diff --git a/src/hal/lopy.h b/src/hal/lopy.h
index 5fe522b2..83ba8290 100644
--- a/src/hal/lopy.h
+++ b/src/hal/lopy.h
@@ -14,8 +14,7 @@
 
 // Pins for LORA chip SPI interface come from board file, we need some
 // additional definitions for LMIC
-#define LORA_IO1  (23) // Pin tied via diode to DIO0
-#define LORA_IO2  (23) // Pin tied via diode to DIO0
+#define LORA_IRQ  (23)
 
 // select WIFI antenna (internal = onboard / external = u.fl socket)
 #define HAS_ANTENNA_SWITCH  (16)      // pin for switching wifi antenna
diff --git a/src/hal/lopy4.h b/src/hal/lopy4.h
index 248fc3bc..e7ef88ba 100644
--- a/src/hal/lopy4.h
+++ b/src/hal/lopy4.h
@@ -9,12 +9,12 @@
 
 #define HAS_LORA 1       // comment out if device shall not send data via LoRa
 
-#define HAS_SPI 1        // comment out if device shall not send data via SPI
+//#defin HAS_SPI 1        // comment out if device shall not send data via SPI
 // pin definitions for local wired SPI slave interface
-#define SPI_MOSI  GPIO_NUM_22
-#define SPI_MISO  GPIO_NUM_33
-#define SPI_SCLK  GPIO_NUM_26
-#define SPI_CS    GPIO_NUM_36
+//#define SPI_MOSI  GPIO_NUM_22
+//#define SPI_MISO  GPIO_NUM_33
+//#define SPI_SCLK  GPIO_NUM_26
+//#define SPI_CS    GPIO_NUM_36
 
 #define CFG_sx1276_radio 1
 //#define HAS_LED NOT_A_PIN // LoPy4 has no on board mono LED, we use on board RGB LED
@@ -23,8 +23,9 @@
 
 // Pins for LORA chip SPI interface come from board file, we need some
 // additional definitions for LMIC
-#define LORA_IO1  (23) // Pin tied via diode to DIO0
-#define LORA_IO2  (23) // Pin tied via diode to DIO0
+#define LORA_IRQ  (23)
+#define LORA_RST NOT_A_PIN
+#define SS 18
 
 // select WIFI antenna (internal = onboard / external = u.fl socket)
 #define HAS_ANTENNA_SWITCH  (21) // pin for switching wifi antenna (P12)
diff --git a/src/main.cpp b/src/main.cpp
index 2ba2268e..5a0604cc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -128,15 +128,12 @@ void setup() {
   loadConfig(); // includes initialize if necessary
 
 #ifdef BOARD_HAS_PSRAM
-  if (psramFound()) {
-    ESP_LOGI(TAG, "PSRAM found and initialized");
-    strcat_P(features, " PSRAM");
-  } else
-    ESP_LOGI(TAG, "No PSRAM found");
-#else
+  assert(psramFound());
+  ESP_LOGI(TAG, "PSRAM found and initialized");
+  strcat_P(features, " PSRAM");
 #endif
 
-    // initialize leds
+  // initialize leds
 #if (HAS_LED != NOT_A_PIN)
   pinMode(HAS_LED, OUTPUT);
   strcat_P(features, " LED");