Astrometa dvb t2 linux

Astrometa DVB-T2

This device is commonly found on E-commerce sites that ship directly from China. The hardware supports DVB-C, DVB-T and DVB-T2.

Contents

Support

DVB-T supported since kernel 3.13, DVB-T2 since 4.6. Drivers being developed support DVB-C with 64QAM/128QAM, but not 256QAM.

Components

The device was usually shipped with these components:

• USB interface: Realtek RTL2832P
• Demodulator: Panasonic MN88473 (2013 revision: MN88472) (2018 revision: Sony CXD2837ER)
• Tuner: Rafael Micro R828D (TVR801: R820T)

The USB interface bridge for all devices are supported by rtl238xx driver. All tuners are supported by the same driver (rt820t). The demulator driver varies from version to version: it can be mn88472, mn88473 or cxd2841er.

The different revisions of the Astrometa DVB-T2 have been released under many different «brand» names. This page cannot list all of them. If you buy a new tuner from an unknown or no brand for under 30 euros or so, you will probably get some Astrometa clone.

2013 and 2014 revision look very similar. Probably, the text on the 2013 revision always reads «FM+DAB+SDR», while the 2014 one says «DVB-T/T2/C+FM+DAB». However, seller pictures do not always reflect that change and one could end up buying a random version even years later.

The 2014 revision version is also sold as «Andoer Digital DVBT2 USB TV Stick» or «Docooler YRC1415458446568TZ». Those devices are identical in appearance to the usual Astrometa devices.

TeVii sells a similar device under the name «H630». The case is black. The PCB layout is a bit different, e.g. the IR sensor is in a different position.

There is a version of the device called TVR801, which uses an unlabelled Rafael Micro R820T tuner. According to official sources, this one does not support DVB-C.

In late 2015, a version with analog video input and analog tuning capabilities was released, powered by the Conexant CX23102-11Z USB bridge. It has a different device ID (0135) and is a different device. Support is unknown.

In 2017, a clone of the 2014 version with a red PCB (original Astrometa one’s is green) also appeared on E-commerce sites that ship from China. The case looks like the H630’s, but is white with silver text that reads «DVB-T/T2/C/FM/DAB». This device is shipped in bulk in just a plastic bag with a simple stick antenna, a remote control (21 buttons) and a Mini CD that dates to 09 Jan 2017. Some sellers call it OXA ZC905500 or S SKYEE. It is also sold under the name «iViewHD» inside the case of the TVR801 and its antenna has an USB-powered amplifier. See 2018 update below!

In 2018 several clones are being shipped using the Sony CXD2837 chipset. This has a driver from kernel 4.14 onwards (it is now covered by the cxd2841er driver), but the device as a whole does not work because the RTL2832 driver has not been updated to recognise it. However, updated RTL2832 driver has been accepted to the media_tree (as mentioned here) so you can compile it yourself (see How to Obtain, Build and Install V4L-DVB Device Drivers#Retrieving_from_the_upstream_development_Kernel_tree) or use a specialized distribution such as LibreELEC (kodi appliance) which supports this device out-of-the-box, provided you enable the bundled «DVB drivers from the latest kernel (media_build)» add-on. These changes will most likely be included in the next mainline kernel. In most cases the RTL chip does not appear to be connected to the tuner, so these devices will not work for DVB-T either. Even though the chipset is different and incompatible, the same USB vendor and product IDs are used (15f4:0131). The clones with the Sony demodulator reported so far are:

• Blue coloured PCB either with a white case or a black case, both with silver writing. You (or a potential seller) can tell if this uses an incompatible Sony chip by holding it in front of (or for the black ones: directly under) a light source and see the colour of the PCB through the holes. dmesg output, lsusb -vvv output and PCB photos here
• Green coloured PCB with a case matching the 2014 revision. The only way to tell if this uses the Sony chip (or is the 2014 revision with working Panasonic chipset) is to open the case and read the part number on the chip.

All these models share the same USB IDs.

In 2020 Sam Nazarko Trading Ltd sells «DVB-T2/DVB-C TV dongle» for OSMC supported devices, but it works with most of GNU/Linux platforms. This tuner is detected as same USB ID 15f4:0131

PCBs of TVR801 and 2017 revision have the same color, the difference on the pictures comes from different lighting. There is another rare version described in Antti’s blog, which pretty much the 2017 revision with a green PCB (and has some very little differences).

RTL2832P configuration

The RTL2832P has 2 PID filter paths. One for the internal demod and one for a possible external one.

Источник

Auzeuner DVB-T2 (Astrometa 2018) driver update #567

Conversation

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kapitanf commented Jul 5, 2018

Hi Linus,
here is rtl28xxu.c rtl28xxu.h update with support cxd2837er demodulator for right function Astrometa 2018 dvb-t/t2/c stick. Works for me on linux kernel 4.17.2.

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KernelPRBot commented Jul 5, 2018

Thanks for your contribution to the Linux kernel!

Linux kernel development happens on mailing lists, rather than on GitHub — this GitHub repository is a read-only mirror that isn’t used for accepting contributions. So that your change can become part of Linux, please email it to us as a patch.

Sending patches isn’t quite as simple as sending a pull request, but fortunately it is a well documented process.

• Format your contribution according to kernel requirements
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The Linux kernel community is notoriously picky about how contributions are formatted and sent. Fortunately, they have documented their expectations.

Firstly, all contributions need to be formatted as patches. A patch is a plain text document showing the change you want to make to the code, and documenting why it is a good idea.

You can create patches with git format-patch .

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