tm.temperature scroll for negative and > 99 values

[thijstriemstra]

A DS18B20 measures temperatures from -55°C to +125°C. With tm.temperature(101) as well as tm.temperature(-10) it shows garbled text. Is it possible to simply scroll for values over > 99 or < -9? Also see https://github.com/mcauser/micropython-tm1637/blob/master/tm1637_test.py#L209

I can create a PR if you like the idea.

[thijstriemstra]

[mcauser]

I added the temperature() method which shows a "degrees C" on the last 2 segments.
This means it's possible range is -9 to +99.

To show something when outside this range, I added "HI" for High and "LO" for Low.
eg.

tm.temperature(-10) # LO*C
tm.temperature(-9)  # -9*C
tm.temperature(5)   #  5*C
tm.temperature(24)  # 24*C
tm.temperature(99)  # 99*C
tm.temperature(100) # HI*C

Another way of writing tm.temperature(24) is tm.show('24*C').

To support a wider range of temperatures / numbers, you could stringify your number and call scroll() instead of show(), with '*C' as the last 2 characters in your string if you want to represent it as a temperature. The star '*' symbol is displayed as a degrees symbol, the top 4 LED segments.

[thijstriemstra]

Ah I see, it says LO/HI! Sorry for calling it garbled text ;) YOLO. I will try to come up with a scrolling version, at least for my own project, and let you know how it goes.

[mcauser]

Sounds like this is what you're after:

def ds18b20(self, temp, delay=250):
	self.scroll('{:.0f}*C'.format(temp), delay)

[thijstriemstra]

@mcauser that's beautiful! having that as the default behaviour for temperature for those 'edge cases' would be a nice enhancement.