... RF Module, 5Km Wireless Data Transceiver: YS-C30 series data radio designed for Serial (UART data) to RF in industrial ... on ISM frequency band, half duplex integrated receiving and transmitting.Modules could directly connect with monolithic processors, PC, RS485 devices, ... level(>200millisecond), the module will be in sleep status, modules can not receive or transmit any data when sleep.Only ...