Newly assembled System Blue problems

[bogdan]

Hi all,

I received my System Blue kit earlier this week and I assembled it today. However, upon supplying power to the unit I hear some repeating beeps from the buzzer and I cannot access the web interface. I tried re-flash the firmware using DfuSe and although the procedure went smoothly, the behaviour is still the same.

In the interest of clarity, I made a short video:

https://youtu.be/nS3QS4GNlYc

In the video the board was powered by my laptop and the network cable was connected directly to the laptop. As you can see in the video, trying to ping 192.168.1.235 (which I understand is the default when no DHCP server is available to issue an IP address) failed and the LAN connection briefly becomes active before showing "Network cable unplugged" again.

Any advice?

Thanks!

Bogdan

[DelandeC]

And when it is connected to a router with DHCP??

[bogdan]

And when it is connected to a router with DHCP??

It behaves exactly the same.

[malyan]

Are all the elements installed correctly? Soldering contacts are reliable?

[kevinmcc]

Is the network cable directly connected to the PC? You probably will need a crossover cable for that.

[opadavis2]

Can your laptop provide the current required by the board? The assembly instructions say that 1.0 A may be needed.
I am close to powering up my board for the first time so I am keeping an eye on these posts.
Peter

[bogdan]

A little more information:

I first powered on the board using a 1A power adapter and connected it to a router with DHCP enabled. The result was the same as you saw in the video. I only connected the board to the computer afterwards, in order to do the firmware flashing and since the result was the same, I just shot the video then and there. The network cable connecting the board and the laptop is cross-over. I also just checked all the solder joints with a magnifying glass and they all look OK.

Is there a circuit diagram for System Blue available? Also, is there any way to obtain a debug log?

[allsorts]

It looks like it's trying to boot but failing and entering a reboot loop. I don't think it's normal for the blue GPS led to start brighter than the others on power up and drop in level a few seconds later. It's difficult to tell but it also looks like it rebrightens a bit just before the two green and blue LEDs go off and the long beep happens. The status LEDs are all fed from pins on the CPU via current limiting resistors so any variation in brightness indicates that the associated pin is not static at "0" or "1" but is switching rapidly between the two states.

Most of the components you have to solder in only fit in one place on the PCB, an exception being the two crystals. Have got those in the right places? The 25 MHz one near the ethernet chip and the 8 MHz one near the CPU. Failing that have a very close inspection (on both sides of the board) in the region of the CPU for solder bridges, badly flowed joints etc.

[bogdan]

Most of the components you have to solder in only fit in one place on the PCB, an exception being the two crystals. Have got those in the right places? The 25 MHz one near the ethernet chip and the 8 MHz one near the CPU. Failing that have a very close inspection (on both sides of the board) in the region of the CPU for solder bridges, badly flowed joints etc.

Yes, the crystals are in the right places. And I just checked the CPU under a magnifying glass but I didn't notice anything out of the ordinary.

https://www.dropbox.com/s/1ks6tg8esz22sk...3.JPG?dl=0

[kevinmcc]

Looking at the soldier joints, some appear to have a lot of solder that flowed through the via, others do not.

I would double check that the solder joints are making good connections and none are shorting.

Are you still using a 1A power supply?

You may want to try a bigger supply.

Had really good luck with this one.

https://www.powerstream.com/AC-1898.htm