zephyr

History

Aksel Skauge Mellbye bc6c363bc9 boards: silabs: Consistently name dev kits Rename all Silicon Labs dev kits to always use the official kit name as board target name. Previous kit names used various naming schemes, including putting part of the SoC name in the board name. With HWMv2, SoC names (if needed) should go in the SoC board qualifier. Use HWMv2 revisions for the two variants of SLTB010A. Split the xG27 Dev Kit from the EFR32BG22 Thunderboard. This attempt at deduplication is confusing due to the very different kit names and use of different ICs (BG22 vs BG27), and was not continued with the xG24 Dev Kit, meaning that it wasn't consistent. Signed-off-by: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>		2024-06-12 12:52:28 -04:00
..
boards	boards: silabs: Consistently name dev kits	2024-06-12 12:52:28 -04:00
src	samples, tests, boards: Switch main return type from void to int	2023-04-14 07:49:41 +09:00
CMakeLists.txt	cmake: increase minimal required version to 3.20.0	2021-08-20 09:47:34 +02:00
Kconfig	samples: sensor: ccs811: update for new capabilities	2020-01-14 15:44:09 -06:00
prj.conf	sensors: Remove unnecessary Kconfig setting of sensors	2022-07-25 15:18:56 +02:00
README.rst	hwmv2: Introduce Hardware model version 2 and convert devices	2024-03-02 16:56:33 -05:00
sample.yaml	boards: silabs: Consistently name dev kits	2024-06-12 12:52:28 -04:00

README.rst

.. _ccs811:

CCS811 Indoor Air Quality Sensor
################################

Overview
********

The CCS811 digital gas sensor detects volatile organic compounds (VOCs)
for indoor air quality measurements. VOCs are often categorized as
pollutants and/or sensory irritants and can come from a variety of
sources such as construction materials (paint and carpet), machines
(copiers and processors), and even people (breathing and smoking).  It
estimates carbon dioxide (CO2) levels where the main source of VOCs is
human presence.

Building and Running
********************

Building and Running on thingy52/nrf52832
=========================================

.. zephyr-app-commands::
   :zephyr-app: samples/sensor/ccs811
   :board: thingy52/nrf52832
   :goals: build flash
   :compact:


Sample Output
=============

The sample output below is from a `Nordic Thingy:52
<https://www.nordicsemi.com/Software-and-tools/Prototyping-platforms/Nordic-Thingy-52>`_
(thingy52/nrf52832) that includes this sensor (and others).
After a soft reset, there is a 5-second startup period
where readings are unstable, and then we can see steady
reported measurements of about 400 ppm eC02 and 0 ppb eTVOC.

.. code-block::console

   *** Booting Zephyr OS build zephyr-v2.1.0-310-g32a3e9907bab  ***
   device is 0x20001088, name is CCS811
   HW 12; FW Boot 1000 App 1100 ; mode 10

   [0:00:00.046]: CCS811: 65021 ppm eCO2; 65021 ppb eTVOC
   Voltage: 0.000000V; Current: 0.000000A
   BASELINE fff4
   Timed fetch got 0

   [0:00:01.059]: CCS811: 65021 ppm eCO2; 65021 ppb eTVOC
   Voltage: 0.000000V; Current: 0.000000A
   BASELINE fff4
   Timed fetch got 0
   Timed fetch got stale data
   Timed fetch got stale data
   Timed fetch got stale data

   [0:00:05.084]: CCS811: 400 ppm eCO2; 0 ppb eTVOC
   Voltage: 0.677040V; Current: 0.000014A
   BASELINE 8384
   Timed fetch got 0

   [0:00:06.096]: CCS811: 405 ppm eCO2; 0 ppb eTVOC
   Voltage: 0.675428V; Current: 0.000014A
   BASELINE 8384
   Timed fetch got 0

   [0:00:07.108]: CCS811: 400 ppm eCO2; 0 ppb eTVOC
   Voltage: 0.677040V; Current: 0.000014A
   BASELINE 8384
   Timed fetch got 0

   [0:00:08.121]: CCS811: 400 ppm eCO2; 0 ppb eTVOC
   Voltage: 0.677040V; Current: 0.000014A
   BASELINE 8384
   Timed fetch got 0

   [0:00:09.133]: CCS811: 400 ppm eCO2; 0 ppb eTVOC
   Voltage: 0.677040V; Current: 0.000014A
   BASELINE 8384
   Timed fetch got 0

   [0:00:10.145]: CCS811: 400 ppm eCO2; 0 ppb eTVOC
   Voltage: 0.677040V; Current: 0.000014A
   BASELINE 8384
   Timed fetch got 0