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Basic Infos
- This issue complies with theissue POLICY doc.
- I have read the documentation atreadthedocs 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 onchar incomingPacket[255]; // buffer for incoming packetschar replyPacket[] = "Hi there! Got the message :-)"; // a reply string to send backvoid 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(); }}