Jason Reiss.
Tom HillI have couple of questions around the LORAMAC Events.
1) If an Uplink is executed from the mDot and the ACK was sent by the conduit, but not received by the mDot for some unforeseen reasons, would the receive window still be open since the conduit has sent the Ack?
2) RX_TIMEOUT: Is this event fired when the receive window times out and no downlink packet is sent? Does the timeout vary based on the spread factor? If so can I get the value for this timeout in the worst case?
Thanks,
Yogesh
Tom HillDoes this documentation in the faq section for mdot on the mbed site still hold good and which would answer my second question above?
“The mDot waits for a response until both receive windows have expired. This is approximately 2 seconds. If you aren’t expecting responses to your packets, you can disable the receive timeout using the AT+TXW command.”
Jason ReissYes, the TX windows will be opened at 1 and 2 seconds after end of TX.
RX timeout will fire after a symbol timeout at the of each window. The longest symbol timeout is ~200 ms
You may find interesting info in these high level overviews as well.
https://www.lora-alliance.org/portals/0/documents/whitepapers/LoRaWAN101.pdf
https://www.thethingsnetwork.org/wiki/LoRaWAN/Overview
http://www.link-labs.com/what-is-lorawan/
Or you can also read directly from the spec.
https://www.lora-alliance.org/portals/0/specs/LoRaWAN%20Specification%201R0.pdf
Or you could dig into the reference implementation
https://github.com/Lora-net/LoRaMac-node