T1000-A on The Things Network - Question on Data Rate settings

Products & Technology SenseCAP
#1

Hey everyone,

i am testing the T1000-A (HW v1.6 / SW v2.5) on TTN and i am wondering about how it behaves with the ADR (Automatic data rate) mode on or off.
With ADR turned ON the T1000 the device can only communicate with the gateway when it is in close range. I noticed that it only sends messages with the lowest spreading factor (SF7BW125), so obviously this means it is limited in the transmission range.
So switching ADR OFF and setting the DR fields to range from DR0 to DR4, the range greatly increases as it will now send messages with higher spreading factors. However it seems as if the device is randomly picking the spreading factors for each transmission.

Is this a known behaviour and if so, what would be the recommended settings to achieve reliable communication while optimizing air-time?

#2

LoRaWAN typically prefers low-spreading factors for faster communication. The device will use the lowest spreading factor (SF7) to maximize data rate and minimize airtime, which is efficient for short-range communication but limits the range.