IWRL6432BOOST: Question about connecting UART to external board

Alyssia White

Part Number: IWRL6432BOOST

Hi,

I can see that the UART is available via the LP/BP connectors on the back of the board. Is it possible to use these to connect to say an Arduino or ESP32 so that I can see the sensor data via that board?

Thank you.

over 1 year ago

0 Josh Dye over 1 year ago

TI__Genius 16601 points

Hello,

We are looking into your query and will get back to you shortly.

Best Regards,

Josh

0 Ankit Mohanty over 1 year ago in reply to Josh Dye

TI__Expert 7720 points

Hi Alyssia,

You should be able to use the UART via the LP/BP connectors. Please make sure the switch S1.4 is switched on to support the RS232 UART communication via LP/BP connectors.

Regards

Ankit

0 Alyssia White over 1 year ago in reply to Ankit Mohanty

Prodigy 10 points

Hi Ankit,

I've switched S1.4 to ON and restarted the board but I'm not receiving anything on my secondary board's UART.

Thanks,

Alyssia

0 Ankit Mohanty over 1 year ago in reply to Alyssia White

TI__Expert 7720 points

Hi,

By default, these signals are not brought into these pins, as a protection. If you want to take power from these connectors to external interfaces, you need to perform following board modifications.

For 5V connection:

By default, R87 resistor is not mounted, it needs to be mounted: As shown in the schematic.

For 3.3V Power:

R132 Resistor need to mount as shown below.

Please ensure that you NRESET the device after switching 1.4 ON to enable the DCA_LP_RS232.

Regards

Ankit

+1 Alyssia White over 1 year ago in reply to Ankit Mohanty

Prodigy 10 points

It turns out that I was using the incorrect pins. I was connecting GND and J9.9 to my secondary board when I should have been connecting GND and J8.5 instead.

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IWRL6432BOOST: Question about connecting UART to external board