fix dhcp problems on reconnect

platformio.ini

@@ -16,6 +16,7 @@ board = nodemcu
 framework = arduino
 board_build.f_cpu = 80000000L
 board_build.f_flash = 40000000L
+board_build.flash_mode = dio
 monitor_speed = 115200
 
 build_flags =
@@ -25,6 +26,7 @@ build_flags =
 ;    -DDEBUG_ESP_SSL
 ;    -DDEBUG_ESP_TLS_MEM
 ;    -DDEBUG_ESP_HTTP_CLIENT
+;    -DDEBUG_ESP_WIFI
 ;    -D PIO_FRAMEWORK_ARDUINO_LWIP_HIGHER_BANDWIDTH
 
 lib_deps =

src/main.cpp

@@ -37,7 +37,7 @@ const char* mqttusername PROGMEM = "esp-weatherstation";
 const char* mqttpassword PROGMEM = PWD_MQTT;
 
 constexpr unsigned int postingInterval = 60000; //Uploadintervall in Millisekunden
-constexpr unsigned int dhcp_interval = 60*60*1000;
+constexpr unsigned int dhcp_interval = 3*60*1000;
 
 uint32_t loop_count = 0;
 
@@ -301,6 +301,7 @@ void ICACHE_FLASH_ATTR sendValues() {
 
   } else {
     DEBUG_MSG("dhcp\n");
+    WiFi.disconnect();
     int tries = 0;
     constexpr unsigned int retry_delay = 500;
     constexpr unsigned int max_retry_delay = 12000;
@@ -362,23 +363,12 @@ void ICACHE_FLASH_ATTR sendValues() {
   net.setInsecure();
   mqttclient.begin(mqttserver, 8883, net);
   int tries = 0;
-  bool mqtt_error = false;
   constexpr unsigned int retry_delay = 500;
-  constexpr unsigned int max_retry_delay = 5000;
-  while (!mqttclient.connect(mqttusername, mqttusername, mqttpassword)) {
-    tries++;
+  for (int tries=0; tries<5 && !mqttclient.connect(mqttusername, mqttusername, mqttpassword); tries++ ) {
     DEBUG_MSG(".");
-    if (tries*retry_delay >= max_retry_delay) {
-      DEBUG_MSG(" [ERROR]\n");
-      //DEBUG_MSG("Rebooting..\n");
-      //ESP.restart();
-      mqtt_error = true;
-    }
     delay(retry_delay);
   }
 
-  if (!mqtt_error) {
-
     mqttclient.loop();
     getValuesJSON(buffer, MQTT_MAX_PACKET_SIZE, 2);
     if (mqttclient.publish("sensor/esp-weatherstation/01/json", buffer, strlen(buffer))) {
@@ -389,8 +379,6 @@ void ICACHE_FLASH_ATTR sendValues() {
     mqttclient.loop();
     mqttclient.disconnect();
 
-  }
-
   if (sd.rssi == 0) {  // re-read rssi if zero
     sd.rssi = WiFi.RSSI();
   }
@@ -404,7 +392,7 @@ void ICACHE_FLASH_ATTR sendValues() {
   loop_count++;
 
   net.stop();
-  WiFi.disconnect();
+  WiFi.disconnect(true);
   WiFi.mode(WIFI_OFF);
   WiFi.forceSleepBegin();
   delay(1); // yield();

src/main.h

@@ -7,6 +7,6 @@
   #define DEBUG_MSG(...)
 #endif
 
-#define FW_VERSION 34
+#define FW_VERSION 35
 
 #endif /* _MAIN_H */