FOR TEF6686_RDS_PI_check.ino:

By VoXiTPro PA7AP RDS PI check, There were a lof of false pi codes. used latest version from marsel90.

Only correct PI code's are now transferred to tef-gtk. I tested some different settings the tef module has 4 errors indication.

0 : no error; block data was received with matching data and syndrome 1 : small error; possible 1 bit reception error detected; data is corrected 2 : large error; theoretical correctable error detected; data is corrected 3 : uncorrectable error; no data correction possible

but even with a small error i did get lot of false PI codes. So i decided to use zero errors.

by Eustake (marsel90) With this sketch it is recommended to use together with GTK-TEF6686 v1.1 https://github.com/marsel90-1/TEF-GTK_v1.1

FOR TEF6686AMFM.ino and TEF6686_RDS_PI_check.ino:

TEF6686 lithio 1.02 patch 2.22 AM FM XDR-GTK 1.0 by VoXiTPro changes: all warnings are removed (unsigned int to signed int did go wrong) Filters are now switchable (AUTO is max 236khz, manual you can set 311Khz) Stereo on/off Signal measurement improvements Keep filter (to do) and frequency settings when switching from AM to FM / FM to AM Settings are now from Eustake (marsel90) AGC is now switchable (now for FM/AM and reversed the settings) Removed some settings from Eustake, FMSI stereo improvement only for tef6687 and tef6689, Softmute_mod AM only, Wavegen and I2S audio (only using internal audio) You can now change settings with the antenne switch ANT A = default settings, ANT B = Improved settings, ANT C = Eustake Settings Settings are now A,B,C from eustake. D are improved settings from prog manual. AGC, Deemphasis, IF+ RF+ are now in subroutines so you can set them at other moments. If you change settings the old values will be reapplied. IF+ RF+ works now also for AM. Squelch will change volume scale for AM. if you have the right value change the define AM_VOL_SCALE too that value (now -1) /
#define AM_VOL_SCALE -1 /
If you have changed the above value squelch will be off again. Switching from AM to FM or from FM to AM filter settings are kept

Special thanks to Konrad Kosmatka, author of the original version for Sony XDR-F1HD https://fmdx.pl/xdr-i2c/ https://fmdx.pl/xdr-gtk/ Thanks also to:

• RTVDXRO his version was the base for this version https://github.com/RTVDXRO/NXP-TEF6686-Arduino-Radio
• FMDXklaas for testing
• ODJeetje
• Eustake for default and improved settings and many others ... Tested on Arduino Nano V3.0 at 5V

Filtersettings at the moment XDR-GTK/XDR filter index to TEF6686 filter =XDR-GTK FM BW FM BW AM BW* AM BW Auto Auto
9k 56k 1.1k 3k 15k 56k 1.9k 3k 17k 56k 2.2k 3k 20k 56k 2.5k 3k 24k 56k 2.9k 3k 27k 56k 3.4k 3k 32k 56k 3.9k 4k 36k 56k 4.6k 4k 42k 56k 5.2k 4k 48k 56k 6.0k 6k 55k 56k 6.9k 6k 63k 64k 7.9k 8k 73k 72k 9.1k 8k 83k 84k 10.4k 8k 90k 84k 11.3k 8k 95k 97k 11.8k 8k 108k 114k 13.5k 8k 125k 133k 15.6k 8k 142k 151k 17.8k 8k 159k 168k 19.9k 8k 177k 184k 22.1k 8k 194k 200k 24.3k 8k 211k 217k 26.4k 8k 229k 236k 28.6k 8k 246k 254k 30.8k 8k 263k 287k 32.9k 8k 281k 311k 35.1k 8k 298k 311k 37.3k 8k 309k 311k 38.6k 8k

Thanks to all who helped with this piece of software and of course the orginal writer.