boolean ELClientMqtt::lwt(const __FlashStringHelper* topic, const __FlashStringHelper* message) { return lwt(topic, message, 0, 0); }
boolean MQTT::lwt(const char* topic, const char* message) { return lwt(topic, message, 0, 0); }
boolean ELClientMqtt::lwt(const char* topic, const char* message) { return lwt(topic, message, 0, 0); }