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ATIM_ACW-LW8-EXT_UG_EN_V1.3ATIM_ACW-LW8-EXT_UG_EN_V1.3
1. Operating mode
The ACW/LW8-EXT is a LoRaWAN repeater available for ORANGE network. It allows to repeat uplink
and downlink frames from linked devices.
Its integration in the network is transparent as the uplink and downlink frames repeated by the smart
Extender are directly available on the Orange’s Live Objects interface with the repeated devices’ DEV-
EUI. Downlink frames latency towards repeated devices is greater than non-repeated devices due to the
8 seconds reception window’s gap.
The smart Extender only requires a power supply to be operative. Once, the devices’ list is configurated
within the Extender and after that the devices to repeat have realized their respective join phase with
the Extender, the repeating mode is active.
When the list of sensors (White List) is configured in the Extender by the operator via the Back End and
the sensors to be repeated have completed a Join phase with the Extender and have considered the
Mac Command Link_Adr_Req, the retransmission is activated.
Note 1
The Join Request will only be considered when it is transmitted on LC2 SF12 (single channel listening to
the Extender).
Note 2
At the end of the Join phase, the MAC Link_Adr_Request command is sent to the sensor to configure
and freeze the listening and the transmission of the device on LC2, SF12.
The Extender can repeat up to 8 different LoRaWAN devices.
It is compatible with Class A LoRaWAN 1.0, 1.0.1, 1.0.2 devices.
a) Monitoring
The Extender has a proper DEV-EUI and release periodically a keep alive frame, still called monitoring
message. This frame is read by the Extenders monitoring Interface and allows to visualize the following
information:
•SNR and RSSI levels of downlink frames toward the Extender in the Keep Alive Frame LoRaWAN
cycle
•SNR and RSSI sensors levels read by the Extender
The monitoring frame is used to download the repeater parameters and collect the repeating devices
states data. The following parametrization functionalities are available on the Extender:
•Réglage de la périodicité de transmission de la trame de supervision ;
•Add/Delete a device to repeat ;
•Collect the repeating devices states data:
oLast sensor’s emission
oRSSI and SNR levels read by the Extender for this sensor.
oNumber of received and missing frames
