I have these ESP32S3 boards and use the WifiClient.Write method to send the FrameBuffer of a captured Image to a Server endpoint via HTTP-Post.
Everything works well except the Wifi performance of the ESPs is really really bad.
(I use modified Arduino IDE examples as the base)
Sending 40Kb Jpg takes between 500ms to 15 seconds to send. These are only the timings for sending the FrameBuffer.
Anyone a link/tip to a good working example in preferably Arduino IDE?
@algaeman I will look into the HttpClient.
But the WifiClient.write method already takes a buffer. I tested it with different chunk sizes but that made no difference.
Didn't make my own wheel took this from some of the examples in the Arduino IDE.
@algaeman rewritten it to use the HTTPClient. Looks a bit cleaner but the results are the same.
Sending takes between 500ms and 15 seconds. Same room as the wifi ap and stationary on a good powersupply.
Have been searching for the last 2-3 hours. Seems to be a known problem with no real solution.
Next step try to get ESP-IDF installed and try from there.
@algaeman It is from the framebuffer directly to the httpclient.
From all the times I am tracking the sending part is inconsistent (500ms to 15sec).
Camera, Building the request, Receiving the Response all fairly consistent.
Sending the post request is what is having that strong variation.
I also tested the endpoint to make sure that is not the bottleneck.
I am nearly don installing the ESP-IDE. They have some iperf examples. Let's see if that makes the difference.
@algaeman ok getting somewhere. In the ESP-IDE there is a iperf template. That implements iperf on the ESP. You can run it server or client on both sides.
I get roughly 40-45 Mbits/sec in both directions.
So the problem must be in the implementaton or the definitions in Arduino IDE based version.
Will use an ESP-IDE template and start from there.
Whatisgoingon
Algaeman