NRF52832 NUS and UART

[trobby]

Hello,

I am currently working on a project that requires data to be sent over Bluetooth. I currently have an NRF52832 Development board and have been trying examples and understanding the mechanics. My current setup is a teensy microcontroller that will send data through UART to the nrf52832 chip where it will then send that data over UART to the NRFconnect app.

My question is it possible to go mcu -->uart-->NRF52832-->NUS-->ble app or do I need a newer model such as the NRF52840 that has 2 UART ports.

I would also like to mention that I only need to use the RX pin for the MCU to nrf52832 because I don't care about sending feedback.

[awneil]

In the example project you have PC --> UART --> nRF52832 --> NUS. So your situation is no different to that - just replacing PC with MCU

The only thing to note is that you will either have to disconnect the Dev Kit's USB-to-UART from the nRF52832, or configure different pins.

See the Dev Kit documentation (User Guide & Schematics) for details.

[Jørgen Holmefjord]

The default pins for UART on the nRF52832 DK is described on this page. Connect TX from external MCU to RX on the DK (P0.08), and RX from MCU to TX on DK (P0.06). 

As awneil mention, you should either cut the solder bridges (SB13-16) on DK to disconnect UART from interface MCU, or use different GPIOs for UART that you define in the application code.