UDP not receiving data after sometimes #7007
Description
Basic Infos
- This issue complies with the issue POLICY doc.
- I have read the documentation at readthedocs and the issue is not addressed there.
- I have tested that the issue is present in current master branch (aka latest git).
- I have searched the issue tracker for a similar issue.
- If there is a stack dump, I have decoded it.
- I have filled out all fields below.
Platform
- Hardware: [ESP-12]
- Core Version: [latest git hash]
- Development Env: [Arduino IDE]
- Operating System: [Windows]
Settings in IDE
- Module: [Wemos D1 mini r2]
- Flash Mode: [qio]
- Flash Size: [4MB]
- lwip Variant: [v2 Lower Memory]
- Reset Method: [ck]
- Flash Frequency: [40Mhz]
- CPU Frequency: [80Mhz]
- Upload Using: [SERIAL]
- Upload Speed: [115200]
Problem Description
I have problem with WiFi UDP program with UDP Example. In the beginning Wemos is receiving UDP data. But after some minutes ( > 5 minutes ), Wemos is not receiving UDP data.
Any solution?
Thank You.
Code
#include <ESP8266WiFi.h> #include <WiFiUdp.h> const char* ssid = "********"; const char* password = "********"; WiFiUDP Udp; unsigned int localUdpPort = 4210; // local port to listen on char incomingPacket[255]; // buffer for incoming packets char replyPacket[] = "Hi there! Got the message :-)"; // a reply string to send back void setup() { Serial.begin(115200); Serial.println(); Serial.printf("Connecting to %s ", ssid); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(" connected"); Udp.begin(localUdpPort); Serial.printf("Now listening at IP %s, UDP port %d\n", WiFi.localIP().toString().c_str(), localUdpPort); } void loop() { int packetSize = Udp.parsePacket(); if (packetSize) { // receive incoming UDP packets Serial.printf("Received %d bytes from %s, port %d\n", packetSize, Udp.remoteIP().toString().c_str(), Udp.remotePort()); int len = Udp.read(incomingPacket, 255); if (len > 0) { incomingPacket[len] = 0; } Serial.printf("UDP packet contents: %s\n", incomingPacket); // send back a reply, to the IP address and port we got the packet from Udp.beginPacket(Udp.remoteIP(), Udp.remotePort()); Udp.write(replyPacket); Udp.endPacket(); } }