Max size limit for HttpResponse* post_res = post_req->send(body, size)

Brijesh over 6 years ago

I am using #include "https_request.h" in my code and created request to upload image passing body and size of image.

HttpResponse* post_res = post_req->send(body, imgSize);

But My image size is->

char body[640*480];
unsigned long imgSize;

I have uploaded image successfully to dropbox but it is blank. I think it is not uploading full size of data.

Is it because of limit of size in post_req->send(body, size)?

I have gone through (https_request.h) where I found size if passed to nsapi_size_t.

and this typedef unsigned int nsapi_size_t.

0 JB (SWF) over 6 years ago

Hi Brijesh,

Any updates on this issue? Have you found out the reason why the uploaded image is blank?

JB
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0 jihas over 6 years ago

Are you uploading image on esp32's normal mode?
In normal mode you can only upload 2Kb data as single packet. The esp 32 has another mode of operation ie; wifi pass through mode, by ente ring this mode you can upload large files.I have already tested uploading 640x480 images.
If the mode is the problem please let me know, i can help you.
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0 jihas over 6 years ago

renesasrulz.com/.../streaming-video-to-a-website-that-is-accessible-through-internet

Check this link, the last comment may help you.
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0 Brijesh over 6 years ago in reply to JB (SWF)

still not, but I have checked the size of the image which is uploaded. It is in Kb, so which gives hint that there is a problem in the upload of full image size.
Might be one of reason as mentioned by @jihas
I will try and let you know.
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0 Brijesh over 6 years ago in reply to jihas

@jihas Could you please tell me how to change the mode of esp32.

and for sending data even I directly added memory size still no success
HttpResponse* post_res = post_req->send(body, 19200); //160*120 = 19200
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0 jihas over 6 years ago in reply to Brijesh

Note: No libraries used ,only AT commands

you can change the mode to wifi passthrough mode by "AT+CIPMODE=1"
Then connect to your server by
AT+CIPSTART="TCP","example.com",80
Once connected to the server it will maintain the connection until you exit the wifipass through mode
when you entered in to this mode and established a server connection, you won't be able to send any at commands until you exit the mode
To exit from this mode you need to send the escape sequence ie;three plus symbols (+++) there must be a delay of 1 second before and after the sequence

If you want to send a POST request then send "AT+CIPSEND" without the size parameter

then you will recieve ">" symbol from esp

then send your request

This is a sample request to send a photo,

POST /projects/2018/exmple.php? HTTP/1.1\r\nHost: example.com\r\nContent-Length: <size of the data+2>\r\nContent-Type: application/x-www-form-urlencoded\r\n\r\ndata=<data>\r\n

replace this with actual size-> <size of the data+2>
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