R3

PCB version R3

• fixing BAT46WH package
• adding pull down resistor on PB2 (optional placement)
• rearranging components

Firmware

• shrinking dial buffer to avoid RAM overflow
• reducing time period between last dialed digit and the start of the DTMF sequence

First release

First release ever.

• Includes first version of the firmware
• Includes revision 1 of the PCB. This has an improvement over revision 0. The diodes have been replaced with a bigger package. This makes it easier to solder