Does ADR require the use of confirmed uplinks?

With LMiC, if traffic uplink is confirmed (or better not) is controlled by the final argument to LMIC_setTxData2 (u1_t port, xref2u1_t data, u1_t dlen, u1_t confirmed);

That said, there are many network housekeeping reasons other than confirmed uplink why a network server would generate a dowlink, the thread subject ADR being one of them…

hi @cslorabox, I hope you are not tired of me, and can help-me :grin:

I am using the ABP and OTTA example from the MCCI library, in the examples already have this configuration. I also checked before writing the first time, too

LMIC_setTxData2(1, mydata, sizeof(mydata)-1, 0);

I also tried to disable link check validation before and after “case EV_JOINED” , but it did not work


I pointed again to the TTN, to have more access to the logs, every uplink , i get a downlink. You can see the pictures ? Thanks // device // device // gateway // gateway

Below, a log of downlink on gateway Dragino-LG02

(RXPKT): [up] {“rxpk”:[{“time”:“2020-07-01T21:15:14.855718Z”,“tmst”:3384576861,“chan”:0,“rfch”:1,“freq”:915.200000,“stat”:1,“modu”:“LORA”,“datr”:“SF7BW125”,“codr”:“4/5”,“lsnr”:7.8,“rssi”:-57,“size”:26,“data”:“QFoWASaALQABy6gPr2g90WGCZw+5jXlHBWE=”}]}

(TXPKT): [down] {“txpk”:{“imme”:false,“tmst”:3386576861,“freq”:923.3,“rfch”:0,“powe”:20,“modu”:“LORA”,“datr”:“SF12BW500”,“codr”:“4/5”,“ipol”:true,“size”:22,“ncrc”:true,“data”:“YFoWASaKJgADQAIAcQM1AP8Bihrl3g==”}}

For that uplink an online decoder shows it has its ADR bit set.

For the downlink it shows you’re seeing two LinkADRReq MAC commands in FOpts: 0340020071 and 033500FF01. This is unrelated to the topic at hand, but indeed related to ADR: see LMIC Library Always Does Unwanted Downlink.

I’d expect you can disable those LinkADRReq MAC commands by using LMIC_setAdrMode(0).

All said, the Dragino-LG02 is not a compliant LoRaWAN gateway, so you’re into many surprises, and you might even harm other network users in your neighbourhood by connecting that to a LoRaWAN network. You wrote you’re on some private network, maybe they allow/support that. But please don’t use that on TTN, not even for debugging.

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Hi @arjanvanb, thank you very much for the information, i’m researching everything you told me, i will also follow the recommendation on the dragino gateway, it was already off, i put it to work again just to try to get some log, something that in the private network i can’t get