My Heltec esp32 lora v1 do not join to ttn network

#1

Hello

I have downloaded the last version from GitHub (https://github.com/HelTecAutomation/ESP32_LoRaWAN)** but the node not join to ttn

In the serial monitor of the Arduino IDE i get:
19:31:17.721 -> LoRaWAN EU868 Class C start!
19:31:17.721 ->
19:31:18.129 -> joining…
19:31:18.164 -> TX on freq 868300000 Hz at DR 5
19:31:18.265 -> DIO0:TX Done
19:31:18.265 -> RX on freq 869525000 Hz at DR 0
19:31:23.253 -> RX on freq 868300000 Hz at DR 5
19:31:26.216 -> TX on freq 868300000 Hz at DR 5
19:31:26.285 -> DIO0:TX Done
19:31:26.285 -> RX on freq 869525000 Hz at DR 0
19:31:31.259 -> RX on freq 868300000 Hz at DR 5
19:31:34.255 -> TX on freq 868300000 Hz at DR 5
19:31:34.324 -> DIO0:TX Done
19:31:34.324 -> RX on freq 869525000 Hz at DR 0
19:31:39.304 -> RX on freq 868300000 Hz at DR 5
19:31:42.288 -> TX on freq 868300000 Hz at DR 5
19:31:42.354 -> DIO0:TX Done
19:31:42.354 -> RX on freq 869525000 Hz at DR 0

At the data console of my device in ttn i get
{
“time”: “2020-12-01T19:33:32.773395808Z”,
“frequency”: 868.1,
“modulation”: “LORA”,
“data_rate”: “SF9BW125”,
“coding_rate”: “4/5”,
“gateways”: [
{
“gtw_id”: “eui-323433364c006900”,
“timestamp”: 1061649952,
“time”: “2020-12-01T19:33:32.687397Z”,
“channel”: 0,
“rssi”: -97,
“snr”: 7.5
}
]
}

Thank you

#2

hi,

I noticed that you are using SF9.

SF9 should use DR_3 for EU868_DEFAULT_DATARATE.

Could you check your EU868_DEFAULT_DATARATE?
%E5%9B%BE%E7%89%87
%E5%9B%BE%E7%89%87

#3

In my src/region/RegionEU868.h there is the next line:
#define EU868_DEFAULT_DATARATE DR_0

#4

SF9 should use DR_3 for EU868_DEFAULT_DATARATE.

Please change to DR_3.