diff --git a/targets/stm32l432/src/ams.c b/targets/stm32l432/src/ams.c
index a342513..4a7a2f7 100644
--- a/targets/stm32l432/src/ams.c
+++ b/targets/stm32l432/src/ams.c
@@ -275,12 +275,12 @@ bool ams_init()
 
 	// check connection
 	uint8_t productType = ams_read_reg(AMS_REG_PRODUCT_TYPE);
-	if (!productType)
+	if (productType != 0x14)
 	{
-		printf1(TAG_NFC,"Have no product type. Connection error.");
+		printf1(TAG_NFC,"Have no product type [0x%02x]. Connection error.\n", productType);
 		return false;
 	}
-	printf1(TAG_NFC,"Product type 0x%02x.", productType);
+	printf1(TAG_NFC,"Product type 0x%02x.\n", productType);
 	
     // enable tunneling mode and RF configuration
     ams_write_reg(AMS_REG_IC_CONF2, AMS_RFCFG_EN | AMS_TUN_MOD);