Peter M. Groen / EasyOpenTherm

…the EasyOpenTherm shield

…SP8266 support, changed shortID() to pick the least significant bytes of chip ID, made StaticJsonDocument DynamicJsonDocument, small ISR related changes in OTPhysicalLayer

…s() - interrups() sequences

…, including explanation of flags, using the correct data type and showing the unit (if any) for boilers and HVACs