User Manual

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RS485 to LoRaWAN Converter User Manual 27 / 29
6. Trouble Shooting
6.1 Downlink doesn’t work, how to solve it?
By default, LT will open two RX windows to get downlink message after uplink. If the server’s
radio parameter is not match with the radio parameters in downlink, the downlink message
won’t arrive. And in UART access to LT, user will see below message:
txDone
rxTimeout
rxTimeout
If user see below output:
txDone
rxDone
rxTimeout
It means the downlink message arrive but not parse. In this case, user need to set FPORT=2 in the
server side for downlink message.
6.2 Why I can’t join TTN in US915 /AU915 bands?
It is about the channels mapping. Please see this link for detail.
7. Order Info
Part Number: RS485-LN-XXX
XXX:
 EU433: frequency bands EU433
 EU868: frequency bands EU868
 KR920: frequency bands KR920
 CN470: frequency bands CN470
 AS923: frequency bands AS923
 AU915: frequency bands AU915
 US915: frequency bands US915
 IN865: frequency bands IN865
 CN779: frequency bands CN779
8. Packing Info
Package Includes:
 RS485-LN x 1
 Stick Antenna for LoRa RF part x 1
 Program cable x 1