Connecting to UART on Thingy:53

RE: Connecting to UART on Thingy:53

avielbr — Thu, 09 Mar 2023 17:54:09 GMT

Thanks for your help, Runar.

RE: Connecting to UART on Thingy:53

runsiv — Thu, 09 Mar 2023 13:01:11 GMT

Hi,

As long as the pins are not used for anything else, you are free to configure them as UART. "This device provides flexibility when it comes to routing and configuration of the GPIO pins. However, some pins have recommendations for how the pin should be configured or what it should be used for."

infocenter.nordicsemi.com/.../pin.html

Regards

Runar

RE: Connecting to UART on Thingy:53

avielbr — Thu, 09 Mar 2023 09:09:03 GMT

Hi, OK I do see that, thanks. However I see them only listed as SDA & SCL, not UART Tx / Rx.

I appreciate your help so far. Before I start hacking away I want to make sure that these pins do in fact work as a UART interface. I'm surprised this isn't defined clearly in the documentation because everything else seems quite thorough.

RE: Connecting to UART on Thingy:53

runsiv — Thu, 09 Mar 2023 08:54:53 GMT

Hi Avi

They are listed as EXP_BOARD_PIN1 and EXP_BOARD_PIN2. However if you look in the pin map they are also described as P0.04 and P0.05

Regards

Runar

RE: Connecting to UART on Thingy:53

avielbr — Thu, 09 Mar 2023 07:53:45 GMT

Hi Runar,

In the diagram you sent I don't see P0.04 & P0.05 listed on the expansion board.

RE: Connecting to UART on Thingy:53

runsiv — Thu, 09 Mar 2023 07:37:24 GMT

Hi.

1. I don't think there are any good way to solder a connection to the pins. As I wrote in the my first post the thingy is limited in terms of easy accessible GPIO pins.

2. You can either use Stemma/Qwiic/Grove to access the 4 pin JST connector

infocenter.nordicsemi.com/.../qwiic_stemma_grooveif.html

Regards

Runar

RE: Connecting to UART on Thingy:53

avielbr — Wed, 08 Mar 2023 10:00:38 GMT

Ok, a couple questions:

1. What does "depending on the use" mean in reference to P0.04 & P0.05? What does this depend on?

2. How are those pins physically accessed on the thingy:53?

RE: Connecting to UART on Thingy:53

runsiv — Wed, 08 Mar 2023 08:53:18 GMT

Hi,

its possible to connect a device over UART to the thingy53. The thingy53 is limited in terms of easy accessible GPIO pins but you can see the pin map here: https://infocenter.nordicsemi.com/topic/ug_thingy53/UG/thingy53/hw_description/pin_maps.html?cp=15_2_3_4

Depending on the use I think P0.04 and P0.05 could work.

Here's an unofficial example for low power UART created by one of my coworkers you can look to for inspiration

https://github.com/nrfconnect/sdk-nrf/tree/main/samples/peripheral/lpuart/boards

There is also an example in the nRF Connect SDK for low power UART in located in "NCS/v2.x.x/nrf/samples/peripheral/lpuart/"

Regards

Runar