the ignition is triggered through a pin change interrupt isr on pin rb0, but if i include the software serial lib. the timing for ignition is stored in the eeprom and should be changeable through a serial connection (arduino nano attiny). Hi, i want to build a programmable cdi ignition system for my scooter with a attiny85 µc. Attiny85 master i2c attiny85 slave i2c uart. i imagine that you could use 19,200 or 38400 baud if you used the. i have only tested this at 9600 baud rate but it has worked perfectly so far. to use software serial you must have set the internal oscillator to 8mhz. ![]() you just have to use the standard software serial library and define the rx and tx pins.
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