add manual and setup in README

README.md

@@ -1,8 +1,26 @@
 # TEF6686_ESP32
-Advanced Arduino based firmware for TEF6686 tuner with ESP32 board
+Advanced Tuner software for NXP TEF668x tuners with ESP32 board\
+Based on Catena / NXP semiconductors API
 
 More information: https://www.pe5pvb.nl/tef6686/
 
+## Setup
+During boot hold:
+- **BW** button to change rotary encoder direction
+- **Mode** button the flip screen
+- **Standby** button to calibrate analogue S-meter
+- **Rotary** button to switch between normal and optical rotary encoder
+
+## Manual
+- **STANDBY SHORT** PRESS: Switch band
+- **STANDBY LONG** PRESS: Standby
+- **ROTARY SHORT** PRESS: Set stepsize or navigate
+- **ROTARY LONG** PRESS: Toggle iMS & EQ
+- **MODE SHORT** PRESS: Switch between auto/manual or exit menu
+- **MODE LONG** PRESS: Open menu
+- **BW SHORT** PRESS: Switch bandwidth setting
+- **BW LONG** PRESS: Switch mono, or auto stereo
+
 ## Instalation
 **Recommended method:** You can download already compiled software and upload it using prepared script from [release page](https://github.com/PE5PVB/TEF6686_ESP32/releases).
 
@@ -26,6 +44,15 @@ More information: https://www.pe5pvb.nl/tef6686/
 
 From v1.16 you **need to** update your ESP32 boards in board manager to v2.x
 
+
+### Connecting analog signal meter
+```
+                      to meter
+                          |
+                R         V
+  IO27 -------=====-----=====---|
+               1 k     5 k POT
+```
 ## License
 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.