SMARTALPHA-433 rfsolutions.ltd, SMARTALPHA-433 Datasheet - Page 5

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

DSSMARTALPHA-2e.doc
3.
The configuration of the SmartALPHA module may be changed by placing the SmartALPHA in Configuration
mode, then sending a set of configuration data bytes to the module on the Tx pin.
To place the SmartALPHA in Configuration mode the user needs to send “+++” (three plus characters) within
the 10mS timeout for each character. The SmartALPHA responds be returning the Configuration data bytes.
The SmartALPHA is now on Configuration mode.
To exit Configuration mode the user needs to send “---“ (three minus characters) within the 10mS timeout for
each character. The SmartALPHA will not return a response. The SmartALPHA is now in data mode.
The RF Channel is calculated as:
433 MHz working frequency: Config value (decimal) = 4000*((fo/10)-43)MHz
868 MHz working frequency: Config value (decimal) = 4000*((fo/20)-43)MHz
915 MHz working frequency: Config value (decimal) = 4000*((fo/30)-30)MHz
Please Note, the calculated value must be converted into binary. The high byte is placed in byte 8 and
the low byte in byte 9. The Config value MUST be in the range 96 to 3903 (decimal). Both bytes must be
present for the channel to be accepted.
Byte
10
11
12
13
14
0
1
2
3
4
5
6
7
8
9
Configuration
RF transmission speed
SmartALPHA Address
RF Channel high byte
RF Channel low byte
Destination Address
Tx data packet size
Rx data packet size
RSSI threshold
Tx Power
Name
©2009 REG No 277 4001, ENGLAND.
S
MART
MSB
LSB
MSB
LSB
TX / RX Frequency
TX / RX Frequency
0 = 0 dBm
1 = -3 dBm
2 = -6 dBm
3 = -9 dBm
4 = -12 dBm
5 = -15 dBm
6 = -18 dBm
7 = -21 dBm
4 – 31 bytes
4 – 31 bytes
0 = -103dBm
1 = -97dBm
2 = -91 dBm
3 = -85 dBm
4 = -79 dBm
5 = -73 dBm
A3 hex = 1200 bps
91 hex = 2400 bps
47 hex = 4800 bps
23 hex = 9600 bps
11 hex = 19200 bps
ALPHA RF T
Description
RANSCEIVER
Page 5
7E hex
7E hex
7E hex
7E hex
7E hex
7E hex
7E hex
7E hex
06 hex (434.133Mhz)
75 hex (434.133Mhz)
0 (0 dBm)
30 bytes
30 bytes
A3 hex
Default Supplied Value