: /temp.csv

Panic C:\Users\richard.RCS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2\libraries\ESP8266WiFi\src\include/DataSource.h:93 const uint8_t* BufferedStreamDataSource::get_buffer(size_t) [with TStream = Stream; uint8_t = unsigned char; size_t = unsigned int]: Assertion 'cb == stream_rem' failed.

ctx: cont
sp: 3ffffba0 end: 3fffffd0 offset: 01b0

stack>>>
3ffffd50: 3fff2244 00000015 3fff0c50 40202cc9
3ffffd60: 3fff19cc 00000000 3fff20e4 4020a655
3ffffd70: 3ffef6a8 000004b0 000004b0 00000015
3ffffd80: 00000015 00000000 3fff2224 40213cb9
3ffffd90: 00000015 00000000 00000015 40214cd4
3ffffda0: 00000000 4bc6a7f0 00000015 40211900
3ffffdb0: 00000000 00000000 3fff2224 4020a2de

This is where I need guidance - I can sort the temp reading out no problem.

Kind regards

Richard

[scalesr1]

I am now at the point where the wemos seems stable but the files in the SPIFF's appear to be disappearing - they appear to be being consumed in some way - is that as the data file is being wwritten?
Kind regards
Richard

[scalesr1]

DISREGARD that last comment - a quick reset lists all the files on the serial monitor but a fresh read of the web page causes the PANIC message again ...