Monnit Serial MODBUS Quick Start Manual page 8

When registering your first device, the gateway will need time to
form its first network, which takes 30 seconds. During this time, the
middle LED will go red signifying there is no wired communication
available, then the third LED will start flashing while the wireless
network forms. After the first device registration is complete, any
subsequent registrations can be one right after the other, as the
network only needs to form once.
You can verify that the network is active by polling the WACTIVE coil
@ 0 / 1 address. If it now returns true, the registration of the first
wireless device is successful, and the wireless network is now
active.
Add more wireless devices using the same method, but you will not
need to wait 30 seconds after each. To see the current wireless
device count, read register @ 3 / 40004 address.
Register Name Function
WD_CNT
6. Bring Sensors Online
To bring your sensors online, insert the
battery into the sensors. Once the battery is
inserted, the wireless device does a scan to
look for the network. As long as the gateway
is ACTIVE, the sensor will link up to the
network.
Raw
Code Address
40004 3
- 8 -
Description
Wireless Device Count – Value
that can be read to discover the
number of registered sensors are
configured to operate on the
gateway. A value 0 – 50 is
permitted.
(READ-ONLY)
Example Value: 0 (no sensors
registered, factory reset condition)
Example Value: 10 (10 Registered
device)