LMiC does not receive Join Accept

End Devices (Nodes) LMIC
5

The output comes only once. It is generated in the setup part:

void setup() {
    Serial.begin(115200);
    Serial.println(F("Starting"));

If the sketch resets I would see this scrolling multiple times and it does not.

No reset, no sleep, basic example used from arduino-lmic library (ttn-otaa.ino) only changed pins:

// Pin mapping
const lmic_pinmap lmic_pins = {
    .nss = 10,
    .rxtx = LMIC_UNUSED_PIN,
    .rst = 9,
    .dio = {2, 6, 7},
};

appeui:

static const u1_t PROGMEM APPEUI[8]={ 0x57, 0x1D, 0x00, 0xF0, 0x7E, 0xD5, 0xB3, 0x70 };

deveui:

static const u1_t PROGMEM DEVEUI[8]={ 0xE6, 0xC7, 0x2F, 0xE7, 0x4D, 0x3C, 0xB4, 0x00 };

and appkey:

static const u1_t PROGMEM APPKEY[16] = { 0xAE, 0x66, 0xB7, 0xE4, 0x9A, 0x3F, 0x38, 0x51, 0x65, 0x7B, 0x61, 0xF1, 0x8F, 0x27, 0xBB, 0xF4 };

did not change anything else