AMT_Miners:

Can you tell me what this error message means?

root@raspberrypi:/var/www# cat ./cgminer.log
 [2014-08-23 03:37:32] Started cgminer 3.9.3                   
 [2014-08-23 03:37:32] Run Reset=0                   
 [2014-08-23 03:37:32] SPI Speed 4000 kHz                   
 [2014-08-23 03:37:32] ST MCU - Disable                   
 [2014-08-23 03:37:32] ASIC Difficulty =  256                   
 [2014-08-23 03:37:32] GPIO CS is OFF                   
 [2014-08-23 03:37:32] SPI '/dev/spidev0.0': mode=1, bits=8, speed=4000000                   
 [2014-08-23 03:37:38] Failure(cs0)(20): missing ACK for cmd 0x04                   
 [2014-08-23 03:37:38] ACK(cs0) timeout:cmd_RESET_BCAST-6.2967s                   
 [2014-08-23 03:37:38] No any A1 board 

Thanks,
perogi