Fix #83: Make ttn-otaa-feather-us915 work with Catena4551

examples/ttn-otaa-feather-us915/ttn-otaa-feather-us915.ino

@@ -65,12 +65,34 @@ static osjob_t sendjob;
 const unsigned TX_INTERVAL = 60;
 
 // Pin mapping
+#if defined(ARDUINO_SAMD_FEATHER_M0)
+// Pin mapping for Adafruit Feather M0 LoRa, etc.
 const lmic_pinmap lmic_pins = {
     .nss = 8,
     .rxtx = LMIC_UNUSED_PIN,
     .rst = 4,
-    .dio = { 3, 6, LMIC_UNUSED_PIN },
+    .dio = {3, 6, LMIC_UNUSED_PIN},
+    .rxtx_rx_active = 0,
+    .rssi_cal = 8,              // LBT cal for the Adafruit Feather M0 LoRa, in dB
+    .spi_freq = 8000000,
 };
+#elif defined(ARDUINO_CATENA_4551)
+// Pin mapping for Murata module / Catena 4551
+const lmic_pinmap lmic_pins = {
+        .nss = 7,
+        .rxtx = 29,
+        .rst = 8,
+        .dio = { 25,    // DIO0 (IRQ) is D25
+                 26,    // DIO1 is D26
+                 27,    // DIO2 is D27
+               },
+        .rxtx_rx_active = 1,
+        .rssi_cal = 10,
+        .spi_freq = 8000000     // 8MHz
+};
+#else
+# error "Unknown target"
+#endif
 
 void onEvent (ev_t ev) {
     Serial.print(os_getTime());