DLink DIR-842 C2 OpenWRT Firmware

syahmixp — Thu, 29 Aug 2019 16:46:25 +0800

This is OpenWRT firmware for DIR-842 C2 that was specifically tailored for Astrometa DVB-T2 tuner (2014 version).
I don't remember if I compiled any other dvb/tuner drivers with this.
The firmware was built based on https://github.com/openwrt/openwrt/commit/e...62049e479978951

What is included:
- Luci
- Tvheadend server
- Astrometa DVB T2 drivers (Panasonic mn88473)
- cifs
- qos
- ddns
- adblock
- extra: w_scan2 (to find frequency and channels) https://github.com/stefantalpalaru/w_scan2

Flashing

- Upgrade the factory.bin through the factory web interface or the u-boot failsafe interface. The firmware will boot up correctly for the first time. Do not power off the device after OpenWrt has booted. Otherwise the u-boot will enter failsafe mode as the checksum of the firmware has been changed.
- Upgrade the sysupgrade.bin in OpenWrt. After upgrading completes the u-boot won't complain about the firmware checksum and it's OK to use now.
- If you powered off the device before upgrading the sysupgrade.bin, just upgrade the factory.bin through the u-boot failsafe interface and then goto step 2.

Configuring Unifi
Configuring OpenWRT to connect to Unifi should look like this, although note that I don't use Unifi IPTV.
- VLAN id 500 = Internet
- VLAN id 600 = IPTV
- VLAN id 400 = VOIP

Then set the credentials at Networks > Interface > WAN

Configuring TVHeadend
tvheadend daemon should be running with this build, to access open http://router_ip:9981
Configuring tvheadend is a bit headache:
Make sure to plug your USB DVB T2 to the router.
First, a network must be added (1), then muxes (2), and then assign dvb interface to network (3) and scan (4). Finally, the result (5) must be mapped. All need to be defined manually, the muxes can be obtain via http://mytvdvb-t2.blogspot.com/ #search "senarai pemancar". My place uses 522 Mhz and 722 Mhz so it translates to 522000000 Hz and 722000000 Hz that need to be written to tvheadend settings. Alternatively, you can find frequency yourself using w_scan util provided. Just transfer the binary to router using WinSCP and set execute permission.

Once configured, tvheadend client, like TVHeadend PVR available on Kodi can be used to watch or record. To record, additional configuration is needed on tvheadend server. I just use NAS server mounted via cifs on the router itself as the record storage. The Electronic Program Guide (EPG) can be used to scheduling record or auto record for future program with same name.

This is example of my recording, can be watched on Kodi or by accessing NAS server directly.

Issues
Connection reset when accessing router web admin page
Clear your cookie, somehow the cookie from tvheadend interferes with the router web page

Download
Please note that this is a snapshot release, it means that it is likely unstable.
Once you flash this firmware, it is likely you can't go back to original firmware since no C2 firmware is publicly available.
The difference from C1 and C2 is USB. If you want to go back, see https://forum.lowyat.net/index.php?showtopi...post&p=93344481 it might help.

Download:
openwrt-dlink-dir842-c2_r10863-e1dcfe02.zip
openwrt-dlink-dir842-c2_r13136-ad27c133eb.zip
Alternatively you can use snapshot firmware that doesn't include any of DVB stuff and also without Luci web: https://openwrt.org/toh/d-link/d-link_dir-842

Thanks to https://forum.lowyat.net/user/jackcolentern for bringing OpenWRT to DIR 842 CX.

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DLink DIR-842 C2 OpenWRT Firmware