Troubleshooting Article ID dl_prb002

Issue

Docklight does not display any serial data in the communication window(s) or just displays strange characters and question marks.

Applies to: Docklight (all versions)

Solution

This is probably caused by the communication settings or the cable link between your devices. Check your communication settings first. Are all settings correct (baud rate, parity settings, data bits, stop bits)? If your communication includes a parity bit, all bytes with wrong parity will displayed as a question mark ("?") in the ASCII communication window. Test the communication link between the device(s) and the PC next. Do you use the right cable? If all seems ok, you may also check your PC's COM ports. If you have two COM ports available, connect the two ports using a standard null modem cable and then run two Docklight applications in send/receive mode, one for each COM port. Try sending a "Send Sequence" from the first Docklight application and receive this sequence with the other Docklight application. NOTE: You may choose to replace the 'parity error' question mark by any other ASCII character. See the Docklight user manual, COM port settings.

Related Links

Docklight User Manual, COM Port Settings

back to the Docklight troubleshooting page

www.fuh-edv.de
Flachmann & Heggelbacher
file: docklight/support/support_dl_prb002.htm
updated: 2011-10-17

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