ESP8266 Developer Zone

Hello,
I am using ESP8266EX :


I want to use flow control to receive as fast as possible without data loss. I am using CTS pin to stop receiving when the program behind the ESP8266 can´t handle data. On this way when I want more data I enable CTS.

In order to do that I am using next AT commands in the ESP8266:


It is connecting to a NetCat to receive as much data as possible.


In my program that is connected to the ESP using AT commands and serial port I see data until 25Kb are sent, more or less. After that the ESP-8266 lose the wifi connection. I think the Esp8266 is reset by some issue.



What am I missing? Is it possible to do in a different way?

Kind regards.

Hi,

Sorry that we cannot duplicate your problem, could you provide UART1 log for debugging?

Thanks for your interest in ESP8266!

Hello:

What I see is the file I attached. Is there some way to put the esp in debug mode?

I am using a ESP-01 using a serial-usb converter.

Please, could you let me know how you are testing the esp?.

Kind regards.

“CLOSE” means that the TCP connection is closed, maybe closed by your TCP server. You can capture the TCP packets by wireshark or omnipeek to find out it.

Hello,

Thank you very much for your answer. Indeed you are true. The problem here was that the timeout in the server was really low so the Esp didn´t process the packages fast enough for ther server. Increasing timeout fixed the problem.

However it was for 64Kb file. I wanted to transmit big files so I moved to 560Kb file size. I have increased server timeout



What I see here, please correct me if I am wrong, is that the ESP tells that the server mustn´t send more packages "Len=0", after that server requests for retransmision. And what has changed is the fact that the ESP is requesting for reset in the last package.



The Esp serial port output is:


Why is the WIFI DISCONNECT ?

Kind regards and thank you for your help.

The captured packet is kind of strange, did you miss some packets?
[TCP window full] means that you send data too fast that the ESP cannot receive,
but there should be [TCP zerowindow] to tell the server to slow down.
The last [RST, ACK] is the ESP to close the TCP connection.
And the WiFi should not disconnect, is it the network condition too bad so the connection break? Maybe you can try it again with another router.

Hello:

Thank you very much for your answer. I did miss some packages. I have just copied just what I thought were interesting.

The connection network is right, I tried with an SMC Barricade router. I think this is the main problem. After that I tried with a different router brand and is working properly.

Please, consider this topic as closed. It is woking properly for me.

Kind regards and thank you for your help.