How to use GPIO with MQTT sample

[leo_]

Hello, i I am designing a prototype, the goal is to be able to control a small engine. This engine will be activated when a message is received in MQTT.
I currently succeeded in making communications in MQTT and in using the MQTT libraries
Now I would like to be able to control my system and to do so I need to use 7 GPIO
I saw in another topic that there were 4 pins directly controllable with the NRF9160, they are PINS : P0.10 , P0.20 , P0.0 and P0.01
Moreover I could see that it is possible to route I/O from NRF52 to nrf9160, but I do not know the method to follow.So it must be possible to use 7 PINS with the nrf9160.

Today I haven't managed to use any PINS with the MQTT sample. The use of PINS requires the libraries gpio.h and gpio.c which I tried to import without success.

How can I use PINS with this example? And what is the procedure to redirect the PINS to the NRF9160?

Thanks in advance for the help, I've been stuck on it for a while and it would be really nice to be unlocked

Léo

[Øyvind]

Hello Léo, 

Please note that our technical support staff is currently understaffed due to summer vacation, and a delayed answer must be expected.

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Have a look at the nRF9160 DK Board Controller chapter in the DK user guide. This explains how GPIO pins are connected on the board. You will need to configure the board controller in order to be able to use some GPIO pins.

The Button sample from the Zephyr repo, is a simple sample that shows you how to configure GPIO. 

Kind regards,
Øyvind

[leo_]

Very well I understand, would it be possible to have a complete answer when there is enough technical support?

From what I understand, you must first configure the NRF52 card before moving on to configuring the NRF9160. This allows you to route the PINS from one card to the other.

Is the GPIO configuration done exclusively in the Kconfig file? And I don't understand how to code in this type of file.

Also, is it necessary to import libraries to use GPIOs in the source code?

I have never done this kind of configuration and I am really stuck at the moment, some help could save my life

Thanks in advance to the nordic semiconductor team

Léo

[Øyvind]

Léo, I do recommend reading through our NCS documentation and DevZone guides and tutorials, and searching the DevZone forum for answers while waiting. In NCS v1.6.0 the Common Application Framework is introduced. 

Please note that the nRF Connect SDK is a much more advanced SDK using an RTOS to enable the advanced features of the nRF9160.