Arduino Nano ESP32-S3无规律死机问题求助

我是编程新手，首次发帖求助。目前遇到的问题：用Arduino Uno R4编写代码，每分钟向4台Arduino Nano ESP32-S3发送内容为Temp?的UDP数据包，Nano需返回温湿度传感器采集数据的UDP响应。但代码运行约13分钟后，Nano会出现死机情况。

我观察到死机常发生在UDP请求的间隔期间，推测问题并非出在UDP数据包处理环节。已完成以下排查：

• 内存泄漏：每次UDP请求时打印可用栈和堆内存，未发现明显变化；
• 网络问题：通过路由器确认UDP请求仍在正常发送，串口输出未冻结；
• 硬件故障：更换其他Nano后，相同问题依旧出现。

现在陷入瓶颈，恳请各位技术人士提供帮助。附运行代码如下：

#include <DHT11.h>
#include <SPI.h>
#include <WiFi.h>
#include <WiFiUdp.h>

int CNT = 0;
int ID = 2;
DHT11 dht11(2);
char SSID[] = "IOT";
char pass[] = "SSN690am!";
unsigned int localPort = 2390; 
char packetBuffer[255];
char qryTemp[] = "Temp?";
WiFiUDP Udp;

void setup() {
    // Initialize serial communication to allow debugging and data readout.
    // Using a baud rate of 9600 bps.
    Serial.begin(9600);
    // Connect to WPA/WPA2 network:
    WiFi.begin(SSID, pass);
    Udp.begin(localPort);
}

void loop() {
    int temp = 0;
    int humidity = 0;
    int result = dht11.readTemperatureHumidity(temp, humidity);
    
    int packetSize = Udp.parsePacket();
    Serial.print(packetSize);

    if (packetSize) {
        Serial.printf("\nStack:%d,Heap:%lu\n", uxTaskGetStackHighWaterMark(NULL), (unsigned long)ESP.getFreeHeap());

        Serial.print("MSG COUNT:");
        Serial.println(CNT);
        CNT++;

        Serial.print("Received packet of size ");
        Serial.println(packetSize);
        Serial.print("From ");
        Serial.print(Udp.remoteIP());
        Serial.print(", port ");
        Serial.println(Udp.remotePort());

        // read the packet into packetBufffer
        int len = Udp.read(packetBuffer, 255);
        if (len > 0) {
            packetBuffer[len] = 0;
        }

        Serial.println("Contents:");
        Serial.println(packetBuffer);

        if(int(packetBuffer[0]) == 84 and int(packetBuffer[1]) == 101 and int(packetBuffer[2]) == 109 and int(packetBuffer[3]) == 112 and int(packetBuffer[4]) == 63){
            // send a reply, to the IP address and port that sent us the packet we received
            Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());

            Udp.write(char(ID));
            Udp.write(char(temp));
            Udp.write(char(humidity));

            Udp.endPacket();
            Udp.flush();
        }
    }
}

内容的提问来源于stack exchange，提问作者Andrew Dorchak