From 29d5ea430c0016b283f9064f9999d8f8898d17c8 Mon Sep 17 00:00:00 2001
From: Ioann Volkov <volkov.ioann@gmail.com>
Date: Sat, 11 Sep 2021 01:45:23 +0300
Subject: [PATCH] ESP: Using crutch from
 https://github.com/esp8266/Arduino/issues/6886 (sending ARP broadcasts every
 second)

---
 ESP8266_Firmware/src/main.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ESP8266_Firmware/src/main.cpp b/ESP8266_Firmware/src/main.cpp
index 2b52f11..fb5c515 100644
--- a/ESP8266_Firmware/src/main.cpp
+++ b/ESP8266_Firmware/src/main.cpp
@@ -1,4 +1,5 @@
 #include <ESP8266WiFi.h>
+#include <ESP8266WiFiGratuitous.h>
 #include <ESP8266WebServer.h>
 #include <WiFiUdp.h>
 #include <lwip/igmp.h>
@@ -255,6 +256,9 @@ bool connectToWiFi(const char* ssid, const char* passphrase, bool connectInfinit
   Serial.printf("Connected, IP: %s\n", ip.toString().c_str());
   digitalWrite(LED_BUILTIN, HIGH);
 
+  // This should partly help for quick responses, details: https://github.com/esp8266/Arduino/issues/6886
+  experimental::ESP8266WiFiGratuitous::stationKeepAliveSetIntervalMs();
+
   const bool listeningMulticast = udp.beginMulticast(ip, UDP_MULTICAST_IP, UDP_MULTICAST_PORT);
   if (listeningMulticast) {
     Serial.printf("Started listening UDP multicast on %s:%d\n", UDP_MULTICAST_IP.toString().c_str(), UDP_MULTICAST_PORT);
@@ -541,7 +545,7 @@ void setup() {
   WiFi.softAPdisconnect(true);
   isAccessPointEnabled = false;
 
-  // This should help for quick responses, details: https://github.com/esp8266/Arduino/issues/6886
+  // This should partly help for quick responses, details: https://github.com/esp8266/Arduino/issues/6886
   if (!WiFi.setSleepMode(WIFI_NONE_SLEEP)) {
     Serial.println("Failed to set wi-fi sleep mode to None!");
   }