Switch back to calling dtostrf for float to string (snprintf doesn't work by design on ESP8266).
Switch back to calling dtostrf for float to string (snprintf doesn't work by design on ESP8266).

georgeartem/Arduino_MQTT,AdySan/Adafruit_MQTT_Library,matthijskooijman/Adafruit_MQTT_Library,spark/Adafruit_MQTT_Library,adafruit/Adafruit_MQTT_Library,Marzogh/Adafruit_MQTT_Library,milk-cocoa/Adafruit_MQTT_Library