ER400TRS

 The ER400TRS Easy-Radio 400 Transceiver is a complete sub-system that combines a high performance very low power RF transceiver, a microcontroller and a voltage regulator. (Figure 1) The microcontroller programmes the functions of the RF transceiver and provides the interface to the host system via a serial input/output. It also contains programmable EEPROM memory that holds configuration data for the various transceiveroperating modes. The microcontroller also relieves the host from the intensive demands of searching for signals within the noise, recovering the received data and transmitting data in a suitable format. A Received Signal Strength Indicator output can be optionally used to measure received signal levels. The module connects to a 50-Ohm antenna such as a whip, helical or PCB loop.

The ER400TRS Serial Data Input and Serial Data Output operate at the standard 19,200 Baud and the two handshake lines provide optional flow control to and from the host. The Easy-Radio Transceiver can accept and transmit up to 192 bytes of data, which it buffers internally before transmitting in an efficient over-air code format.

Any other Easy-Radio Transceiver ER400TRS within range that 'hears' the transmission will decode the message and place the recovered data within a receive buffer that can then be unloaded to the receiving host for processing and interpretation. Transmission and reception are bi-directional half duplex i.e. transmit OR receive but not simultaneously.