I know whats wrong... It happened to me but i forgot.
Shutdown sandor cgminer.
Uninstall zadig from device manager under Ports com & lpt.
Now download and install this driver to your OS. install the 32bit if your OS is 32bit, install 64bit if your OS is 64bit.
Get rid of zadig as I mentioned prior.
Install
https://www.dropbox.com/s/cys6f7xh7kh1y6i/stsw-stm32102%20%281%29.zip?m=After you install this driver
your com port under device manager should look like this.

Fireup sandor111 cpuminer with
{
"gc3355-detect" : true,
"gc3355-freq" : [
"8D9117765449:850:0", "8D9117765449:850:1", "8D9117765449:850:2", "8D9117765449:850:3", "8D9117765449:850:4"
"8D76576C5355:850:0", "8D76576C5355:850:1", "8D76576C5355:850:2", "8D76576C5355:850:3", "8D76576C5355:850:4"
],
"gc3355-autotune" : true,
"pools" : [
{
"url" : "stratum+tcp://us-east.multipool.us:7777",
"user" : "brandonb01.1",
"pass" : "x"
},
{
"url" : "stratum+tcp://doge.ghash.io:3333",
"user" : "user",
"pass" : "x"
}
],
"freq" : "850",
"debug" : true,
"log" : "log.txt"
}
With this as your start.bat inside it
minerd-gc3355.exe -c config.json
pause
How do I specify which device to use? I would like to point one gridseed to one pool, and the other gridseed elsewhere