@kottes we need a little more information in order to assist. We need to understand whether your issue is a hardware issue or a software issue, so please respond to these questions:
When you insert the sd card that does not function, do the logs indicate the card was inserted? (use logread command to view logs)
If YES to question 1, please post the portion of the log
Post the content of /etc/config/fstab
Post the output of the command: mount
@KAKU Onion does not make that watch. This forum is for the Onion Omega serial of compute modules.
@SKS Once you have completed your Omega2 setup and connected to your Omega2 to home wifi, the access point (AP) you use to connect to your Omega2 is still functional. So if you no longer have access to your home wifi it doesn't disable the AP, so you can still use that AP to connect to your Omega2.
@arcozelo I think it would be helpful to post the schematic of your custom board. Both cables will work with the ethernet expansion so you should check you have implemented per the design guide.
https://github.com/OnionIoT/Omega2/blob/master/Documents/Omega2S Hardware Design Guide.pdf
@markimpgs have you plugged the Omega2+ into your computer USB?
Here is a thread on how you can mock up an ethernet connection without the use of a dock.
https://community.onion.io/topic/1964/omega-2-ethernet-without-ether-dock?_=1632597620423
@markimpgs my guess is this is a power issue but first I would update the firmware to the latest version
http://repo.onion.io/omega2/images/
https://docs.onion.io/omega2-docs/Firmware-Flashing-from-USB-storage.html
@nreyes According to the documentation the Arduino dock uses UART1 to communicate so you need to use ttyS1.
@EERoarEE if you prevent the mt wifi module from loading then wifi should not be enabled. Try editing /etc/modules.d/52-mt7628 and comment out mt-wifi
@proff We've all been there, the only thing that matters is that it now works.
@SKS The Omega platform is both an educational opportunity and a commercial opportunity to leverage the decades of *nix progress. This afternoon I was eating caviar and drinking Dom Perignon on my terrace. All bought and paid for by *nix and more recently by products based up Omega2 based electronic gizmoes.
@SKS it's a term used by us "oldies" to refer to Unix, Xenix, HPUX, SCO, System IV, Linux, (I'm going to throw in Coherent) etc, all of which are based up on the original Bell product (cue flames) and these days known as POSIX operating systems.
The Onion Omega2 operating system is an enhanced version OpenWrt (www.openwrt.org) which is, in simplistic terms, Linux minimised.
The wonderful thing about an OS based upon *nix is that this is an OS standard that basically runs the universe (Sorry Billy Gates) so there are endless apps to do all kinds of really useful stuff and a whole range of apps that many of us wonder why they were ever created.
Android is based upon Linux, iOS and OSX are based upon BSD Unix, so "*nix" is everywhere.
@SKS Try installing iperf3 (opkg install iperf3) then running it while you are streaming.
To evaluate if the issue is cpu performance run top and monitor during streaming
*nix has soooo many tools to troubleshoot everything, you just need to work your way through potential issues 1 by 1. This is how we learn. And how we go mad!
@nomi Please provide details of what you are trying to do and what your results are. Screen shot is useful.
@SKS The first step is to determine the root cause. Is the issue a) network performance; b) processor performance.
Perhaps if you provide a link to your video we could test for you.
@kgschlosser Not sure where they are made to be honest, they tend to warp just a tad which breaks the seal. Te hot Aussie sun can be punishing.
That looks like a fun project, I couldn't see where the rocket launcher is going to be located 
@kgschlosser I can't do anything about the operating temperature requirements, but ledchain deals with the timing variations of the different variants of addressable LEDs.
if it helps, I have some Omega2S+ in waterproof enclosures out in the hot Aussie sun, no heat sinks used. I've not had any of them fail due to heat, it's usually the enclosure leaks and they don't enjoy being submersed in water.
Hi @Prashant-Kamdar your device is not bricked, it's just confused.
When your device boots it tells you what it is "Board: Onion Omega2"
The firmware you installed was named "omega2p-v0.3.3-b251.bin" which means it is for an Omega2+. So when it's booting it is expecting to find double the flash and double the RAM (https://onion.io/omega2/)
You can fix this by doing a factory reset, the procedure for which can be found in the documentation here:
https://docs.onion.io/omega2-docs/factory-reset.html#with-the-reset-button-1
Once you have completed the factory reset then you can update again, but this time download the firmware with the nomenclature "omega2-vxxxxx" or alternatively, you can use oupgrade command detailed here:
https://docs.onion.io/omega2-docs/using-the-omega-updating.html
@kgschlosser Welcome to the community.
/etc/resolv.conf is rewritten by the dhcp client when your network dhcp server provides the lease. If you set a static ip you can also set the DNS in /etc/config/network
Perhaps you can see something in the logs that may help, try logread | grep dhcp
For controlling LEDs take a look at "ledchain" by @luz it makes controlling LEDs so easy.
https://github.com/plan44/plan44-feed/tree/master/p44-ledchain
The temperature of the device will vary depending on its load, so if you're running a lot of stuff it will get warmer but typically my devices at rest will be around 35-39° C which is about 95-102°F, so your experience is not unusual.
If you want to add stuff to the Onion Omega packages post the details in the Projects section here and members will be able to see it.
Hello @mehrdad3dgs welcome to Onion community.
The Omega2+ is basically a little computer that runs a minimalist version of linux, so of course, you can connect to your Omega2+ from the internet.
In order to determine how you connect to your Omeg2+ from the internet we need to understand how you are connecting your Omega2+ to your home/office network. Please provide more details on your configuration.
@JackHulspas Have you tried connecting the Tau to your computer?
I would guess the current draw exceeds that available, you could possibly overcome this by using the powered USB hub but I'm not sure the Omega2+ is going to have enough grunt to process the Tau image data. As I don't have a Tau I can't test for you.
@Lazar-Demin is the expert on this.