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Description
Board
ESP32, ESP32-S2
Device Description
Issue reproduced on both YUBOX Node (ESP32) and YUBOX One (ESP32-S2)
Hardware Configuration
ESP32 board has inbuilt I2C sensors, otherwise plain
ESP32-S2 board has buzzer and I2C sensors on different pins
Version
v2.0.2
IDE Name
Arduino IDE 1.8.19
Operating System
Android 8.x, Android 9
Flash frequency
80 MHz
PSRAM enabled
no
Upload speed
115200
Description
I downloaded an Android App to perform MDNS discovery of various ESP32 and ESP32-S2 devices connected to a local network. The Android App is Service Browser by Andriy Druk. This is the link to the Google Play Store.
My YUBOX Framework projects enable MDNS and expose _http._tcp as a MDNS service in order to be discoverable. With other OS such as Fedora Linux and Windows, all runs OK. However, when using the app, and choosing the _http._tcp section, then the specific ESP32 name exposed by the device, the device itself crashes and reboots.
The below sketch also reproduces this bug. It is a straightforward copy of the MDNS HTTP server example provided by Arduino-ESP32, except with my WiFi credentials, and the MDNS name changed to esp32-crashme.
The expected behavior is, obviously, no crash.
Sketch
#include <Arduino.h>
#include <WiFi.h>
#include <ESPmDNS.h>
static const char * ssid = ".....";
static const char * password = ".....";
// TCP server at port 80 will respond to HTTP requests
WiFiServer server(80);
void setup()
{
Serial.begin(115200);
// Connect to WiFi network
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
// Set up mDNS responder:
// - first argument is the domain name, in this example
// the fully-qualified domain name is "esp32.local"
// - second argument is the IP address to advertise
// we send our IP address on the WiFi network
if (!MDNS.begin("esp32-crashme")) {
Serial.println("Error setting up MDNS responder!");
while(1) {
delay(1000);
}
}
Serial.println("mDNS responder started");
// Start TCP (HTTP) server
server.begin();
Serial.println("TCP server started");
// Add service to MDNS-SD
MDNS.addService("http", "tcp", 80);
}
void loop()
{
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
Serial.println("");
Serial.println("New client");
// Wait for data from client to become available
while(client.connected() && !client.available()){
delay(1);
}
// Read the first line of HTTP request
String req = client.readStringUntil('\r');
// First line of HTTP request looks like "GET /path HTTP/1.1"
// Retrieve the "/path" part by finding the spaces
int addr_start = req.indexOf(' ');
int addr_end = req.indexOf(' ', addr_start + 1);
if (addr_start == -1 || addr_end == -1) {
Serial.print("Invalid request: ");
Serial.println(req);
return;
}
req = req.substring(addr_start + 1, addr_end);
Serial.print("Request: ");
Serial.println(req);
String s;
if (req == "/")
{
IPAddress ip = WiFi.localIP();
String ipStr = String(ip[0]) + '.' + String(ip[1]) + '.' + String(ip[2]) + '.' + String(ip[3]);
s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>Hello from ESP32 at ";
s += ipStr;
s += "</html>\r\n\r\n";
Serial.println("Sending 200");
}
else
{
s = "HTTP/1.1 404 Not Found\r\n\r\n";
Serial.println("Sending 404");
}
client.print(s);
client.stop();
Serial.println("Done with client");
}Debug Message
rst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1324
ho 0 tail 12 room 4
load:0x40078000,len:13508
load:0x40080400,len:3604
entry 0x400805f0
[ 1][V][WiFiServer.h:42] WiFiServer(): WiFiS�␘����:WiFiServer(port=80, ...)
[ 2][D][esp32-hal-cpu.c:211] setCpuFrequencyMhz(): PLL: 480 / 2 = 240 Mhz, APB: 80000000 Hz
[ 60][D][WiFiGeneric.cpp:831] _eventCallback(): Arduino Event: 0 - WIFI_READY
[ 148][V][WiFiGeneric.cpp:272] _arduino_event_cb(): STA Started
[ 149][V][WiFiGeneric.cpp:96] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
[ 150][D][WiFiGeneric.cpp:831] _eventCallback(): Arduino Event: 2 - STA_START
....[ 2425][V][WiFiGeneric.cpp:284] _arduino_event_cb(): STA Connected: SSID: PSW-DEVICES, BSSID: 46:d9:e7:b7:1a:c2, Channel: 1, Auth: WPA2_PSK
[ 2426][D][WiFiGeneric.cpp:831] _eventCallback(): Arduino Event: 4 - STA_CONNECTED
[ 2554][V][WiFiGeneric.cpp:294] _arduino_event_cb(): STA Got New IP:172.16.238.40
[ 2554][D][WiFiGeneric.cpp:831] _eventCallback(): Arduino Event: 7 - STA_GOT_IP
[ 2557][D][WiFiGeneric.cpp:880] _eventCallback(): STA IP: 172.16.238.40, MASK: 255.255.240.0, GW: 172.16.224.1
.
Connected to PSW-DEVICES
IP address: 172.16.238.40
mDNS responder started
TCP server started
Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled.
Core 0 register dump:
PC : 0x4008941f PS : 0x00060630 A0 : 0x800fb8d7 A1 : 0x3ffcc020
A2 : 0x3ffcac90 A3 : 0x00000000 A4 : 0x00000018 A5 : 0x3ffcc3a8
A6 : 0x00000000 A7 : 0x00000000 A8 : 0x0000005f A9 : 0x00000000
A10 : 0x00000000 A11 : 0x3ffc4bb2 A12 : 0x3ff96355 A13 : 0x3ffc4b36
A14 : 0x0000006c A15 : 0x00000000 SAR : 0x00000004 EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000000 LBEG : 0x40089078 LEND : 0x4008908e LCOUNT : 0x00000000
Backtrace:0x4008941c:0x3ffcc0200x400fb8d4:0x3ffcc040 0x400ff6c1:0x3ffcc070 0x40100361:0x3ffcc140
----------
PC: 0x4008941f: strcasecmp at /builds/idf/crosstool-NG/.build/xtensa-esp32-elf/src/newlib/newlib/libc/string/strcasecmp.c line 46
EXCVADDR: 0x00000000
Decoding stack results
0x4008941c: strcasecmp at /builds/idf/crosstool-NG/.build/xtensa-esp32-elf/src/newlib/newlib/libc/string/strcasecmp.c line 46
0x400fb8d4: _mdns_get_service_item_instance at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/mdns/mdns.c line 265
0x400ff6c1: mdns_parse_packet at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/mdns/mdns.c line 1461
0x40100361: _mdns_service_task at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/mdns/mdns.c line 4460
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide
- I confirm I have checked existing issues, online documentation and Troubleshooting guide.
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