How to get Sensor value over UART from External MCU (Arduino) to nRF9160?

RE: How to get Sensor value over UART from External MCU (Arduino) to nRF9160?

Simon — Mon, 26 Jul 2021 10:16:10 GMT

[quote user="jaydip1305"]and above example can work with nRF52840 mcu instead of Arduino if yes then what should i write code for nRF52840mcu.[/quote]

The Arduino code is not compatible with the nRF52840. However, the lpuart sample i linked to should work with the nRF52840. However, you have to modify the nrf52840 overlay file like I did for the nRF9160

https://github.com/nrfconnect/sdk-nrf/compare/v1.6.0...simon-iversen:lpuart_using_normal_uart

[quote user="jaydip1305"]but the question is can't find the receiver buffer how can I receive my Arduino sensor data in main.c file can you pls give me some hints or some points.[/quote]

As you can see at this line we get the length of the received data using evt->data.tx.len. You can access a pointer that points to the receive buffer at evt->data.tx.buf.

By the way:

The code I linked you to is based on the LPUART sample but it is modified to use the normal UART driver instead (such that uart.h-->uart_nrfx_uarte.c is used instead of uart.h-->uart_nrf_sw_lpuart.c --> uart_nrfx_uarte.c). This was because this makes it possible to disable flow control and I wanted to provide you with a simple sample to start with.

Best regards,

Simon

RE: How to get Sensor value over UART from External MCU (Arduino) to nRF9160?

jaydip1305 — Fri, 23 Jul 2021 16:55:57 GMT

Hi Simon,

Thank you for the response,

I am able to communicate with nRF9160dk to Arduino.

but the question is can't find the receiver buffer how can I receive my Arduino sensor data in main.c file can you pls give me some hints or some points.

and above example can work with nRF52840 mcu instead of Arduino if yes then what should i write code for nRF52840mcu.

Thanks & Regards

Jaydip Kavaiya

RE: How to get Sensor value over UART from External MCU (Arduino) to nRF9160?

Simon — Wed, 21 Jul 2021 13:08:14 GMT

You can transfer the sensor data over UART. First you need to set up Serial communication on the Arduino

https://www.arduino.cc/en/Tutorial/LibraryExamples/SoftwareSerialExample

Then you set up serial communication on the nRF9160 DK

https://github.com/simon-iversen/sdk-nrf/tree/lpuart_using_normal_uart/samples/peripheral/lpuart

Then you connect

RX (arduino) to TX (nrf9160)
RX (nrf9160) to TX (arduino)
GND (arduino) to GND (nrf9160)

and you should be able to communicate between them.

Please let me know if you encounter any issues.

Best regards,

Simon