This is for the latest version 2.2
Upgrade your Ultra Picokeyer to the latest firmware version. This is just the chip, not the complete kit. There is no need to return your old chip. Here's a log of changes made (and bugs fixed) since the Ultra-PK was introduced. NOTE: All settings and messages are contained in the chip's memory, so after replacing your chip,you will need to re-record messages and change any settings you have customized.
Added - 4 additional message memories (8 total)
Added Bank/BK menu to select bank 1 or 2, each with 4 message memories
Re-scan of key now responds with "P" for paddle, "K" for straight key
Fixed short menu mode for MENU and MYCALL
Fixed paddle/straight key detect in all cases
Improved memory stacking button response. Messages can be stacked up to 4 deep.
Pressing the same memory button while a message is playing will terminate the message.
Added ~ 32 second timeout to setup menu
Fixed beacon delays > 25 seconds
Fixed memory stacking (multiple buttons pressed)
Fixed message record backspace (8 dits) to leave the space after the previous word
Fixed use of multiple /Snn commands in a message
Disabled BOR for power reduction, and to fix problems with chips resetting when buttons or paddles are pressed.
Improved paddle response during message transmission
Fixed message save issue that was truncating messages at 64 bytes, followed by a compiler bug that was corrupting longer messages.
Fixed sidetone during speed announcement, QSO decrement and tune mode
Fixed message record with sidetone OFF
Fixed letter spacing (L) = 1
Changed multi-press button scan timing to make it more reliable
Fixed auto letter spacing and multi-button interaction