Happy Easter

minor improvements and fixes

hourly chime

thanks to @venustrg

• hourly chime support, can be disabled with defining WITHOUT_CHIME
• supercap trickle charge support (do not use with lithium primary cells), can be enabled by defining WITH_CAPACITOR

short & stable

1.0.0

fix issues with newer sdcc (#33)

smaller code size

most features working:

• time display/set (12/24 hour modes)
• date display/set (with reversible MM/YY, YY/MM display)
• day of week
• seconds display/reset
• display auto-dim
• temperature display in C or F (with user-defined offset adjustment)
• alarm

code size reduced below 4k - no eeprom needed for this build
thanks to @jjmz, @darinfranklin, @ruthsarian, @tux75at, @aFewBits, et al

for STC15W40xAS variants, be sure to pass:
STCGALPROT="stc15" make flash

Note this may not work on all hardware types. Some hardware variations would need to be built manually with options. (No multi-hw building yet...)

now with more clockyness

• numerous updates and improvements.
• selectable 12/24 hour mode without resetting
• seconds view mode

Known issue: long press for setting is sometimes missed. We are still working on the button responsiveness.

Thanks to jjmz and hachi.

Now works on STC15W408AS and similar variants.
(need to pass: STCGALPROT="stc15" make flash)

If using stcgal, you only need main.hex. If you are using STC-ISP, then you will also need eeprom.hex. Look at repo readme for more info.

temperature offset adjustment

Support temperature offset calibration. (temp can be adjusted to read +/- 4 degrees)

24 hour support

12/24 hour mode selectable
note that hours get reset to zero when toggling between mode, and hours will need to be re-set. (This is due to code space restraints.)

temperature display

STC15F204EA DIY LED Clock firmware

add temperature display in Celsius

Missing Features (TODO):

• alarm/chime display/set (alarm/chime not yet working)
• 24 hour display/set (currently only works in 12h mode)