Gateway主动向客户端发消息的字符串转十六进制出错

        $c = "55AA0405000403500A00a3";//55 AA 04 05 00 04 03 50 0A 00 a3

        Gateway::sendToAll(pack("H*","55AA0405000403500A00A3"));

Gateway::sendToAll(hex2bin("55AA0405000403500A00A3"));