# Serial port E in RCM5700

**URL:** <https://forums.digi.com/t/serial-port-e-in-rcm5700/9149>\
**Category:** Rabbit\
**Created:** [February 10, 2009, 9:11am UTC](https://forums.digi.com/t/serial-port-e-in-rcm5700/9149 "2009-02-10T09:11:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Dmitry1](https://avatars.discourse-cdn.com/v4/letter/d/f14d63/32.png) [@Dmitry1](https://forums.digi.com/u/Dmitry1)\
**Post date:** [February 10, 2009, 9:11am UTC](https://forums.digi.com/t/serial-port-e-in-rcm5700/9149/1 "2009-02-10T09:11:11Z")

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Serial port E (RCM5700) only works in the sample �ETHERNET\_TO\_SERIAL.C�, differences in the initialization of my projects and other samples in two variables:  
// Select correct pins for serial port E output  
#define SERE\_TXPORT PEDR  
#define SERE\_RXPORT PEDR

When I declare them in other projects, serial port E not working. Please tell me how to initialize serial port E in RCM5700?

Thanks!