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Add more redundancy to lost MQTT server

This commit is contained in:
Theo Arends 2022-06-13 11:45:09 +02:00
parent 93bb0d23b8
commit 8ba2733cf7
2 changed files with 21 additions and 6 deletions
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21
tasmota/tasmota_support/support_wifi.ino
View File

@ -732,7 +732,8 @@ void wifiKeepAlive(void) {
bool WifiPollDns(void) {
// WiFi.hostByName takes over ten seconds if no DNS server found
// This function checks to find the DNS server within 1 second
// This is an alternative for ping using less resources
// This is an alternative for ping using less resources and some DNS server do not respond to pings (ICMP)
// See https://github.com/letscontrolit/ESPEasy/issues/1494#issuecomment-397872538
WiFiClient DnsClient;
#ifdef ESP8266
@ -747,12 +748,25 @@ bool WifiPollDns(void) {
DnsClient.stop();
return true;
}
// AddLog(LOG_LEVEL_DEBUG, PSTR("DNS: Disconnected %_I"), dns_address);
AddLog(LOG_LEVEL_DEBUG, PSTR("DNS: Disconnected"));
// }
AddLog(LOG_LEVEL_DEBUG, PSTR("DNS: Disconnected"));
return false;
}
int WifiHostByName(const char* aHostname, IPAddress& aResult) {
// Use this instead of WiFi.hostByName or connect(host_name,.. to block less if DNS server is not found
aResult = (uint32_t)(0);
if (aResult.fromString(aHostname)) {
// Host name is already an IP address so use it!
return 1;
}
else if (WifiPollDns() && WiFi.hostByName(aHostname, aResult)) {
// Host name resolved
return 1;
}
return 0;
}
void WifiPollNtp() {
static uint8_t ntp_sync_minute = 0;
static uint32_t ntp_run_time = 0;
@ -809,6 +823,7 @@ uint32_t WifiGetNtp(void) {
}
if (strlen(ntp_server)) {
resolved_ip = (WiFi.hostByName(ntp_server, time_server_ip) == 1); // DNS timeout set to (ESP8266) 10s / (ESP32) 14s
// resolved_ip = (WifiHostByName(ntp_server, time_server_ip) == 1); // DNS timeout set to (ESP8266) 10s / (ESP32) 14s
if ((255 == time_server_ip[0]) || // No valid name resolved (255.255.255.255)
((255 == time_server_ip[1]) && (255 == time_server_ip[2]) && (255 == time_server_ip[3]))) { // No valid name resolved (x.255.255.255)
resolved_ip = false;

6
tasmota/tasmota_xdrv_driver/xdrv_02_9_mqtt.ino
View File

@ -1083,12 +1083,12 @@ void MqttReconnect(void) {
}
}
#endif
if (!WifiPollDns()) {
IPAddress mqtt_host_ip;
if (!WifiHostByName(SettingsText(SET_MQTT_HOST), mqtt_host_ip)) {
MqttDisconnected(-5); // MQTT_DNS_DISCONNECTED
return;
}
MqttClient.setServer(SettingsText(SET_MQTT_HOST), Settings->mqtt_port);
MqttClient.setServer(mqtt_host_ip, Settings->mqtt_port);
uint32_t mqtt_connect_time = millis();
#if defined(USE_MQTT_TLS)