A total of four bluetooth module, a configuration for the host, three for the machine, when matching a transmitting data from the machine to start immediately after, match again during the second, three from the machine, but when I started to matching the third from the machine, the host send the AT command, no return parameter, and AT first, two from quote data also don't get on board, bluetooth host module is blocked? Or the at command and common data transceiver can't operate? Is there a big help me answer the