see How should I wire an RFM95 to an ESP8266/WeMos D1 mini?
D8 (GPIO15) -> NSS
D5 (GPIO4)->SCK
D7 (GPIO13)->MOSI
D6 (GPIO12)->MISO
D1(GPIO5)->DIO 0
D2(GPIO4)->DIO 1
const lmic_pinmap lmic_pins = {
.nss = 15,
.rxtx = LMIC_UNUSED_PIN,
.rst = LMIC_UNUSED_PIN,
.dio = {4, 5, LMIC_UNUSED_PIN},
};
seems ok … check again 