Building ccs811 sensor Sample code on a nrf9160dk

RE: Building ccs811 sensor Sample code on a nrf9160dk

Øyvind — Tue, 04 Apr 2023 08:02:20 GMT

[quote user="kew_flex"] I've put the reset, int, and wake pins on 23, 24, and 25 as they didn't conflict with anything.[/quote]

Looking at the GPIO interfaces of the nRF9160DK it does look like these are used/conflicting, You could test with P0.00, P0.01, P0.14, and P0.15, or use pins that are not listed in GPIO interfacce

RE: Building ccs811 sensor Sample code on a nrf9160dk

kew_flex — Sun, 02 Apr 2023 21:55:59 GMT

Hi again, finally got back around to working on this.

I did the DevAcademy course and gained a lot of understanding of the device tree and overlay files etc.

I created this overlay file for the nrf9160dk_nrf9160_ns:

arduino_i2c: &i2c2 {
	compatible = "nordic,nrf-twim";
	status = "okay";
	pinctrl-0 = <&i2c2_default>;
	pinctrl-1 = <&i2c2_sleep>;
	pinctrl-names = "default", "sleep";

    /* Sparkfun Environment Combo uses second I2C address */
	ccs811: ccs811@5b {
		compatible = "ams,ccs811";
		reg = <0x5b>;
		irq-gpios = <&gpio0 23 GPIO_ACTIVE_LOW>;
		wake-gpios = <&gpio0 24 GPIO_ACTIVE_LOW>;
		reset-gpios = <&gpio0 25 GPIO_ACTIVE_LOW>;
	};
};

to add the ccs811 sensor to the board config. I've put the reset, int, and wake pins on 23, 24, and 25 as they didn't conflict with anything. The application builds successfully. However, when I flash to the 9160 dk DEVICE_DT_GET_ONE(ams_ccs811) returns a NULL pointer. As a result, device_is_ready(dev) says device is not ready and the application doesn't advance. From reading it seems this is because the device isn't initialized. How can I get it to do this?

Thanks

RE: Building ccs811 sensor Sample code on a nrf9160dk

Øyvind — Tue, 21 Mar 2023 08:46:31 GMT

[quote user="kew_flex"]I would have to use I2C to communicate with the board so should I instead be looking at the I2C examples instead of the ccs811 example? Or by adding the ccs811 to the board definition will it work?[/quote]

In order to use the sensor, you will need to add this to the Devicetree of nRF9160 DK, part of the board definition. You should be able to add the sensor to the DK by adding an overlay file in you project e.g. nrf9160dk_nrf9160_ns.overlay, and then add something similar to this configuration:devzone.nordicsemi.com/.../4834.nrf9160dk_5F00_nrf9160_5F00_ns.overlay

This is just a quick test to verify successful build as I do not have access to any type of I²C sensor i.e. CCS811

Note that the nRF9160DK has a board controller that controls the GPIO. Make sure to use pins that are not affected by this, more information found in nRF9160DK Board Controller in our Infocenter

Kind regards,
Øyvind

RE: Building ccs811 sensor Sample code on a nrf9160dk

kew_flex — Mon, 20 Mar 2023 18:51:26 GMT

Thanks for your reply. I was going to use a breakout board for the ccs811 similar to this one - link. I would have to use I2C to communicate with the board so should I instead be looking at the I2C examples instead of the ccs811 example? Or by adding the ccs811 to the board definition will it work?

For building for the thingy52_nrf52832 I did not edit the build config in any way and it still seems to fail during the linking stage.

RE: Building ccs811 sensor Sample code on a nrf9160dk

Øyvind — Mon, 20 Mar 2023 13:57:22 GMT

Hello,

The nRF9160 DK does not have the sensor CCS811. In order to build the CCS811 sample for nRF9160DK, you will need to add this to the board definition. Please note that you will need to build for nrf9160dk_nrf9160_ns

[quote user=""]but the other suggested board thingy52_nrf52832 also has the same build error as above. [/quote]

I had no issues building the CCS811 project for thingy52_nrf52832. Did you reconfigure the project in any way?

Kind regards,
Øyvind