I get error message(Device Not Recognized) from active sync when I try to connect the device with serial cable and using COM3 on the Bitsy Plus card. It works fine with "old" Bitsy. The difference I can see between the two cards is that old Bitsy have 5 V on CTS and Bitsy Plus has 0 V on CTS
ActiveSync requires the DTR line be connected on the device and neither the Bitsy nor the Bitsy Plus have DSR/DTR lines on COM3.
The ADS connector boards "simulate" these lines enough for ActiveSync to work by simply tying the DCD, DTR and DSR lines of the incoming device together (see the Personality Board Schematic, lower right corner of the page).
You can use a serial cable with loopbacks (the cable drawing is available at Topic 612) to achieve this if you're not using a personality board.
I think you not really understand my question our board that will have build works for "old" Bitsy not for Bitsy Plus. And we have on our board DCD, DTR and DSR connected together for COM3. But active sync works only for "old" Bitsy and I mention earlier that CTS is 0V for Bitsy Plus but for "old" Bitsy is the voltage 5V. My question again is this any difference between "old" Bitsy and Bitsy PLus. Or should I change something in register. I have change this in register: ;--------------------------------------------------------------------- ; ActiveSync Assignment ;--------------------------------------------------------------------- [HKEY_CURRENT_USER\ControlPanel\Comm] "AutoCnct"=dword:1 ;"Cnct"="com1" ; Default ;"Cnct"="com2" ; for COM2 "Cnct"="com3" ; for COM3