Why is this not working at all?

[colinLPL]

Hello, I am sorry to open this again but I thought it would be better than to start yet another thread.

I installed my antenna above the roofline of my house this morning and, in an effort to solve the graphs data issue I mentioned elsewhere, I bought a Sandisk Extreme SD card and decided to start again. I have:

Installed FR24feed and configured it
Installed tar1090
Installed graphs1090
Enabled bias-tee with Wiedehopf's script

I am receiving zero air traffic.

I have attempted to install readsb but get the following output:

api.c: In function ‘send400’:
api.c:228:5: error: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Werror=unused-result]
write(fd, buf, strlen(buf));
^~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[2]: *** [Makefile:88: api.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory '/usr/local/share/adsb-wiki/readsb-install/git'
make[1]: *** [debian/rules:39: override_dh_auto_build] Error 2
make[1]: Leaving directory '/usr/local/share/adsb-wiki/readsb-install/git'
make: *** [debian/rules:54: build] Error 2
dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2
Something went wrong building the debian package, exiting!

And fr24feed-status returns this:

pi@raspberrypi:~ $ fr24feed-status
[ ok ] FR24 Feeder/Decoder Process: running.
[ ok ] FR24 Stats Timestamp: 2021-03-29 14:15:26.
[ ok ] FR24 Link: connected [UDP].
[ ok ] FR24 Radar: T-EGGP193.
[ ok ] FR24 Tracked AC: 0.
[ ok ] Receiver: connected (0 MSGS/0 SYNC).
[FAIL] FR24 MLAT: not running ... failed!

I thought I had followed all steps to the letter like last time when I had some issues and was helped through it. Have I gone wrong somewhere?

[colinLPL]

Also this looks right to me:

pi@raspberrypi:~ $ rtl_test -t
Found 1 device(s):
0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
[R82XX] PLL not locked!
Sampling at 2048000 S/s.
No E4000 tuner found, aborting.

[wiedehopf]

The error in readsb was fixed, install should work now.

[colinLPL]

It's working, thank you! I was absolutely stumped

[wiedehopf]

You might need to reinstall the autogain / graphs1090 now that readsb is installed.

[colinLPL]

Looks like it's working fine now, graphs1090 and all. And with the antenna finally outdoors on a mast, I am hitting over 200nm regularly and a big increase of tracked aircraft.

Thanks very much for your help.

[abcd567]

Although it is too late to tell this methos as colinLPL has already replace Pi24's dump1090-mutability by readsb, but just to complete records, and for information of Oblivian and others, on April 23, 2018, I have posted method to enable bias tee on Pi24 image with dump1090-mutabilityin following post of FR24 forum:


INITIAL TEST
https ://forum.flightradar24.com/threads/11826-RTl_SDR-v3-bias-tee-power-on-off?p=104330&viewfull=1#post104330


FINAL HOW-TO
https ://forum.flightradar24.com/forum/radar-forums/technical-matters-hardware/11523-rtl_sdr-v3-bias-tee-power-on-off?p=129854#post129854
.