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Sjef Verhoeven PE5PVB edited this page 2025-03-18 10:45:24 +01:00
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Disclaimer: This Wiki is still work in progress. It may not contain all informations about the software

TEF6686_ESP32 - Advanced Tuner software for NXP TEF668x tuners with ESP32 board

TEF6686_ESP32 v.2.0 software!
It's dedicated to projects based on original PE5PVB's boards and to chinese clones that are sold by many sellers on the Internet.

Features

  • Frequency range: 65-108MHz and 144kHz-27MHz AM
  • Connection with RDS Spy, XDR-GTK, fmdx-webserver and StationList over Wi-Fi
  • Almost all RDS data
  • Automatic / manual scan
  • Squelch function
  • Battery level indicator
  • S-meter and modulation indicator
  • Various themes
  • Many languages
  • FullSearch RDS function (only TEF6687/9)
  • FMSI Stereo Improvement (only TEF6687/9)
  • AF switching
  • Memory presets

And many more...

Advanced RDS screen
Photo above showing "Advanced RDS" screen

Getting started

Setup

If you want to setup your device please hold during device boot:

  • BW button to change rotary encoder direction
  • Mode button the flip screen
  • Band button to calibrate analogue S-meter
  • Rotary button to switch between normal and optical rotary encoder
  • BW + Mode buttons to calibrate touch screen
  • BW + Band buttons to toggle screen inversion
  • BW + Rotary buttons to set all settings back to default values

Connecting analog signal meter

                      to meter
                          |
                R         V
  IO27 -------=====-----=====---|
               1 k     5 k POT

Crystal option of TEF668X

Depending on the voltage of ESP32 IO15, different crystal oscillators are supported.
Please select the appropriate resistor for the following conditions.

                         R15
                          |
                          |
                          |
  VCC_3V3_CPU -----=====--•--=====----|GND
                    R49       R48

IO15: 0V        → 9.216M
IO15: 1V        → 12M
IO15: 2V        → 55.466M
IO15: (2V~3.3V] → 4M

Manual

Screensaver triggered

  • BAND SHORT PRESS: Wakeup Screen
  • BAND LONG PRESS: Wakeup Screen
  • ROTARY CHANGE: Wakeup Screen

Screensaver disabled

  • BAND SHORT PRESS: Switch band
  • BAND LONG PRESS: Open advanced RDS viewer
  • 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 forced mono, or auto stereo
  • BW LONG PRESS: Switch bandwidth, hold button and use rotary to select value