# \#form-factor

**URL:** https://forums.digi.com/tag/form-factor/3959.md

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## [And adapters for RF modules with 20 pin dip headers? How to connect to computer for programming?](https://forums.digi.com/t/and-adapters-for-rf-modules-with-20-pin-dip-headers-how-to-connect-to-computer-for-programming/20174)

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**Author:** [@torriem](https://forums.digi.com/u/torriem)\
**Replies:** 0\
**Last updated:** [January 15, 2019, 8:21am UTC](https://forums.digi.com/t/and-adapters-for-rf-modules-with-20-pin-dip-headers-how-to-connect-to-computer-for-programming/20174 "2019-01-15T08:21:15Z")

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I have some old 9xtend modules that I’d like to test to see if they are working. They have the 20 pin dip header on them. How do I connect these to a computer’s serial port so I can work with them from the the XCTU soft…