Grimm Mini-LAS 11-R - Communication Interfaces: RS-232 and Bluetooth

Model 11-R
GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 32 von 83
2.9 RS-232 interface
The serial interface in the form of a 9-pin jack is on the right side panel. This interface can be used to
control the dust monitor and send the measurement data to a PC. Always use the original GRIMM
USB/RS-232 data cable with the catalogue number 1141A, see Figure 8-2. By default the RS-232 inter-
face is prioritised and can be deactivated by the USB, LAN or Bluetooth interface.
Pin assignment of the jack on the dust monitor, RS-232 to PC:
Pin2: RxD (receive data)
Pin3: TxD (send data)
Pin5: GND (signal/operating ground)
Pin8: CTS (ready to transmit)
Due to the alarm output on the 9-pin RS-232 sub-miniature jack, only use the original
GRIMM data cable.
2.10 Bluetooth interface
Bluetooth is an industry standard for the short-distance wireless transfer of data between devices. It was
developed by an international workgroup in the 1990s. The Bluetooth module installed in the 11-R has a
range of 100 m outdoors. Indoors the range can be reduced by walls and ceilings. The 11-R has a Blue-
tooth antenna as standard equipment. By connecting a Bluetooth-capable receiver (tablet PC, laptop,
smart phone with Bluetooth-capable terminal app) to your 11-R device, you can:
- Control the device through a terminal programme
- Control the device using the GRIMM-1178 software.
Connecting a PC to the measuring device via Bluetooth
Any Mini-LAS 11-R in operation is in a waiting state for Bluetooth communication. Each measuring de-
vice has a unique Bluetooth name. See the type plate on the underside of the device. Start a search for
Bluetooth devices on your computer, laptop or Windows tablet PC and select the Mini-LAS device. You
will be prompted for the password. The default password is 1234 and cannot be changed. In the termi-
nal programme, the interface assigned by the operating system (under properties) has to be selected. If
the correct interface has been selected, LED 1 on the measuring device lights up blue after the connec-
tion is established.