# WIG-09555 serial port voltage

**URL:** <https://community.sparkfun.com/t/wig-09555-serial-port-voltage/47207>\
**Category:** Miscellaneous\
**Created:** [March 29, 2024, 8:29am UTC](https://community.sparkfun.com/t/wig-09555-serial-port-voltage/47207 "2024-03-29T08:29:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![paoloboatto](https://avatars.discourse-cdn.com/v4/letter/p/f1d935/32.png) [@paoloboatto](https://community.sparkfun.com/u/paoloboatto)\
**Post date:** [March 29, 2024, 8:29am UTC](https://community.sparkfun.com/t/wig-09555-serial-port-voltage/47207/1 "2024-03-29T08:29:07Z")

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I’m interested into the WIG-09555 obd II serial converter. I have to connect to a 3.3V board, not 5V tolerant. Is the UART voltage level 3.3V or 5V?

Thank you

Paolo

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<div class="post-metadata">

**Author:** ![brow](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/brow/32/6116_2.png) [@brow](https://community.sparkfun.com/u/brow)\
**Post date:** [March 29, 2024, 4:09pm UTC](https://community.sparkfun.com/t/wig-09555-serial-port-voltage/47207/2 "2024-03-29T16:09:32Z")

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The RS232 data will need to be converted for the 3.3V board.