Updated Display Modes

This release adds new display modes to the iron. This is under the DISPMD menu

• F - Fast mode, what all the older firmware used
• S - Slow mode, only updates once per second
• R - Rounded mode, only shows temperature to 10C accuracy (rounds off last digits)
• N - None, only shows the heating/cooling symbols. No Temperature display

In the future, the None mode will be tweaked 😄

Fixing menu

Fixes the menu not showing the last item.

Adding shutdown time

• Adds time for unit to shutdown (ie exit sleep)
  Used so that the unit doesn't stay in sleep for extremely long periods of time.

Adding nicer indicators for heating/cooling

This replaces the heating 'H' and 'C' with the nicer arrows from mini ware's firmware to improve the looks.
Might come back later with better icons.

Add dc calibraion

• Small patch adds ability to calibrate input voltage measurement in the Extras menu (Press B button when showing voltage, then press buttons up and down until reads closest to input)

Improved Temp accuracy + New idle screen

• Increase the accuracy of the temperature profile
• Allows temp offset calibration on the misc menu (Press A+B at idle), followed by B
• Much nicer screen on idle with prompts for both buttons (Using Miniware drawing of the iron)

Improved Button Handling + Adjust sensitivity

+Improved button handling
+Set sensitivity of motion (Need feedback if this needs adjustment)
+DC voltage can be read by going to thermometer page (press both buttons in IDLE), then press either button to swap to DC Input.

V1.02 - Thermometer mode & Double button exit & Screen fix

This update adds a thermometer mode, which shows the measured temperature at the tip of the iron.
It also changes the soldering mode exit from the B button, to holding both buttons together (Like original firmware).

This also fixes the screen in left-handed mode (flipped display). This should clear the issue with the line of crap on the screen.

V1.01 - Left Handed and Fahrenheit

Added options to flip the screen for Left Handed users.
Added option to display in Fahrenheit instead of Celsius.
Shrunk text spacing slightly to allow for better text in menus.

Version 1.0 First complete release

Added most of the missing features.
Tested on two units.