Diff: README.md

Revision:

10:df37742f32d6

Parent:

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--- a/README.md	Sun Aug 14 10:31:41 2016 +0000
+++ b/README.md	Sun Aug 14 11:45:28 2016 +0000
@@ -1,12 +1,43 @@
-# microbit-starter
+##MicroBit-rtc_ds3231
+##Clock
+
+Copyright  David Wright 2016. DAW9000.
+Feel free to copy, ammend , or do what you will but a shout out would be nice :)
 
-An example programs using the micro:bit runtime.
+
+This program uses the Maxim Integrated DS3231 library to create a BBC MicroBit
+Clock. Requires a DS3231 Real Time clock connected to pin 19 and 20.
+
+Recommended that an edge connector is used for DS3231 connection.
 
-Using microbit.
-This program shows the Temperature which can be adjusted up or down to reflect true ambient temperature using B (down) and A (up).
-Pressing A+B together changes mode from temperature to compass text heading display to compass heading graphic. Pressing A+B will circle around the three
-modes.
-Touching pins GND and P0 dims display, GND and P1 brightens display. GND and P2 shows actual device temperature.
+Program will display :-
+    Date then Time then Temp (from DS3231 not MicroBit as it seems for
+    accurate as to ambient temp.)
+    Pressing Button B and keeping it pressed between rotations ie at the end
+    of each display cycle will change mode cyclically.
+    1. Date, Time, Temp
+    2. Date only.
+    3. Time only.
+    4. Temp only.
+I am sure better things can be done here! Improvements welcome.
+
+Pressing Buttons A and B together and keeping pressed as above will take
+you into clock setting mode.
+Clock is set :-
+Year, Month, Day, Hour, Minute, Second, Day of Week (1 to 7 eg Sun=7 but you can
+make any day the start of week ie Sun=1).
+Setting is done after DATE and again after TIME. So if only setting date
+you can abort after the msg "Date Set".
+
+If in setting mode abort changes by powering off at any time.
+
+This again can be improved .... not the easiest to set date and time with
+no keypad and limited screen!
+
+DS3231 has 2 alarms, so alarm clock feature with speaker/music attached to
+MicroBit is a good future mod.
+
+
 
 developed by daw9000. no copywrite, free for whatever...