Legacy Arf54 Module 868mhz Ug v7
Legacy Arf54 Module 868mhz Ug v7
Legacy Arf54 Module 868mhz Ug v7
User Guide
+33 (0)4 76 92 07 77
+33 (0)4 76 08 97 46
Ref. 08-07-V6-lmn
0B
Table of Contents
1B
Ref. 11-07-V7-ffr
p. 1
This guide describes the ARF54 devices, their options and accessories.
Ref. 11-07-V7-ffr
p. 2
Overview
4B
The ARF54 radio transceiver converts data from a serial link into a radio
frame to be sent to a similar piece of equipment. The communication is
half-duplex.
The operating parameters of these radio transceivers (serial link, radio
management) can be fully updated through AT commands via the serial
link.
Interface
5B
Mechanical specification
The transceiver is available in only one format: plugged module without
antenna.
Ref. 11-07-V7-ffr
p. 3
This module has been designed to be plugged (as describe above). If this
assembly doesnt suit your requirement, please have a look to Annex 1
(mainly for horizontal mounting).
Ref. 11-07-V7-ffr
p. 4
Signal description
Interface
Pin
Name
1
2
8
7
GND
VDD
TXD
RXD
/RTS
10
5
/RESET
PWD
GPIO1 /
PC0
GPIO2 /
PC1
GPIO3 /
PC2
GPIO4 /
PC3
GPIO5 /
PC4
GPIO6 /
PC5
GPIO7 /
PD5
GPIO8 /
ADC7
GND
I/O
Description
Alternate
function
Digital interface
16
13
14
11
12
9
6
15
17, 18
I
I
I/O
Ground
Operating voltage
Serial data transmission
Serial data reception
Request To Send
RTS = GND, the transceiver is able to
receive serial data
RTS = VDD, serial data received by
the transceiver are lost
Transceiver Hardware RESET, active LOW.
Power down management
Extended general purpose I/O
I/O
I/O
I/O
RS485
I/O
RS485
I/O
I/O
RS485
ADC
O
I
O
RS485
Ground
RF interface
19, 20
21, 22
23, 24
GND RF
RF
in/out
GND RF
Ref. 11-07-V7-ffr
RF antenna ground
RF antenna IN/OUT.
RF antenna ground.
p. 5
Vil1
Vih1
Vil2
Vih2
Description
Input low voltage except
/RESET
Input High voltage except
/RESET
/RESET Input low voltage
/RESET Input High voltage
/RESET pulse width
Min
-0.5
Max
0.3VDD
Unit
V
0.6VDD
VDD+0.5
-0.5
0.9VDD
2.5
0.2VDD
VDD+0.5
-
V
V
s
Ref. 11-07-V7-ffr
p. 6
CAUTION
215
Value
/ENABLE
485
(GPIO7)
GND
1
0
VDD
Input
Input
Input
Output
Note
RS485 control lines
management
RS232 configuration
RS232 configuration
GPI
O2
GPI
O4
GPI
O5
GPI
O7
Outp
ut
Input
Input
Outp
ut
Input
Input
Outp Input
ut
Input Input
Input Input
Ref. 11-07-V7-ffr
p. 7
TXD
n DATA bytes
Tde
Thold
DE/RE
Figure 2: DE/RE timing when data are sent over the serial link
U
S219
Tde
min
0
15
s
RXD
Thold : minimum = 1 s
Tde : set according to the S219 register value (see table
hereafter)
1
35
s
2
65
s
3
135
s
4
150
s
5
190
s
10
330
s
20
600
s
40
1.1
ms
60
1.7
ms
80
2.3
ms
In command mode, when a reply is sent back (on the TXD line)
according to the following DE/RE timing :
CMD
TXD
REPLY
700 S
100s
100s
DE/RE
RXD
CMD
Figure 3: DE/RE timing when a reply is sent back on the TXD line
U
Ref. 11-07-V7-ffr
p. 8
Radio communication
Radio communication
869 MHz version
This modem has several channels over the 863-870 MHz Band that can be
selected using AT commands, distributed in Wide Band and Narrow Band.
6B
UH
Radio channels
869 MHz version
The Wide Band channel are selected according to the following table:
7B
Channel
S200
1
Frequency
(MHz)
869,525
Ref. 11-07-V7-ffr
p. 9
Frequency
(MHz)
869,450
869,525
869,600
Channel adjustment
The S200 register allows choosing the desired channel and the associated
radio rate (see chapter AT commands )
HU
UH
Channel rejection
The graph below shows the typical channels rejection in WideBand (WB) and
NarrowBand (NB) modes.
Ref. 11-07-V7-ffr
p. 10
80
70
rejection (dB)
60
50
40
WB
30
NB
20
10
-2000 -1750 -1500 -1250 -1000 -750
-500
-250
250
500
750
1000 1250
RSSI reading
The RSSI (Received Strength Signal Indicator) gives an indication for the
received power level.
It could be accessed with AT commands (ATS230?<cr> command).
The RSSI level is only an indication. Use this level with care due to
the dispersion between components.
The operating temperature could also have an impact on these
dispersions.
The RSSI level could also indicate the potential presence of any
jammer in the used channel.
The RSSI is a necessary but not sufficient condition to
obtain a correct reception.
Ref. 11-07-V7-ffr
p. 11
Command mode
The command mode is used to read and update the modem configuration
registers using AT command.
NOTE
The AT command can be locked using ATPWD command.
In command mode, the radio is inhibited (reception and transmission),
excepted when using test command.
Entering command mode : issues on the serial link a +++ sequence. The
sequence of 3 consecutive + characters is accepted only if no character have
been seen before and after the +++ sequence. Register (S214) defines the
silence duration.
Tips 1: if you are using a terminal (such as Hyperterm), you have to send
the +++ sequence using a text file (first create a text file containing only the
+++ characters, and then use in Hyperterm the command Send text file in
the Transfer menu)
Tips 2:
Idle line for S214
duration
RXD
line
+++ (consecutive)
+
TRANSCEIVER MODE
Ref. 11-07-V7-ffr
COMMAND
MODE
p. 12
Transceiver mode
In transceiver mode, two protocols are available:
1. Transparent mode, without flow control.
2. Addressed mode, with flow control (see register S216)
TXD
(from
RF link)
CMD
RXD
REPLY
Minimum 100s
All the data received on the serial link are encapsulated in a radio frame.
The radio frame format depends on the used protocol.
When acting as transceiver, the radio frame transmission always starts under
the following conditions :
Detection of a silence on the serial link (greater than S217) after the
reception of the latest character.
Or when the number of received characters from the serial link is higher or
equal to the maximum radio frame size (S218).
Ref. 11-07-V7-ffr
p. 13
Transparent mode
In transparent mode, the modem acts as a wire serial link. It means that
alternately, the modem sends on the radio the data received from the serial
link and sends on the serial link the data received from the radio.
The radio frame format is :
<Preamble><synchro>DATA <postambule>.
Preamble, synchronisation and postambule are used for the radio
reception.
Addressed mode
In transmission mode, data received on the serial link are sent on the radio
link with the following format :
Ref. 11-07-V7-ffr
p. 14
AT COMMANDS
Description
AT commands are interpreted only when the transceiver is in
Command mode.
Command : are used to read and update the modem parameters
Ref. 11-07-V7-ffr
p. 15
Set of commands
Commands
ATO
<silence>+++<silence>
ATSn?
ATSn=m
AT&W
AT/S
AT/V
ATR
ATPWD=m
Description
Operating mode selection
Return back to transceiver mode.
Command mode activation. The +++ sequence must be
preceded and followed by a calibrated silence (no other
character)
Registers management
Displays the Sn register content where n represents the
register number.
The response has the following format:
Sn=y<cr><lf>
Sets the Sn register value with m. n represents the register
number..
Saves the new register configuration in EEPROM. Each time
you switch on the modem, the EEPROM configuration will be
loaded in the modem registers.
Displays all register values. The response has the following
format:
Sxxx=y<cr><lf> for each register.
Software version display. The response has the following
format:
Adeunis RF Versatile Modem II 868 MHz 500mW
Vxx.yy<cr><lf>
Restore the register default values
m = pin code (register S205) : unlock all AT commands.
m = 0000 : set registers to default value and unlock all AT
commands.
Test modes
Pure Carrier (data=0) transmission using current channel.
The output of this mode is achieved by reception of any
character on the serial link.
ATT2
Pure Carrier (data=1) transmission using current channel.
The output of this mode is achieved by reception of any
character on the serial link.
ATT3-ATT6
Modulation using current channel. The output of this mode
is achieved by reception of any character on the serial link.
ATT3: 0.9 KHz modulation
ATT4: 3.6 KHz modulation
ATT5: 14.4 KHz modulation
ATT6: 28.8 KHz modulation
AT/S is not available for baud rate lower than 2400 bauds
ATT1
Ref. 11-07-V7-ffr
p. 16
Register description
The register value could be updated using the ATSn=m<cr> command and
displayed using ATSn?<cr> command.
At power-up, the previous transceiver configuration is restored from E2PROM
(non volatile) to RAM. The registers are located in RAM registers, any
modification is performed on RAM registers: To save current register
configurations, it is necessary to use the AT&W<cr> command (If not, the
updated parameters are lost in case of power shortage).
The registers are shared in 2 types: read only (R) or read/write (R/W)
Type
R/W
Register Function
S200
Description
Radio management
Channel number Radio channel for 869 MHz version :
1, Wide Band channel.
19, 84 or 85, Narrow Band channels.
Default
value
Note
When leaving factory, this product is set up in Narrow Band (channel 19) to optimize the range
R/W
S202
S204
Preamble
duration
R/W
S217
Ref. 11-07-V7-ffr
p. 17
Register Function
R/W
S218
Radio frame
length
S230
RSSI level
Description
Default
value
Size of the radio frame (from 1 up to 240).
128
When this size is reached:
1.
the transceiver sends a radio
frame
2.
The RTS signal is activated
(pull to VDD) only if the module is
operating in the addressed mode.
Displays the reception level of the latest
received message.
Response: S230=-xxx dBm<cr><lf> with
xxx decimal value
Note
None
S231
RF OUT level
R/W
S210
Baudrate
R/W
S211
Data length
R/W
S212
Parity
Ref. 11-07-V7-ffr
Serial link
Serial link rate in bits/s
0: 600
1: 1 200
2: 2 400
3: 4 800
4: 9 600
5: 19 200
6: 38 400
7: 57 600
1,2,
5
7 : 7 bits
8 : 8 bits
1 : none
2 : even
3 : odd
p. 18
Register Function
Description
Default
value
1
Note
R/W
S213
Stop bits
1 : 1 stop bit
2 : 2 stop bit
R/W
S214
Command
timeout
R/W
S215
Interface type
0 : RS232 only
1 : RS232 or RS485 (managed DE/RE
lines)
R/W
S216
Handshake
R/W
S219
RS485 delay
R/W
S220
Protocol
R/W
S252
Reception
address
From 0 up to FFFF
Used in addressed protocol only, for
filtering incoming frame
R/W
S256
Transmission
address
From 0 up to FFFF
Used in addressed protocol only, added to
out coming frame
R/W
S205
Pin code
R/W
S207
R/W
S232
Pin code
activation
Power
management
Miscellaneous
Pin code value
Value 0000 is not allowed
0 pin code disabled
1 pin code enabled
0 disable modes
1 immediately enter standby mode
2 enable low power down mode
1111
0
0
NOTE 1
when a serial speed change is requested, the S214 and S217 registers values
are automatically set to a value greater or equal than the duration of three
Ref. 11-07-V7-ffr
p. 19
UH
HU
rejection
NOTE 4
The preamble duration is linked to the current radio rate.
The preamble values are :
WB channel
(high radio rate)
NB channel
(low radio rate)
Default preamble
value
Minimum preamble
value
5 ms
4 ms
20 ms
10 ms
BE CAREFUL
Keep in mind reducing preamble duration below default value will reduce
transmission delay but generate possible frame error rate (up to 1 or
2/1000)!!!
Ref. 11-07-V7-ffr
p. 20
1.
2.
Entered
ATS232=1<cr>
Consumpt
ion
4 mA (2.5 mA typical, to be
refined)
30 A (To be refined)
Wake-up
time
< 100 s
5 ms
Ref. 11-07-V7-ffr
p. 21
Ref. 11-07-V7-ffr
p. 22
Specifications
868 / 870 MHz European version
Embedded protocol
Embedded profiles
Transceiver multi-modes
Transparent or Addressed
Programmable Frequency
Channelization
Programmable Radiated RF
power
Sensitivity
(wide
RSSI level
RF signal qualification
Operating voltage
TX / RX consumption (max)
700 mA / 35 mA
Operating temperature
-30C / +70C
Dimensions
42 x 20 x 4 mm
Standards compliance
References
ARF7429A : Plugged module without antenna
Ref. 11-07-V7-ffr
p. 23
Glossary
TBD
To Be Defined
NC
Not Connected
NU
Not Used
FHSS
FIFO
WB
Wide Band
NB
Narrow Band
p. 24
Updates
Pin code added
Document
V4
Updates
NB configuration when leaving factory, electrical specification
VIx/VOx
Pin code added (LMN)
V13
Ref. 11-07-V7-ffr
p. 25