How to send sensor data using AT commands to a device using Uart in segger embedded studio

[Rajbir Singh]

Hi, I am new to NRF and segger embedded studio.

So I want to send temperature sensor data connected with nrf52840 DK to the Murata1_SC  device using UART.

The data will be sent using AT Commands.

So how to send AT Commands in Segger embedded studio.

Thank you for the help in advance.

[Rajbir Singh]

I am using an nrf52840 nordic device, I just want some example code on how to send AT commands using nrf52840.

And I have experience in Arduino programming and raspberry Pi

[awneil]

AT commands are just text strings.

So start with  just sending text strings to a terminal.

Then do receiving text strings from a terminal.

There are plenty of resources around the interwebs about doing AT Commands

https://devzone.nordicsemi.com/f/nordic-q-a/14939/interfacing-an-nrf51-with-an-esp8266-using-at-commands-over-uart/56988#56988

https://www.avrfreaks.net/comment/2928456#comment-2928456

https://community.arm.com/developer/tools-software/tools/f/keil-forum/49079/quectel-m66-with-stm32l053r8/171345#171345

https://devzone.nordicsemi.com/f/nordic-q-a/20504/unable-to-communicate-sim800l-core-board-with-nrf52-through-uart/79935#79935

As noted in that last thread, don't make the classic mistake of just using "blind" delays - ignoring responses from the module:

https://www.avrfreaks.net/comment/2139451#comment-2139451

EDIT

You didn't answer:

awneil said:

Will you be using nRF5 SDK, or nRF Connect SDK

[Rajbir Singh]

I am using nr5 SDK and just working with UART example

Suppose this is my AT Command 

AT%CERTCMD="DIR"%CERTCMD:murata_1sc_cert.pem,cert.pem,privatekey.pem,murata_private.key

so how should i Send this command .

app_uart_put("AT%CERTCMD=\"DIR\"%CERTCMD:murata_1sc_cert.pem,cert.pem,privatekey.pem,murata_private.key")

So the above way is correct or not?

Please help!!!

[Hung Bui]

Hi Rajbir, 
Before trying to send AT command, please get familiar with how you can use UART. 

Try testing with the UART example in the SDK and verify the output with a terminal on PC. (Connect your board to PC to test first)

[awneil]

Rajbir Singh said:

Please help!

please pay attention to the advice being given:

awneil said:

start with  just sending text strings to a terminal.

Then do receiving text strings from a terminal

Hung Bui said:

Before trying to send AT command, please get familiar with how you can use UART

Don't leap straight into AT Commands before you have thoroughly understood how to use the UART to send strings, and receive strings.

See: www.avrfreaks.net/.../1138166