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CCS811 ** CO2, tVOC ** I2C air quality sensor



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CCS811 breakout :: FEATURES


CCS811 sensor breakout - topCCS811 sensor breakout - bottom


PN: SS-CCS811#I2C   SKU: ITBP-6004

CCS811 ( manufactured by AMS) is an ultra-low power digital gas sensor solution which integrates a metal oxide (MOX) gas sensor to detect a wide range of Volatile Organic Compounds (VOCs) for indoor air quality monitoring.
- equivalent CO2 range is 400ppm up to 29206ppm.
- equivavent TVOC (Total Volatile Organic Compound) output range is from 0ppb up to 32768ppb.
- ambient temperature range for operation -40 ~ +80C.
CCS811 datasheet

CCS811 breakout features:
* input voltages between 3.3-5V
* I2C interface, 3.3-5V auto [default I2C voltage follows the Vin powering voltage]
* I2C voltage option via solder jumper [Eg.: power at 5V and I2C at 3.3V; power and I2C at 2.2V]
* alternative sensor I2C addresses via solder jumpers
* compatible with Arduino (all), Raspberry PI (all) and other SBC / MCU
* Arduino C, Raspberry PI [Python] software support
* compatible with xyz-mIoT boards(Arduino Zero like)
* big soldering pads on 2.54 mm [0.1"] pitch for standard row header / connector

* 13x27mm, around 2grams

Additional CCS811 signals are available on PCB bottom: WAKE on PAD6, RESET on PAD7 and INTERRUPT on PAD8.
 

CCS811 breakout :: INTERFACES, PADS and SOLDER JUMPERS

s-Sense CCS811 sensor breakout top - pinout description

I2C and POWERING INTERFACE

In the left edge of the top PCB side, top to bottom:
1. Vin - POWER IN 3.3V / 5V (default) *
2. 3V3 - Vdd - LDO output (default) / LDO bypass IN **
3. SDA - I2C SDA [default, pulled up at Vin]***
4. SCL - I2C SCL [default, pullup up at Vin]***
5. GND - POWER and I2C GROUND
 * Default, the I2C reference voltage follow the Vin voltage. If your board (Arduino/other) it's 5V compliant, connect +5V to Vin. Similar, for 3.3V compliant board(RPI/Arduino)connect 3.3V source to Vin.
** 3.3V voltage it's available on Vdd PAD, if Vin it's connected to 5V. Bypass LDO - see schema and read docs.
*** Default, the I2C reference voltage follows the Vin voltage! Read bellow about I2C reference voltage and s1 solder jumper.

SOLDER JUMPERS

s1 : I2C reference [Vin or 3V3-bypass], default Vin *
s2 : CCS811 I2C address [0x5A/0x5B], default 0x5A *
s3 : reserved
* Read about s1 and s2 functionality bellow.

s-Sense CCS811 sensor breakout bottom - pinout description

SIGNALS INTERFACE and MARKING

In the left edge of the bottom PCB side, top to bottom:
6. CCS811 WAKE* input (active LOW)
7. CCS811 RESET* input (active LOW)
8. CCS811 INTERRUPT* output (w. pullup**)
 9. RESERVED
 nc. NOT CONNECTED
 * In order to wake the CCS811 sensor, the WAKE signal must be shifted and kept at LOW level (connect directly to GND or controlled via MCU digital port).
* Read about CCS811 WAKE, RESET and INTERRUPTS in CCS811 documentation!
* Taking a look at howto posts and inside software examples may be quite helpful.
** Default HIGH.

 Observe the sensor breakout marking on PCB board (here, CCS811 sensor is marked as populated).

 

CCS811 breakout :: Arduino / Raspberry PI basic interfacing
CCS811 breakout Arduino 5V [Eg.: UNO] Arduino 3.3V [Eg.: Zero] RPI [B/B+/II/3/3+/Zero/Zero W]
Vin PAD* 5V 3.3V PIN1 (3.3V)
Vdd PAD (3V3)* - - -
SDA PAD SDA SDA PIN3 (SDA)
SCL PAD SCL SCL PIN5 (SCL)
GND PAD GND GND PIN9 (GND)
6 - CCS WAKE ** D5 / GND D5 / GND PIN9 (GND)
7 - CCS RESET *** - - -
8 - CCS INT *** - - -
 
* here, power in default mode (sensor & MCU power and I2C at same voltage!!). For alternate mode see solder jumper description bellow.
** PAD6 - CCS811 WAKE, when connected to GND, the CCS811 will avoid enter into SLEEP mode [sensor it's ACTIVE].
*** CCS811 RESET (input) and INT (output) signals are default HIGH level. Active state, for both signals, in LOW level. Read CCS811 docs.
 
 

CCS811 breakout :: solder jumpers description; power scenarios


s1* - I2C reference voltage selector - shipped with circuit 1-2 closed and circuit 2-3 open (default mode).

In default mode, the I2C reference voltage follows the voltage applied to Vin! Default mode use cases:
      - shield/MCU it's 5V compatible ==> connect Vin at 5V; the I2C reference it's 5V!
      - SBC/shield/MCU it's 3.3V compatible ==>connect Vin at 3.3V; the I2C reference it's 3.3V!.

Alternate mode - I2C reference voltage follows the Vdd voltage! - modify s1 as: 1-2 circuit open, 2-3 circuit closed [carefully interrupt/cut the circuit line between pads 1 and 2, and solder over pads 2 and 3].

Alternate mode scenarios:
      - apply 3.6-7V to Vin. The I2C reference voltage it's set at 3.3V! Also, at Vdd pad (LDO output) 3.3V (up to 100mA) it's available for third part powering (anyway, try to keep the sunk current as low as possible, in order to avoid thermal errors).
      - keep Vin not connected. Apply 2.8 or 3.3V to Vdd (the LDO it's bypassed). The I2C reference voltage it's set at voltage applied to Vdd pad!

s2 - CCS811 I2C address - default circuit open, CCS811 having 0x5A as I2C address. Solder over s2 pads [circuit closed] in order to select the alternate I2C address [0x5B].

* Consult s-Sense block schema for more information. See projects/how to section.

CCS811 breakout :: ARDUINO & RaspberryPI software 

s-Sense air quality and environmental sensors examples for Arduino and RaspberryPI may be downloaded from our download page.


CCS811 breakout :: DOCUMENTATION DOWNLOAD/ONLINE

The s-Sense environmental sensors documentation can be found here.


CCS811 breakout :: ARDUINO & RaspberryPI projects

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document version 0.9142 / 2020-08-07 © R&D Software Solutions srl