From e273e5714eed3335e54dfd1b8b25bcd3d91a11c2 Mon Sep 17 00:00:00 2001
From: Denis Denisov <ftc.denis@gmail.com>
Date: Thu, 8 Sep 2022 23:38:41 +0300
Subject: [PATCH] Trying to reconnect when there's no network connection.
 Reboots if connection is not established for a while

---
 thermo_sensor_v2.ino | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/thermo_sensor_v2.ino b/thermo_sensor_v2.ino
index b3df161..60ad6ce 100644
--- a/thermo_sensor_v2.ino
+++ b/thermo_sensor_v2.ino
@@ -3,6 +3,10 @@
 #include <ModbusIP_ESP8266.h>
 #include "config.h"
 
+// After how much time without connection we will 
+// reboot (in millis)
+#define NON_CONNECTED_REBOOT_TIMEOUT 60000 
+
 #define DHTPIN 5
 #define DHTTYPE DHT22
 #define READ_INTERVAL 100
@@ -66,6 +70,7 @@ void UpdateDHTData()
 }
 
 unsigned long last_read = 0;
+unsigned long last_connected = 0;
 
 void loop() 
 {
@@ -78,4 +83,16 @@ void loop()
 	mb.task();
 	mb.Hreg(REGISTER_CURRENT_TEMP, cur_t);
 	mb.Hreg(REGISTER_CURRENT_HUM, cur_hum);
+	if (WiFi.status() != WL_CONNECTED)
+	{
+		WiFi.reconnect();
+	}
+	else
+	{
+		last_connected = current;
+	}
+	if (current < last_connected || current - last_connected > NON_CONNECTED_REBOOT_TIMEOUT)
+	{
+		ESP.restart();
+	}
 }