Radio RX timeout when data rate is greater than 2.

[maivananh111]

I am using sx1262 and source code from this repository to implement a LoRaWAN end device class A 1.0.3, region AS923 with ADR enabled, join and uplink process is ok, however it cannot receive downlink or confirm every time ADR is enabled and DR is greater than 2, like 3, 4, 5. After DR is decremented each time even DR2 cannot receive downlink, however if ADR is disabled and everything happens only at DR2 then there is no problem. I think the problem is not in the hardware, because the normal transmission and reception tests are normal. LoRaWAN 1.0.2 uses a different code on this hardware and it works fine and can receive downlinks at DR3, 4, 5. I noticed that every time the RadioSetRxConfig function is called with DR greater than 2, then RadioRx is called, the SX1262 immediately generates a TX_RX_TIMEOUT interrupt, which is not the RX timeout timer. This Radio library for version 1.0.3 was used for version 1.0.2 but did not have this problem. I checked on the gateway as a server, it does send downlinks to the terminal. What is the cause of this problem? Thanks.

[maivananh111]

And this is with ADR turned off, all processes are done with DR2 from the start, I actually tested longer and they had no problems at all.

[maivananh111]

I found this rxConfig->WindowTimeout value in RegionAS923.c, in LoRaWAN source code version 1.0.2 this value is replaced with 0. However in version 1.0.3, if I fix this value to 0, SX1262 does not generate TX_RX_TIMEOUT interrupt anymore, but RX timeout timer overflows after 3000ms.