Version List

Transceiver module TRX433-10C2 / TRX868-10C2 (Vers. 1.0E) 12
Example for a continued radio data stream (radio telegram with more than 61 bytes payload)
A continued radio data stream (thus a telegram which isn’t limited to 61 bytes payload) can only be realized
with Fast send and without CRC16. Also, the RS232-baud rate has to be chosen at least as fast as the RF
data rate. With these configurations, a continued radio data stream like in figure 9 can be realized. It is also
apparent in Figure 9 how the CTS pin may prevent the transceiver module from outputting the data via
RS232 that it received via radio. Also you can see the number of bytes in the transmittion buffer (TX-BUF) of
the sending transceiver module and the numbers of bytes in the receiving buffer (RX-BUR) of the receiving
transceiver module.
module 1
module 2
bytes in TX-BUF
RS232, RTS-pin
RS232, RxD-pin
RF-transmission
RS232, TxD-pin
RS232, CTS-pin
bytes in RX-BUF
0.... 1.... 2.... 3.... 4.... 5.... 6.... 7.... 8.... 9....10...11...12...12...12...13...13...14...14...15...15...
Byte 1
Byte 2
Byte 3
Byte 4
32 Bit
Preamble
+2ms Startup
Byte 5
Byte 6
Byte 7
Byte 8
Byte 9
Byte 10
24 Bit
SYNC
Byte 11
Byte 12
Byte 13
Byte 1
Byte 14
Byte 15
Byte 2
Byte 16
Byte 17
Byte 3
Byte 18
Byte 19
Byte 4
Byte 20
... 0........................................................................................ 1....0....1....0.... 1....0....1....0... ....0....1....0....1....0....1..........2..........3...2.....2....1...2.1...0..1....0....1....0....1....0..
Figure 9 Dataflow with Fast send without CRC16, RS232-baud rate = 2x RF data rate
Byte 5
Byte 21
Byte 121
60...60...61. 60........59........ 58...59...59...60...60...61.60.... 59........58... 59...59...
Example for continued data stream over RS232
With Fast send enabled and CRC16 disabled, a continued data stream can be realized over the RS232interface.
For that, the RF data rate has to be chosen higher than the RS232-baud rate. In figure 10, a
continued data stream over RS232 is shown by which the RF data rate is adjusted twice as fast as the
RS232-baud rate. Further you can see how many bytes are stored in the transmittion buffer (TX-BUF) of the
sending transceiver module and in the receiving buffer (RX-BUF) of the receiving transceiver module.
module 1
module 2
bytes in TX-BUF
RS232, RTS-pin
RS232, RxD-pin
RF-transmission
RS232, TxD-pin
RS232, CTS-pin
bytes in RX-BUF
Byte 1
Byte 2
Byte 3
Byte 4
...0........... 1...........2...........3........ 2. . 3. 2...1..2.1...0....1...........2...........3......... 2.3..2....1.2...1...0..1...........2...........3..........4.3...2.... 2...1...0.1...........2...........3...........4..3...2..3. 2...
Byte 1
Byte 2
32 Bit
Preamble
+2ms
Startup
Byte 3
24 Bit
SYNC
Byte 4
Byte 1
Byte 5
Byte 2
Byte 3
Byte 4
Byte 5
Byte 1
Byte 6
Byte 7
Byte Byte 1 8
32 Bit
Preamble
+2ms
Startup
Byte Byte 1 9
24 Bit
SYNC
Byte Byte 1 10
...0....................................................... 1... 2...3.2..3...4..3.......... 2...........1.......... 0.1...2...3.2..3...4..3.......... 2...........1..........0.1...2...3.2..3...4..3.......... 2...........1...........0.1.... 2...
Byte 60
Byte Byte 1 11
Byte 6
Byte 7
Byte 8
Byte 9
Byte 10
Byte 61
Byte 122
Byte 123
Byte 61
Byte Byte 1 12
Byte 62
Byte 62
Byte 63
Byte Byte 1 13
32 Bit
Preamble
+2ms
Startup
Byte 64
Byte Byte 1 14
24 Bit
SYNC
Byte 124
Byte 65
Byte Byte 1 15
Byte 125
Byte 63
Byte 126
Byte 66
Byte 64
Byte 127
Byte Byte 1 16
Byte 11
Byte 12
Byte 13
Byte 14
Byte 15
Figure 10 Data stream with Fast send without CRC16, RF data rate = 2x RS232-baud rate
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte Byte 1 8
Byte Byte 1 9
Byte Byte 1 10
Byte Byte 1 11
Byte 65
Byte 128
Byte 67
Byte Byte 1 12
Byte 66
Byte Byte 1 17
Byte 67
Byte 68
Byte Byte 1 18
32 Bit
Preamble
+2ms
Startup
Byte Byte 1 13
Byte 68
Byte 69
Byte Byte 1 14
Byte 129
Byte 69
Byte Byte 1 19
Byte 70
24 Bit
SYNC
Byte 130
Byte Byte 1 15
Byte 70
Byte Byte 1 20
Byte 16
Byte 71
Byte 17
Byte 131 60
Byte 16
Byte 21
Byte 18