LoRa Module OTAA Not Receiving Downlink

ChirpStack Network Server
1

Hi, we are using the Feather M0 US Region 900 LoRa module to send data to a RAK7258 Gateway. We are able to receive an uplink on the TTN server, but are not receiving a downlink on the module:

000000532701: doWork job started
000000532717: Preparing to send payload
Payload value: 2
000000532745: Packet queued
000000532777: Event: EV_TXSTART
000000869486: Event: EV_TXCOMPLETE
Up: 1, Down: 1
Downlink received
RSSI: -11 dBm, SNR: 7.2 dB
Port: 0
000000900126: Event: EV_TXSTART
000001281895: Event: EV_TXCOMPLETE
Up: 2, Down: 1

000004282702: doWork job started
000004282713: Preparing to send payload
Payload value: 2
000004282746: Packet queued
000004282777: Event: EV_TXSTART
000004664222: Event: EV_TXCOMPLETE
Up: 3, Down: 1

The settings on the uplink message is:

“settings”: {
“data_rate”: {
“lora”: {
“bandwidth”: 125000,
“spreading_factor”: 10,
“coding_rate”: “4/5”
}

The RSSI and SNR is also:

rssi": -17,
“channel_rssi”: -17,
“snr”: 11.8,

Would appreciate any advice on where to start debugging and what possible issues there may be.

Thank you for your help!

2

Was this just a typo and by TTN you just mean your Chirpstack network server? TTN is The Things Network and you won’t find support here.

You mean US915?

I’ll assume you are using Chirpstack. Share an image of the device events on the devices page.

Also are those logs from the gateway or the device itself? If they are from the gateway it is showing that it is sending downlinks. Potentially your issue is a frequency mismatch, did you configure your MQTT topic prefix for us915?