SMARTALPHA-433 rfsolutions.ltd, SMARTALPHA-433 Datasheet - Page 6

• Manufacturer Part Number: SMARTALPHA-433
• Description: Smartalpha Rf Transceiver
• Manufacturer: rfsolutions.ltd

S
ALPHA RF T
MART
RANSCEIVER
While the SmartALPHA is in configuration mode, then the module will send the current configuration
back to the host each time a data packet is received. To retrieve the current configuration without
changing any options the host can send a single byte to the module and wait for the response.
It is not necessary to send all configuration bytes to the module, but all data sent must be valid. For example to
change the destination address the host may just send four bytes. Configuration data excluded from the end of
the data stream will be unchanged. The SmartALPHA module will accept a short configuration after a 10ms
timeout after the last byte sent to the module, or when the RTS pin goes high. This allows for the host to easily
change the destination address of the RF data packet, thus enabling one SmartALPHA to send individual data
to several different recipient modules.
A destination address of 00000000 will reset the SmartALPHA to the default settings shown above.
RF data packets received by the SmartALPHA with the embedded destination address which matches the
SmartALPHA address will be accepted, processed and passed to the host, all of the RF data packets will be
ignored.
When configuring the destination or SmartALPHA address an incorrect number of bytes for an address will
leave the current address unchanged.
An invalid Transmitter Power or Packet Size setting will leave the current setting unchanged.
4.
Application Information
Connection of the SmartALPHA to an RS232 host terminal device such as a PC serial port may easily be
achieved using the Application Schematic at the back of this datasheet.
The 9 way ‘D’ socket (J1) provides the standard pinout required to connect directly to the serial port of any std
PC using a 9 way male/female cable. The MAX3232 (a low voltage RS232 line driver) provides level
conversion between the RS232 levels on the serial port and the logic levels pins of the
SmartALPHA
module.
If two such circuits are constructed then it will be possible to interconnect two PC’s and test out the
performance of the SMARTALPHA. When both circuits are powered up it will be necessary for them to have
each others address in the “Destination Address” register.
Page 6
DSSMARTALPHA-2e.doc
©2009 REG No 277 4001, ENGLAND.