Overlay doesn't work

[RogerYQ]

Hi there,

I am studying the nRF9160 DK with the DHT sample from Zephyr, but I fail to build it as error of "'DT_N_INST_0_aosong_dht_P_label' undeclared (first use in this function)" comes up.

how to reproduce this issue:

1.copy the DHT folder to myapp folder inside ncs/v1.4.2

2.create nrf9160dk_nrf9160ns.overlay in myapp

/ {
     dht22: &dht22{
     compatible = "aosong,dht";
     status = "okay";
     label = "DHT22";
     dio-gpios = <&gpio0 17 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
     dht22;
};
};

I also deleted the original folder "boards".

3.build and run from SES, fail due to DT_N_INST_0_aosong_dht_P_label' undeclared.

This issue can also be reproduced directly with Zephyr sample folder:

1. From SES, FIle->Opne nRF Connect SDK Project -> select ncs\v1.4.2\zephyr\samples\sensor\dht, board is nrf9160dk_nrf9160ns

2. Build and run

Could you give me hand to solve this issue?

Thanks!

Roger

[Heidi]

Hi!

The second line is giving me an error. I changed it to this in the overlay file:

     dht22 { 

and was able to build. 

Let me know if you have any other questions!

Best regards,

Heidi