diff --git a/README.md b/README.md
index dfd032f..533f383 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,10 @@
 The ESP8266 variant can display a flat response between 100Hz and 5.2Khz and is limited by the ADC conversion time.
 
 The ESP32 variant, can display a flat response between 50Hz and 20Khz and is less limited by ADC conversion time and uses 512 samples for improved resolution. It could be optimised even further for a wider freqencuy response.
+
+To load the Arduino FFT library:
+1. In the IDE menu, select Sketch, Include Library, Manage Libraries, then search for 'FFT'
+The correct version is :// https://github.com/kosme/arduinoFFT
+
+Do the same for the SQUIX SSD1306 display driver library.
+