# Bluesmirf com ports?

**URL:** <https://community.sparkfun.com/t/bluesmirf-com-ports/9301>\
**Category:** Wireless & IoT\
**Created:** [December 7, 2008, 10:01pm UTC](https://community.sparkfun.com/t/bluesmirf-com-ports/9301 "2008-12-07T22:01:41Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![frenk60it](https://avatars.discourse-cdn.com/v4/letter/f/6a8cbe/32.png) [@frenk60it](https://community.sparkfun.com/u/frenk60it)\
**Post date:** [December 7, 2008, 10:01pm UTC](https://community.sparkfun.com/t/bluesmirf-com-ports/9301/1 "2008-12-07T22:01:41Z")

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Hello,

I bought a bluesmirf module to remotely control an ATMEGA32 based robot (Arexx RP6).

When the connection is set it’s created a virtual COM (just one, inbound) and i can read what the ATMEGA loaded C program is is transmitting but i can’t send any command back to to it… it seems to work in one way only… I would exclude the hardware connection that seems to be ok (rx tx inverted and so on).

Should the bluetooh create one or two virtual comms to communicate with a device in both ways ?

Any help or explaination on how the bluesmirf communication should be would be apreciated.

Thanks - Francesco