Connecting iNEMO v2 Board UART to Bluetooth

[harinath]

Posted on April 06, 2012 at 09:08

Dear all,

I have STEVAL-MKI062V2, I could be able to compile code using IAR EW. There is COM connector for the board ( UART2 pins of STM32), jumper J4. ST says,

Note: J4 does not offer any transceiver; it is directly connected to the microcontroller pins. As this prevents any overload/over-voltage on these pins.Moreover, J4 connector also provides a 3.3 V pin which can be used to supply a RS232 transceiver. Sinking too much current from this pin could damage the board.

I want to connect J4 of iNEMO to the UART bluetooth module for wireless connection to PC.

I have Bluetooth Mate Gold from 

http://www.sparkfun.com/products/9358

  which has the following electrical connection for Arduino based AHRS module  

http://www.sparkfun.com/products/10736

I sketched electrical connections to J4 of iNEMO below. I'm not sure to go with this because I'm afraid iNEMO may be damaged.

If the above connection wrong, please any one here suggest me a way to make iNEMO wireless, using the same bluetooth module mentioned above.

Thanks

#inemo-uart-to-bluetooth

[harinath]

Posted on April 11, 2012 at 08:28

Jumper J4 (COM connector) is left without a clue to know where the 3.3v or GND pins are. We have to go for the multimeter to check them, then only we will be able to figure out those pins & rest of the pins. I don't know why this forum replies are very slow & many of the posts were not answered at all.

I found in description of COM connector, J4 that it is documented as UART2 but when we see the datasheet of STM32F103RExx it is USART2 & is connected to bus APB1 ( 24/36 MHz).

I could figure out the pins 

The above connection to Bluetooth module is correct. Find more at 

http://harinadha.wordpress.com

Thanks