Input from TEF6686 tuner

[andimik]

Several radio freaks have recently bought a tuner with TEF6686 chip inside which can be connected to USB. See https://www.pe5pvb.nl/tef6686/

Its output (ttyUSB0) is in the following format:

PA540
R0549000000000F
Ss66.5,2,35

the line starting with P contains the PI-Code (here A540)
the line starting with R consists of RDS blocks B (rdsB), C (rdsC) and D (rdsD) and a RDS error (rdsErr) information
the line starting with S shows the signal strength.

Do you think it's possible to implement this format in redsea? I tried with awk, but it seems to be too tricky for me.

For example the following log
a201_ttyUSB.txt
was filtered by RDS error = 0 (maybe other values are ok as well)
a201.spy.txt

Specification of the chip:
https://github.com/makserge/tef6686_radio/blob/master/User_Manual_TEF6686.pdf

This is the source code which creates the format:

https://github.com/NoobishSVK/TEF6686-remastered/blob/330e4d591e0b09f664e36671db0b36627dc361f8/TEF6686_remastered.ino#L2251

[windytan]

I took a look at it. The serial data looks quite odd - seems like the same group is always repeated four times, each with a different value of rdsErr. It would produce this:

A201 2010 4E91 ----
A201 2010 4E91 6368
A201 ---- ---- ----
A201 8003 ---- ----
A201 8003 C323 9AB3
A201 ---- ---- ----
A201 0018 ---- ----
A201 0018 F935 ----
A201 0018 F935 ----
A201 0018 F935 2020
...

But maybe it could work if only the ones with rdsErr=0 are accepted...

[andimik]

Let me first try to modify the firmware for the device. So put this on hold for the moment.

I'm aware that the same group is repeated several times.

[windytan]

Sure. It's practically done though, just missing some test cases :)

[andimik]

The firmware has been modified and the above mentioned bug was fixed. The following log from /dev/ttyUSB0 should be now ok.

a502_serial.txt
a213_serial.txt
a203_serial.txt
a201_serial.txt

The line with leading R and the following hex code is the correct one, of course. I already have reported that because the S line should not have the leading R, guess it will be fixed soon.

[andimik]

R line has been fixed. Should now look like this:

a502_ttyusb0.txt
a203_ttyusb0.txt
a201_ttyusb0.txt

I have tried with sed, but I have no idea how to extract the PI-Code from the P line (which is another line) so I add it manually ...

$ cat ./a203_ttyusb0.txt | sed -e '/.?/d' -e '/^S/d' -e  's/R//g' -e 's/..$//' -e '/^P/d' -e 's/^//' -e 's/^/a203/' | redsea -Eh | head -10
{"pi":"0xA203","group":"0A","bler":0,"di":{"compressed":false},"is_music":true,"prog_type":"Pop music","ta":true,"tp":true}
{"pi":"0xA203","group":"0A","bler":0,"di":{"artificial_head":false},"is_music":true,"prog_type":"Pop music","ta":true,"tp":true}
{"pi":"0xA203","group":"14A","bler":0,"other_network":{"pi":"0xA902","prog_type":"No PTY","ta":true,"tp":false},"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"0A","bler":0,"di":{"stereo":true},"is_music":true,"prog_type":"Pop music","ta":true,"tp":true}
{"pi":"0xA203","group":"2A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"8A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"0A","bler":0,"di":{"dynamic_pty":false},"is_music":true,"prog_type":"Pop music","ta":true,"tp":true}
{"pi":"0xA203","group":"8A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"0A","bler":0,"di":{"compressed":false},"is_music":true,"prog_type":"Pop music","ta":true,"tp":true}
{"pi":"0xA203","group":"8A","bler":0,"prog_type":"Pop music","tp":true}

$ cat ./a203_ttyusb0.txt | sed -e '/.?/d' -e '/^R/d' -e '/^S/d' -e  's/P//g'
a203
a203
a203
a203
a203
a203
a203
a203
a203

$ cat ./a203_ttyusb0.txt | sed -e '/.?/d' -e '/^S/d' -e  's/R//g' -e 's/..$//' -e '/^P/d' -e 's/^//' -e 's/^/a203/' | head -10
a203055911784f45
a203055a69602033
a203e54d0001a902
a203055f0e782020
a203255f20202020
a2038542c3239ab3
a203055815782020
a20385406021a201
a20305596c784f45
a2038542c3239ab3

[windytan]

Can you check out the tef6686 branch and see if it works all right?

[windytan]

It's a new command-line option for input types: redsea -i tef

[andimik]

Great! Confirmed, this works!

$ cat /dev/ttyUSB0 | ./redsea -E -i tef
{"pi":"0xA203","group":"14A","bler":0,"other_network":{"pi":"0xA502","kilohertz":95500,"tp":false},"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"0A","bler":0,"di":{"artificial_head":false},"is_music":true,"prog_type":"Pop music","ta":false,"tp":true}
{"pi":"0xA203","group":"8A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"0A","bler":0,"di":{"stereo":true},"is_music":true,"prog_type":"Pop music","ta":false,"tp":true}
{"pi":"0xA203","group":"14A","bler":0,"other_network":{"pi":"0xA502","prog_type":"No PTY","ta":true,"tp":false},"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"0A","bler":0,"di":{"dynamic_pty":false},"is_music":true,"prog_type":"Pop music","ta":false,"tp":true}
{"pi":"0xA203","group":"2A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"8A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"0A","alt_kilohertz":[88600,88800,90400,102500,103300],"bler":0,"di":{"compressed":false},"is_music":true,"prog_type":"Pop music","ta":false,"tp":true}
{"pi":"0xA203","group":"2A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"14A","bler":0,"other_network":{"pi":"0xA213","tp":false},"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"3A","bler":0,"open_data_app":{"app_name":"RDS-TMC: ALERT-C","oda_group":"8A"},"prog_type":"Pop music","tmc":{"system_info":{"is_encrypted":false,"is_on_alt_freqs":true,"location_table":1,"scope":["national"]}},"tp":true}
{"pi":"0xA203","group":"8A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"0A","bler":0,"di":{"artificial_head":false},"is_music":true,"prog_type":"Pop music","ta":false,"tp":true}
{"pi":"0xA203","group":"2A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA203","group":"14A","bler":0,"other_network":{"pi":"0xA213","tp":false},"prog_type":"Pop music","tp":true}

[andimik]

The output format has slightly changed in recent firmware version for several reasons. The only difference is, that in the "R"-Line now also the PI-Code is inserted.

Please note, that the old firmware might be still used widely.

$ cat /dev/ttyUSB0 
PA540
RA540054A52A84E5410
6

PA540
RA540255672204E6F10
40
RA540255672204E6F10
6

PA540
RA540054FED92454E00
PA540
RA540054892A8414E00
236

antenne.txt

$ cat /tmp/antenne.txt | grep R | sed -e 's/R//g'
A5402553202D205400
A5402553202D205400
A540054F5288454E01
A5400548ED524B4100
A5400548ED524B4100
A54025546F6C642000
A54005495256455200
A54005495256455200
A540054A52884E5400
A540054A52884E5400
A5402555596F752000

$ cat /tmp/antenne.txt | grep R | sed -e 's/R//g' | redsea -i hex -E
{"pi":"0xA540","group":"2A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA540","group":"2A","bler":0,"prog_type":"Pop music","tp":true}
{"pi":"0xA540","group":"0A","bler":0,"di":{"stereo":true},"is_music":true,"prog_type":"Pop music","ta":false,"tp":true}
{"pi":"0xA540","group":"0A","bler":0,"di":{"dynamic_pty":false},"is_music":true,"prog_type":"Pop music","ta":false,"tp":true}
{"pi":"0xA540","group":"0A","bler":0,"di":{"dynamic_pty":false},"is_music":true,"prog_type":"Pop music","ta":false,"tp":true}
{"pi":"0xA540","group":"2A","bler":0,"prog_type":"Pop music","tp":true}

So let me propose to add the new format, too, but keep compatibility to the old one (by checking the length of the "R"-Line).