Version 2.7 firmware for ESTechnical Reflow Oven Controller

• Improved LCD display, by using lcd.clear sparingly the display now does not flicker
• MAX31855 library by ESTechnical used to measure temperature and provide a smooth rolling average
• Lots of improvements in the code, cleanup etc.

Version 2.6 firmware for ESTechnical Reflow Oven Controller

• Allows use of the controller when B thermocouple input is open circuit, new ESTechnical T962A reflow ovens ship with a socket for a board thermocouple - using this thermocouple is optional. See http://www.estechnical.co.uk/forum/reflow-soldering/313-datalogging-with-the-estechnical-reflow-controller for more info.
• Improved thermocouple reading code, refactored to allow storage of status of the input.
• Faster SPI read rate
• Fixed a loss of precision in reading thermocouple data

v2.5

General bug-fix release - many minor improvements.

v2.3

Lots of minor improvements:

• Cools to 50°C instead of 20°C at end of cycle (as requested)
• Updated display layout shows more information in a more meaningful manner
• Fixed a small bug relating to EEPROM memory