Home Original page

HeapSelectDram for pvPortMalloc, ... by mhightower83 · Pull Request #7790 · esp8266/Arduino

@d-a-v Thanks!

I tested with liblwip2-1460-feat.a and liblwip2-1460.a. Both worked with this bad example, using a HeapSelectIram across all of setup(). WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0)) was the call at this level that would lead to a HWDT.

#include <ESP8266WiFi.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <umm_malloc/umm_heap_select.h>

const byte DNS_PORT = 53;
IPAddress apIP(172, 217, 28, 1);
DNSServer dnsServer;
ESP8266WebServer webServer(80);

String responseHTML = ""
                      "<!DOCTYPE html><html lang='en'><head>"
                      "<meta name='viewport' content='width=device-width'>"
                      "<title>CaptivePortal</title></head><body>"
                      "<h1>Hello World!</h1><p>This is a captive portal example."
                      " All requests will be redirected here.</p></body></html>";

void setup() {
  HeapSelectIram x;

  WiFi.persistent(false);
  WiFi.mode(WIFI_OFF);
  Serial.begin(115200);
  delay(15);
  Serial.println();
  Serial.println();

  WiFi.mode(WIFI_AP);
  // { // This is the WiFi call that leads to HWDT
  //   HeapSelectIram x;
    WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));
  // }
  WiFi.softAP("DNSServer CaptivePortal example");

  // if DNSServer is started with "*" for domain name, it will reply with
  // provided IP to all DNS request
  dnsServer.start(DNS_PORT, "*", apIP);

  Serial.println("DNSServer CaptivePortal example running");

  // replay to all requests with same HTML
  webServer.onNotFound([]() {
    webServer.send(200, "text/html", responseHTML);
  });
  webServer.begin();
}

void loop() {
  HeapSelectIram x;
  dnsServer.processNextRequest();
  webServer.handleClient();
}