Microhard pDDL Carrier stopped working
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I have two Microhard pDDL Carrier USB Dongle (MDK-M0048-2-01), both set up the same way but one has stopped working during initial setup.
It was lighting up with all the LEDs on the board but after powering on and off it now only shows the 5v LED.
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Hi @gerard
Can you share a photo of the setup, ideally with the working unit next to the problematic one?A couple of possible causes come to mind, but we'd need a bit more information to narrow it down:
The modem module may not be fully seated in the socket. These modules can be difficult to install correctly, and if the thermal pad underneath shifted or lifted slightly during installation, it can prevent proper seating.
The socket may be cracked. It's fairly easy to damage the socket during module removal, especially with Microhard modules, which can lead to intermittent electrical connections.A side-by-side photo of the good and bad units would be very helpful for troubleshooting.
Thanks! -
@Vinny I have already tried swapping the boards over between the setups and have removed and reinstalled the modules with care to inspect for damage but have found none.
Both are just being bench tested with a 5v supply.
Without the module installed, would only the 5v led light up anyway? It seems like a the board needs a factory reset as nothing changed with the setup apart from a power cycle.
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Hi @gerard
Do you not get these LEDs either?
https://docs.modalai.com/microhard-usb-carrier/
Without a Microhard module installed, the 5V LED and the USB Hub LEDs should all still illuminate.
When the MH is properly configured, then you should start to see the other Activity and RSSI/Status LEDS. Those not appearing indicate the module is not configured, not seated, or in error.
Images will help.
Thanks! -
as you can see it has power as shown by the 5v LED but no other leds now light up?
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@Vinny any update?
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Hi @gerard
Your RPi needs power.
The USB on the Microhard Dongle is a Device/Peripheral Port, needs to connect to a Host PC/SBC.
I do not see any power input to your RPi device.
That can explain your behavior. -
@Vinny no the same still happens when the jeston computer is powered up.
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Hi @gerard
I asked my team for some extra assistance on the SW side, but if you suspect HW failure, we can diagnose with an RMA if you want to pursue that route.
If you had this working at one point, then it did not, it's most likely either a really bad SW change, or the HW got damaged.https://www.modalai.com/pages/rma
If you want to wait and see if our SW team has any guidance first before doing an RMA, that is your call.
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@gerard I also just remembered we had a stint of bad MCBL-00010's a few months ago...
We have since cleared that up, but there is no telling how long ago you may have ordered that cable...
Please see this thread for guidance and if you do think your MCBL-00010 is at fault, we will replace your M0048, just reference both threads in your RMA (this one and this one -->) https://forum.modalai.com/topic/4632/flight-core-2-firmware-update-through-qgc?_=1781284416780
