diff --git a/README.md b/README.md
index 54c5033..f171118 100644
--- a/README.md
+++ b/README.md
@@ -22,18 +22,15 @@ Generate a PCB with the following features:
 ## Interfaces
 * USB-UART
 * GPIOs
- * RelayA
- * RelayB
- * RelayC
- * RelayD
- * FAN-PWM
- * FAN-IN
- * https://github.com/0110/EADOGS104LCD4Pi
-    * MOSI
-    * MISO
-    * SCLK
-    * CE0
-    * LCD Backlight
- * Button (optional)
-
+ * RelayA  D1/GPIO5
+ * RelayB  D2/GPIO4
+ * RelayC  D0/GPIO16
+ * RelayD  D5/GPIO14
+ * FAN-PWM D6/GIO12 
+ * FAN-IN  D7/GPIO13
+ * DS20B18 D4/GPIO2
+ * Button  D3/GPIO0
 
+## Software
+https://nodemcu.readthedocs.io/en/dev-esp32/modules/spi/
+https://forum.arduino.cc/t/esp32-spi-master-slave-file-transfer/1177128/5