Hi there,
and welcome to the forum.
Looks like it needs to be the browan image for that concentrator to work, This is a IOTMiner yes?
At first blush I would say the Json conf is not complete or incorrect for older device?
also doesn’t look like the gps is working?
GPS I2C path is configured to “/dev/i2c-1” , Hmmm is this correct? <
My .02
HTH
GL 
PJ