allow switching to 8 MHz, use bit shift instead of division to calculate ...

time, poll button every 32 ms instead of 16 ms, some other small
improvements, adjusted tests

don't include avr/power.h for now

use enums instead of constants, rename "heating" to "heater"

moved button, beeper and heater pin settings to pins.h, maintain airgate ...

position in rules, added "tooLean" rule, show fire "direction" together
with current measurements

adding tests + some minor cleanup and improvements

don't measure, update and display lambda when heating is not ready since ...

these measurements are useless

added menu item/display position showing oxygen sensor heater current

replace a (rather expensive?) division in each iteration of the main ...

loop with a (less expensive?) addition

increment timebase and update display according to simulation data

removed TODO/comment

added menu position showing the time since last start/reset

compensate ADC non-linearity, update measurements also when heating is ...

off, added some comments

fixes and improvements for oxygen sensor heating control

experimental implementation of rules to notify about certain conditions ...

during burndown

refactored/renamed module "usart", use own implementation, added test, ...

updated comments, some cleanup

added ability to set beep tone and a command to test/play with beeps

- made function parameters readonly ...

- types with capital first letter
- updated comments and documentation

- use program space for unit test instances instead of data space ...

- "private" variables static
- removed updateDisplay()
- renamed some functions

- added comments ...

- fixed splitting command string into fields
- improved handling of display updates
- moved MIN/MAX macros to integers.h

moved ISRs to module interrupts

Added comment, adjusted existing tests

- Use SLEEP_MODE_IDLE instead of SLEEP_MODE_ADC (and ...

loop_until_bit_is_clear(ADCSRA, ADSC)) since it will not corrupt USART
RX/TX data and click the beep
- Use shorter commands to for less typing and memory
- Command to enable/disable logging
- Use atoi() instead of strtol() since it requires less flash and should
be sufficient here

- Set and cancel alerts ...

- Display text
- Receive USART data
- Simulation by sending measurement values via USART
- Added some commands like enabling and disabling simulation
- Some refactoring and renaming of functions
- Comments missing
- Tests missing

- Include min lambda value in max measurements and vice versa ...

- Added timer1 toggling PB1 (beeper) at 1.95 kHz
- Added initial alert module

- Other symbols for display options ...

- Measure and display only every second but update the display
additionally when the menu button was pushed

Refactored to use a timer interrupt polling the button instead of the ...

button triggering an interrupt, replaced the delay by a timer and
separated logging from updating the display

Added a simple "menu" (display options that show min and max ...

measurements since last start/reset) accessible through a pushbutton
triggering an PICINT interrupt. Added two modules "interrupts" and
"display", refactored code and added some tests.

Updated TODO

Removed license, really not necessary for such a project

Improved comment