Serial Miniature Bluetooth Receive Problem

Wireless & IoT
1

I have been working with the Serial Miniature Bluetooth for awhile now and have been able to transmit from the BlueTooth Remote to the PC at every possible baud rate. I have been trying for about the past week to transmit from the PC to the remote device. I have hooked up an o-scope and I get a constant level of 5V+ on the Tx Pin, is this normal? I cannot get anything to come out of the Tx pin other than logic level high. I may have tried to transmit on the Tx pin before at 5Vdc, would this damage the remote module?

Thanks,

Adam

2

Hi,

The BlueSMiRF is 5V tolerant so that should not have been a problem. I don’t think you could have done damage by hooking TX to TX. We fully test all units before we ship. We can certainly test the unit for you.

Email spark @ sparkfun.com

-Nathan

3

sumguy16:
I have been working with the Serial Miniature Bluetooth for awhile now and have been able to transmit from the BlueTooth Remote to the PC at every possible baud rate. I have been trying for about the past week to transmit from the PC to the remote device. I have hooked up an o-scope and I get a constant level of 5V+ on the Tx Pin, is this normal? I cannot get anything to come out of the Tx pin other than logic level high. I may have tried to transmit on the Tx pin before at 5Vdc, would this damage the remote module?

Thanks,

Adam

Hi, I think that is because you are not converting the TTL output of BlueSMiRF to RS232 level required to transmit data to a computer.

Paul