I still continue to optimize sw for best performance and stability. Web informations are more simple. I get out garbage parameters used for system development. I would like to use wireless temperature ESP8266 sensors to publish it on the web as well as wether informations or some home automation usefull thinks. Important question is how to predict refueling needed as alarm. Low boiler temperature is too late signal. Maybe chimney ventilation regulation make me happy :-)

Picture contains simple web and serial output from Raspberry with restart.