[Ovmsdev] Duktape heap memory management

Craig Leres leres at xse.com
Sun Sep 5 15:36:16 HKT 2021

On 9/4/21 6:45 PM, Craig Leres wrote:
> Something I can try without much effort is to swap in my spare SIM5380 
> modem, that might reveal some other issue with my setup.

I tried this and the sim5380 was able to register right away and I could 
see that it was active on the hologram.io dashboard. So I'm sure now 
that my antenna works at least to the u.fl pigtail.

I checked resistance between the center pin of the ant3 u.fl socket and 
the pin on sim5380 module and it was single digits M ohms. But I see now 
that both ant2 and ant3 on my sim7600 module are shorted to ground. So 
that's a problem.

I remember trying to move the u.fl socket from ant3 to ant2 and giving 
up and soldering new sockets in both locations. And I found the socket I 
removed. Comparing it to some unused new sockets (mouser 
712-CONUFL001-SMD) I see they this stupid tab that comes off of the 
grounded part of the connector. I thought all 4 sides of the old u.fl 
were soldered but looking at the old one I removed, I see now that only 
3 were and the 4th just had solder on the trace. Oops.

Well this should be an easy fix (assuming I haven't hurt the simcom -- 
but if so I have two new sim7600 and one sim7100 handy).

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