have a issue could be usb cable which does both power and signal is defective I am dropping connection between auc and miner.
this is an example
psu issue it is now using a pair of bitmain apw3+ and works!
trying down clock with this setting
Minimum Fan%(Range: 0-100, Default: 10%) 30
More Options --avalon9-voltage-level -2
all other settings are stock
downclock results with first rasp pi are poor watts are about 2020 stock setting
I got watts to drop to 1800 but hash dropped more then it should of.
so say 2020 watts give 19th
or 1800 watts give 17th
basically shit gear on first attempt at down clocks.
I moved onto newer firmware will get back with numbers
stock was 2052 watts and 20 th on new rasp pi
first down clock used
--avalon9-voltage-level -1
watts dropped to 1932 will get back with a hash number
20.5 th so far so newer rasp pi seems better
1932/20500 = 94 watts a th not close to a m10 2400/34000 = 70.5 watts a th
but cheap 2 units = 790 plus psus say 1000 or 1100 for 40th
an m10 from li is 890 plus tax and shipping or 1200 for 34th