Issues with spreading factor and command errors
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Home › Forums › Conduit: mLinux Model › Issues with spreading factor and command errors
Tagged: adr, mDot, sf, Spreading Factor
Felix Galindo.
Felix GalindoI am using mLinux Lora gateway and lora mdots (US 915MHz). I have a few questions and some confusion on some issues I am encountering.
1. There seems to be a mismatch between spreading factor on mDot and mlinux lora gateway. When an I tell the mDot to transmit data to the gateway, in the received message info printed out by the GW, the data rate shows SF10BW125. I assume that means a spreading factor of 10 with BW of 125. According, to mDot manual (pg 67 of http://www.multitech.com/manuals/s000643_1_1.pdf), at a SF of 10 , I am limited to 11 bytes of payload yet I am able to send more than that. So I issued an at command “AT+ADR?” on the mDot and returned a spreading factor of 9. Why is there is a mismatch? 9 seems to be what the mDot is set to and not 10.
2. Turning on ADR: How do you turn on ADR? “AT+ADR=1”? What is needed to be set on the GW for this to be work? How does ADR select the spreading factor?
3. AT+SDR? and AT+ANT? are shown to be valid commands in this doc:http://www.multitech.com/manuals/s000643_1_1.pdf but the mDot says “Command not found”.