ESP8266 Community Forum

- Sat Apr 13, 2019 12:01 pm #81752 I am trying to send udp packets from a Wemos D1 Mini (ESP8266, platformio with arduino framework) to a Windows machine, where I have to update a 3D object. The Wemos is opening a soft access point which I connect to with my PC.

I am achieving ~ one packet every 10ms (given that I have to read the data from a sensor), however there is a noticeably delay (of ~ 200ms) every 100ms (wireshark screenshot).


I've tested it with using serial packets instead of udp where I have absolutely no problems whatsoever (one packet every 10ms, captured with hterm).
My only guess is that there is some recurrent service in relation with the soft access point, but I have no clue how to fix it. Any help?

My code using <WiFiUdp.h> and <ESP8266WiFi.h>:

Open soft access point (in setup):

Code: Select allWiFi.softAP("martin_router_king", "i_have_a_stream");

Send data (called by loop, where udp_ is of type WiFiUDP and length is 3):

Code: Select allbool Sender::sendData(float *data, uint16_t length)
{
    // Send data using udp
    udp_.beginPacket(receiver_, port_);
    for (uint16_t i = 0; i < length; ++i) {
        udp_.print(':');
        udp_.print(data[i]);
    }
    return udp_.endPacket();
}

Cheers, chrizbee