Posts made by William Scott

Just past 31 seconds is indicative of a power supply issue as well as the symptoms. That's ironic as you clearly took some precautions. Here are some thoughts:

1. Thick wires - good as this lowers inductance. If there's any appreciable wire length, twist them up. The twisted pair won't benefit you with this issue but will make your system less susceptible to nearby emitters as well as be less of a transmitter. This is a good general practice.

2. 100uF bypass near power pins - good to have a nice size bulk cap nearby. You may need smaller caps as well for their higher frequency discharge capabilities. I doubt that is the issue.

3. The lab power supply is where I would point my suspicion. What is the voltage (presumably 3.3 as you're applying directly to device)? What is the peak current capability of the power supply? Does the supply have a current limiting feature and, if so, is it on?

The O2+ has a large peak in required current as the WiFi system comes up, right around 31 seconds. Likely something in your general power supply circuit is limiting charge to the device as peak charge is required.

Best of luck!
Bill

@crispyoz Yep....I knew that! ;^)

@crispyoz You fell down? Cause? Fosters?

@Nagarjuna-Reddy Off the top of my head I would say the Onion server can see client meta-info only down to the IP layer (3) whereas the media from client to it's first hop is at layer 2 (link). @Lazar-Demin can correct me if I'm wrong, but I've gotta bet there's no means to tell how clients are connected at that level.

--Bill

@tjoseph1 Good work! I'd like to re-emphasize for all newcomers that "power supply", as opposed to "THE power supply", is critical. Of course THE power supply must be able to satisfy peak current demand. The overall power supply also includes any cabling which may provide enough inductance that a power supply barely over the minimum required capability may be inadequate at the power pins of the Omega. It is only the available current at the Omega power pins that matter, not what an upstream subsystem can provide.

--Bill

@tjoseph1 Good work!

--Bill

@tjoseph1 No mistakes I'm aware of or opinionated about. Really seems to me there have been a number of problems on the forum recently that seem to smell like power supply problems. Keep on keepin' on!

--Bill

@tjoseph1 I'm with you, hence the sarcastic humor. Keep hammering at it and you'll get it! When you need help, we're here for you, then before you know it, you're one of us telling someone about O2+ power requirements or vi is at the center of 'evil'. Dig?

take care!!
Bill

@crispyoz @Scruffy I'll second that as many, many people have been bitten by the current surge required as the WiFi modem comes on line. Capacitance across and near the power/gnd is a good thing and long wires add series inductance which is a bad thing.

Just beware that vi is at the center of 'evil'.

@bigdogsb Sorry to hear about your issues. I've had great success with the products and have them in projects for revenue.

Which dock(s) are you using?

Have you put a terminal on tty1 to see what the console says at boot time?

Do you have adequate power? This has been a big gotcha for many, many users. There's a big surge in current consumption as the WiFi modem comes up. That surge must be met or the device will not complete boot up.

--Bill

@arianmares I've taken delivery of many units from them and have been very pleased with service. @Lazar-Demin is fairly active on this forum. He can direct you to the most effective path for the service you need.

--Bill

@crispyoz I don't.

@Radek Another thing that would concern me is the undocumented function of the "power on" pin. If it is merely an actuator input, you're probably cool. If it's actually a power input pin the O2 would be unable to provide adequate current.

@Lazar-Demin Outstanding update!

--Bill

@David-Kerr Awesome report!!

--Bill

@David-Kerr OMG!! Definitely one of those things you can never forget, no matter how hard you try! The "...I was confined to HQ with a drawing board..." just made me bust out laughing! We are indeed brethren in causes of industrial disasters!

Television the next day.....OMG!

So, @CAP-33, see what havoc we can create when we're trying to do the right thing? Just imagine if we didn't care...... 8^o

--Bill

@crispyoz I see it's 15 minutes later and I'm still laughing! However one part of my brain asked if this would be $100k USD or $100k AUD.....and that also cracked me up even more!

Anyone else want in? As you can tell by our stories, magic smoke escape is a serious problem. If you're experienced at blowing stuff up you might be just the kind of person we need on the team!

--Bill

@crispyoz LOL....really LOL! I am really laughing! You are brilliant!

--Bill

Ultimate magic smoke (UMS) story: The summer prior to my senior year in college I was in a salaried position as Student Engineer at Inland Steel in the No.1 Electric Arc Furnace and Billet Caster (a continuous caster). The prior summer, the 1F cap story, worked in the No. 3 Basic Oxygen Furnace and Slab Caster, the number 1 steel making shop in the world, not just then but also now.

Do a web search on continuous casters and find some YouTube videos if you can. They are fascinating....and potentially dangerous as you're about to find out when a 21 year old has control system schematics and a pencil.

The continuous caster control system was in a room perhaps 15m by 10m with most walls covered by enclosed racks of equipment including a bajillion relays. The schematics are a mess, outdated and staff members were concerned about using them and erroneously "fixing" something resulting in a disaster. My job was to red-line the schematics to bring them up to date. So, I have schematics, a pencil, and a multimeter and I'm in the caster control room. There's a door at both ends of the room with the caster, in operation, only about 2 to 3m beyond one of them. I get to work.....with the caster in operation. What could possibly go wrong here?

I'm frustrated, but need to make progress. I think one circuit could be validated if I close this one relay and I'd see just this one other relay flop in an adjacent panel (can anyone guess where this is going?). So I have both panel doors open and find both relays. Using my pencil eraser I close the target relay while keeping an eye on the other.. Then it seemed like there were several hundred relay closures in the room all around me....and it kept on happening!!!! Then a siren alarm sounded....then I looked at the door at the caster end where a red light was flashing.....then I saw molten steel bouncing off of everything.....then I saw two guy run by the door apparently trying to save their lives....then I saw more molten steel fly around all over the place. Oh...my....I just caused a breakout....a phenomenon created when the caster is sped up such that the steel can't form a cooled shell before leaving the mold, so the internal molten contents started spilling onto the floor. Damn! My 21 year old frustration almost got people killed!!!

So, I didn't let the magic smoke out, but I made a very, very big error! There was some water around and some oil & grease, so there was some smoke and a whole bunch of steam. I'll never forget that and it was in 1980!!

Here's the punch line, and it is crazy. After a few weeks I admitted to my boss that I thought I caused the breakout and explained to him in graphic detail. His response to me? "You know what, Bill? We consider you a virgin until you destroy at least $50,000 worth of equipment." Feel free to jump on-line and find one of those inflation calculation tools to see what 1980's $50,000 USD is worth today. You will be stunned!

There's my best magic smoke story, and I was still a student at the time.

take care all!
Bill