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 Edited by relentless at 2017-12-18 18:50  
 
Everything might be.  
 
SD card problem is hardly expected, as I use high-speed Transcend card (one from the recommended list, and also already checked to be working with OPI 2G-IOT, although due to non-working WiFi driver that board was thrown till better times). 
Will check with higher amperage power supply. I remember USB power was not enough to make WiFi run on 2G-IOT, but even with my current adapter is was running ok. 
 
 
 
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