Need Two UART for GPS and GSM.

[chirag.aumraj]

Hi,

I Used nRF52832-CIAA-R in my ongoing product development.

I need two UART and one I configured PIN(P0.6 and P0.8) for GSM.

Can I use any GPIO pin as a UART for GPS? 

Thank You.

[Jakub Rzeszutko]

Hi,

1. nRF52832 has only 1 UART (or UARTE)

2. You can reconfigure UART PINs in runtime but you will not have 2 HW UARTs at time.

3. When choosing UART PINs avoid these marked as: "Low drive, low frequency I/O only."  They are defined in the documentation: 4.3 GPIO usage restrictions.

[chirag.aumraj]

Hi Jakub,

Thanks for your response.

For point #2 how can I reconfigure UART PINs for the second UART, Please share reference schematic or Doc in which two UART configure or use.

For point #3 can we use these PINs for the second UART or not?

Thank you.

[Einar Thorsrud]

Hi,

2. You simply initialize the driver and reinitialize it with a new configuration using the other pins whenever you want to switch UART pins.

3. No. You should not use any of the pins marked as "Low drive, low frequency I/O only." for UART. (You cannot use the radio and UART simultaneously if you do.)

[awneil]

chirag.aumraj said:

second UART

The nRF52832 has only one UART - it does not have a second UART!

I think the nRF52840 does have 2 UARTs ?

[SKV]

2. You simply initialize the driver and reinitialize it with a new configuration using the other pins whenever you want to switch UART pins. Is this means that we should use app_uart_init() and app_uart_close(). For to use Two UART. Is this method correct? or any other method?