Hi Jesper Jakobsen,

Thank you for posting your issue here. As said, we are not familiar with the Wix tool and our Installer standalone works fine, so just to keep the post here to see if anyone have experience with the Wix tool and can help.

Regards,
Nam Dang

Hi Jesper Jakobsen,

Thank you for posting your issue here. As said, we are not familiar with the Wix tool and our Install standalone works fine, so just to keep the post here to see if anyone have experience with the Wix tool and can help.

Regards,
Nam Dang

Hi Hitesh Rohila,

Thank you for sending the information. Everything looks good. To further investigate your case, could you please provide information and test  as below:

1) Your updated SCH.

2) Do loopback test again for long time to see if issue happen any time?

3) Try with CP2102N-A02.

4) Try with other terminal software (ex: Tera term).

Regards,
Nam Dang

i created custom application for use CP2112 in MSVC2017 15.7.1 ( adding SLABHIDDevice.dll SLABHIDDevice.h SLABHIDtoSMBus.dll SLABHIDtoSMBus.lib )

sometimes there is such behavior that nothing happens on the I2Cbus
but HidSmbus_Open return HID_SMBUS_SUCCESS ( and all other commands )
In the VisualStudio in the window Output writes CHIDDevice::Close(): device not open on function HidSmbus_Close

what could have happened and how to fix it ?

Full command sequence

HidSmbus_GetNumDevices return HID_SMBUS_SUCCESS dwNumDevices=1
HidSmbus_Open return HID_SMBUS_SUCCESS
HidSmbus_GetSmbusConfig return HID_SMBUS_SUCCESS bitRate=40000 ackAddress=2 autoRespond=1 writeTimeout=100 readTimeout=100 sclLowTimeout=0 transferRetries=1
HidSmbus_SetSmbusConfig return HID_SMBUS_SUCCESS bitRate=40000 ackAddress=2 autoRespond=1 writeTimeout=100 readTimeout=100 sclLowTimeout=0 transferRetries=1
HidSmbus_SetTimeouts return HID_SMBUS_SUCCESS
HidSmbus_CancelIo return HID_SMBUS_SUCCESS
HidSmbus_GetUsbConfig return HID_SMBUS_SUCCESS vid=10C4 pid=EA90 power=50mA powerMode=0 releaseVersion=100

HidSmbus_WriteRequest return HID_SMBUS_SUCCESS
HidSmbus_TransferStatusRequest return HID_SMBUS_SUCCESS
HidSmbus_GetTransferStatusResponse return HID_SMBUS_SUCCESS status0=1 status1=1 numRetries=0 bytesRead=0

HidSmbus_Close return HID_SMBUS_SUCCESS <--  VisualStudio in the window Output writes CHIDDevice::Close(): device not open

Hi Kevin Angus,

Because CP2102 there is only QFN-28 package and also It doesn't have VIO pin, so I'm assuming that you are referring to CP2102N-QFN24. We don't have any application notes on 1.8 Volts on I/O, however, information regarding VIO pin you can find from datasheet below:
https://www.silabs.com/documents/public/data-sheets/cp2102n-datasheet.pdf

Regards,
Nam Dang

Hi Jens Fischer,

To support you, could you please follow and provide information as from below forum post:
https://www.silabs.com/community/interface/forum.topic.html/tips_for_asking_questionsregardingvcpdriverfor-6QNQ

Regards,
Nam Dang

Hi PaulJa,

Thank you for your feedback. Basically, a loopback test can confirm if our device is working as expected. So please go with your test and give your result.

Regards,
Nam Dang

Hi Hitesh Rohila,

Thank you for sending the information. Yes, it is helpful to investigate your issue. 

From your SCH, I find one thing that can cause the issue or even damage CP2102N that is you are connecting RSTb pin direct to VBUS.

Please refer to section 2.1 from datasheet below for typical connection

https://www.silabs.com/documents/public/data-sheets/cp2102n-datasheet.pdf

Also you may find below KBA be useful:

https://www.silabs.com/community/interface/knowledge-base.entry.html/2018/03/31/cp2102n_requiresav-NFly

Could you please update your design and verify the issue?

Regards,

Nam Dang

I don't think the package marking on top of the device indicate the firmware version.

You could take a look at the datasheet, section 5.3 say 040H is trance code.

Hi Hitesh Rohila,

To support your case, could you please provide some information as below:

1) Whether you are testing using your custom design, our evaluation board or any third party board? Please send SCH/Layout if this is your custom design?

2) Which is your current port setting, ex: baud rate, flow control?

3) How many board/part have you tried with and how many of those had the issue?

4) Have you tried to do loop back test by connect TX to RX on CP2102N?

Regards,

Nam Dang