Page | 15
Aeroqual Series 930 User Guide
Section 3
Broadcast commands are a set of special commands of the network system. Every unit that receives
the commands on the network performs the action. They are not ID specific, BROADCAST command
indicator can be considered as NETWORK_ID. These commands send out by network master and
that don't need reply at all.
* BROADCAST is a 1 byte special 930 ID that is zero *
01. Broadcast 930 standing by command, this command will set all sensor head that connected
to the network go to stand by state. The command generates no reply. To check whether a
900 unit has performed the command, the network master should check STATUS2's
STAND_BY bit.
BASE, STANDBY, BROADCAST, EMPTY, CHECKSUM
* BROADCAST - 1 byte broad cast indicator, see section 3 for its value
02. Broadcast 930 reset command; it will reset whole network sensor heads that connected to.
The command generates no reply. To check whether a 900 unit has performed the command,
the network master should check STATUS2's STAND_BY bit.
BASE, RESET, BROADCAST, EMPTY, CHECKSUM
* BROADCAST - 1 byte broad cast indicator, see section 3 for its value
Section 4
Protocol commands value and descriptions:
BASE = 0x55 command header used for network master to 930
SENSOR = 0xAA reply header used for 930 to network master
STANDBY = 0xFD command used to set sensor head standing by mode
RESET = 0x07 command to reset sensor head to normal working state
GAS_CONC_DATA = 0x10 command to request/report measured gas concentration value
TEMP_RH_DATA = 0x20 command to request temperature and humidity values
BASE_VERSION
= 0xF9 command to request/report 930 base unit version number
SENSOR_VERSION = 0xFB command to request/report sensor head version number
FACTOR_REQUEST = 0x2A command to request/report sensor head concentration ppm to
mg/m3 conversion factor and max current output scale factor
BROADCAST = 0x00 broadcast command indicator, like a special 930 ID reserved for
information broadcast
PARAMETERS_UPLOAD
= 0x19 command to upload configure settings to 930
PARAMETERS_DOWNLOAD = 0x18 command to download configure settings from 930
EMPTY = 0x00 no meanings at all, reserved space
RESERVED can be any value, not any meanings at all
CHECKSUM data stream check sum used to verify the command data stream information lost
or noise. It makes the data stream total sum to zero.
NETWORK_ID range: 0x00 -- 0xFF, 0x00 is reserved for broadcast command. 0x01 will be
the default ID when 930 has been programmed.