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AS7221

Smart Lighting Command Interface

Datasheet

• PUBLIC

DS000479

• v4-00 • 2019-Jun-28

│ 39

Command

Direction

Description

Format

Value Range

Default

ATSnFLAGS

R/W

This command is used

to enable/disable

configuration flags like

daylight control, color

tuning, dimming,

auxiliary and calls

directly the related

commands: ATDL,

ATCT, ATDE, ATXE

HEX

0x0001

– Enable DL

0x0002

– Enable CT

0x0004

– Enable DIM pin

0x0008

– Enable AUX pin functions

0xFFFF - Value not used

0xFFFF

ATSnON

Set scene n to be

on/off.

DEZ

1: ON, 0: OFF

ATTSON

Read scenes on/off

status.

HEX

Each bit for one scene

0x0000

2C Configurations and UART-I2C Data Bridge

ATESP

Read the single 16-bit

sum to determine

availability of natively

supported I2C devices

HEX

Bit0: ams TSL4531 or TSL2572

Bit1: ams ENS210

Bit2: HTU20D (ESP1 only- obsolete)

Bit3: ams CCS811

ATTEMPX

Read the external

temperature in degrees

Celsius

DEZ

-40

– 125°C (format: XXX.XX)

ATRHX

Read the external

humidity in percent

DEZ

– 100% (format: XXX.XX)

ATECO2

Reads the eCO2 [in

ppm] value from the

external gas sensor, if

available

DEZ

400 ppm

– 64000 ppm

0 - Means that values will be measured,

but internal calibration is not finished (wait

1min)

ATTVOC

Reads the TVOC [in

ppb] value from the

external gas sensor, if

available

DEZ

0ppb

– 64000ppb

ATI2C

Perform a single write

to the I2C bus at the

specified 7-bit device

using the 8 bits of

specified data.

Supports also a single

value)

ATI2C=<7-bit_address>, <8-bit_reg>,

[<8-bit_data>]

- [<8-bit_data>] is optional

Examples:

- ATI2C=50,0x12, 0xFF: Writes value

0xFF to register 0x12 on device address

- ATI2C=50,0x12,: Set register 0x12 on

device address 50

ATI2C

Perform a single read

from the I2C bus at the

specified 7-bit device

address and 8-bit

8 bits of data or

ERROR

HEX

ATI2C=<7-bit_address>, <8-bit_reg>

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