AUREL RTX-24EM User manual

DEMO RTX-24EM
User guide
The technical characteristics can change without notice. AUR°EL S.p.A doesn’t assume the responsibility to the damages caused by an
improper use of the de ice.
AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY Re . B - 19.11.2019
Tel.: [phone] – Fax: [phone] Page 1 a 7
http://www.aurel.it - email: aur[email protected]t
Figure 1
Contents
1. Overview .................................................................................................................................................... 2
2. Menu .............................................................................................................................................. 2
2.1 Spectrum Analyzer ............................................................................................................................. 2
2.2 Packet Sender .................................................................................................................................... 4
2.3 Remote Control Ma ter/Slave ........................................................................................................... 5
2.3.1 Ma ter/Slave characteri tic ......................................................................................................... 5
2.3.2 Ma ter/Slave di play function ..................................................................................................... 6
3. Revi ion Hi tory ......................................................................................................................................... 7

DEMO RTX-24EM
User guide
The technical characteristics can change without notice. AUR°EL S.p.A doesn’t assume the responsibility to the damages caused by an
improper use of the de ice.
AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY Re . B - 19.11.2019
Tel.: [phone] – Fax: [phone] Page 2 a 7
http://www.aurel.it - email: aur[email protected]t
1. Overview
The board u e two 1.5V AA batterie . In order to let the di play working properly the battery level hall be
greater than 2.2V, ideally between 2.4V and 3V.
The battery level i alway hown on the bottom left at the power on menu, ee Figure 2.
In ert the radio module in hi ocket with the PCB component ide facing out a hown in Figure 1.
The DEMO RTX-24EM i available in the following variant :
Aurel Code
Technical name reference
Description
650201525
G
AUREL DEMO RTX
-
24EM
D
emo for
module RTX
-
24EM
-
AI/V
2. Menu
At power on, the di play will how the following initial menu:
Figure 2
Pre ing the button MENU permit to enter in the different topic available. Then, the button SELECT to
navigate between topic .
2.1 Spectrum Anal zer
By electing the Spectrum Analyzer mode it weep the RTX-24EM module’ frequencie eparated by 20
channel defined between 2401.5 MHz to 2477.5 MHz. The corre ponding RSSI i graphically di played a
per Figure 3. The button MENU and SELECT change the refre hing time from 0 to 9; “9” mean max hold
mode.
Pre ing both MENU and SELECT witche to a Continuou Stream Mode hown in Figure 4. In thi mode,
the module i con tantly ending random data with a 72kbp bit rate and the maximum RF tran mi ion
power (+9dBm). The tran mitting channel number i hown in the upper right corner.

DEMO RTX-24EM
User guide
The technical characteristics can change without notice. AUR°EL S.p.A doesn’t assume the responsibility to the damages caused by an
improper use of the de ice.
AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY Re . B - 19.11.2019
Tel.: [phone] – Fax: [phone] Page 3 a 7
http://www.aurel.it - email: aur[email protected]t
Figure 3
Figure 4
The tran mi ion channel can be increa ed or decrea ed (with the button SELECT and MENU) between 0
and 19 corre ponding to the frequencie hown in
Table 1. Pre ing again both MENU and SELECT together witche back to the Spectrum Analyzer Mode.
CHANNEL
FREQUENCY [MHz]
0
2401.5
1
2405.5
2
2409.5
3
2413.5
4
2417.5
5
2421.5
6
2425.5
7
2429.5
8
2433.5
9
2437.5
10
2441.5
11
2445.5
12
2449.5
13
2453.5
14
2457.5
15
2461.5
16
2465.5
17
2469.5
18
2473.5
19
2477.
5
Table 1 : Channels and Frequencies

DEMO RTX-24EM
User guide
The technical characteristics can change without notice. AUR°EL S.p.A doesn’t assume the responsibility to the damages caused by an
improper use of the de ice.
AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY Re . B - 19.11.2019
Tel.: [phone] – Fax: [phone] Page 4 a 7
http://www.aurel.it - email: aur[email protected]t
2.2 Packet Sender
Thi application permit to tran fer mall data packet between two demo , one et in Ma ter Mode and
the other one in Slave Mode. The tran mi ion i done from ma ter to lave, the payload ize i fixed at 4
byte :
•Byte 0: 0x00
•Byte 1: Counter Value MSB
•Byte 2: Counter Value LSB
•Byte 3: CRC Value
The RF tran mi ion power i et to the maximum value (+9dBm).The lave module wait an incoming
packet from the Ma ter and it an wer with an acknowledgment packet. An example of the di play i
hown in Figure 5.
Figure 5 : Packet Sender displa
Pre ing the button SELECT move the cur or in all the parameter available uch a :
•Mode : witch between high en itivity (HS) and normal en itivity (NS).
•Slave/Ma ter : witch between the two mode .
The lave module wait 200 m of timeout. When it receive a packet, the
CRC i calculated and a 4 byte acknowledgement i ent to the Ma ter.
The ma ter module continuou ly tran mit 4 byte of data every 200 m of
time interval.
•B_rate : Select the available bit rate ,
1.5 – 3 – 6 – 12 kbp in high en itivity mode (HS).
1.5 – 3 – 6 – 12 – 24 – 48 – 72 kbp in normal en itivity mode (NS).
•Freq : Switch between the different channel a indicated in the
•Table 1.
An auto-calibration i performed each time that thi parameter i changed.
•TOT,MIS,CRC : TOT i increa ed for every packet received,
MIS count the timeout triggered without a packet received,
CRC count the bit error in the packet received.
•RSSI : Thi number how the received ignal trength.
It’ in logarithmic cale, from 0 to 9.

DEMO RTX-24EM
User guide
The technical characteristics can change without notice. AUR°EL S.p.A doesn’t assume the responsibility to the damages caused by an
improper use of the de ice.
AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY Re . B - 19.11.2019
Tel.: [phone] – Fax: [phone] Page 5 a 7
http://www.aurel.it - email: aur[email protected]t
• Corr : Amount of frequency correction provided during the reception (HS only).
It pan between -127 and +127. Each tep i 790 Hz.
2.3 Remote Control Master/Slave
2.3.1 Master/Slave characteristics
Two board implemented a Remote Ctrl Master and Remote Ctrl Slave communicate with a 1.5kbp in high
en itivity mode (HS) and the maximum RF tran mi ion power (+9dBm). The tran mi ion i redundant in
order to have the highe t probability of ucce . The payload ize i fixed at 1 byte, the fir t half i the data
and the econd half i computed u ing a Cyclic Redundancy Check (CRC), ee Table 2.
Bi
nar code
Hexadecimal code
CRC full b te
0000
0 for OFF
0F
0001
1 for ON
1E
1010
A for ASK
A5
Table 2
In order to cover the full ISM 2.4 GHz band, three hopping frequencie have been elected:
•Channel 0 : 2401.5 MHz
•Channel 10 : 2441.5 MHz
•Channel 19 : 2477.5 MHz
The hopping rate ha been et at 190m for the Ma ter and 500m for the lave. It can be optimized in
function of the particular application and environment.

DEMO RTX-24EM
User guide
The technical characteristics can change without notice. AUR°EL S.p.A doesn’t assume the responsibility to the damages caused by an
improper use of the de ice.
AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY Re . B - 19.11.2019
Tel.: [phone] – Fax: [phone] Page 6 a 7
http://www.aurel.it - email: aur[email protected]t
Figure 6 Timing diagram of the frequenc hopping protocol
The Slave module hop regularly and it i alway li tening. When it receive a packet from the Ma ter with a
correct CRC, it end back an an wer on the ame channel. If the Ma ter receive a packet with a correct
CRC, it di play the tatu received and di able the tran ceiver. Otherwi e, the Ma ter continue to
tran mit the ame packet following it own frequency hopping cheme until the timeout of 5 econd .
2.3.2 Master/Slave displa functions
Figure 7 ON and OFF status of the slave module
Thi application permit to remote control a lave board u ing a ma ter board. The command are
implified in order to focu on the en itivity of the tran ceiver and it communication protocol.
From ma ter ide it’ po ible to interact with the lave with three imple command :
•A k the tatu : the lave will an wer if it’ in ON or OFF tatu
•Turn ON : thi command will witch the lave module in “on status”
•Turn OFF : thi command will witch the lave module in “off status”
Moreover, on the top, the di play how different working frequencie (2401.5 – 2441.5 – 2477.5 MHz) on
which the lave i permanently hopping and li tening for command from the ma ter.

DEMO RTX-24EM
User guide
The technical characteristics can change without notice. AUR°EL S.p.A doesn’t assume the responsibility to the damages caused by an
improper use of the de ice.
AUR°EL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY Re . B - 19.11.2019
Tel.: [phone] – Fax: [phone] Page 7 a 7
http://www.aurel.it - email: aur[email protected]t
Pre ing the MENU button on the lave it will change it tatu (ON or OFF) without a notification to the
ma ter.
The ma ter module how the working frequencie (2401.5 – 2441.5 – 2477.5 MHz) and the number of
received packet .
Pre ing the SELECT button permit to witch between different command . If the button MENU i pre ed
the elected command i activated.
Each command ha an hexadecimal byte u ed a identifier, a per Table 3.
Hexadecimal ID
Meaning
From Master
From Slave
0x0F
Turn OFF the lave
Slave i OFF
0x1E
Turn ON the lave
Slave i ON
0xA5
A k the tatu of the Slave
*** not u ed ***
Table 3 : Packets meaning
ICON
STATUS
NOTE
OFF
The ma ter ha received the information that the Slave
i OFF.
ON
The ma ter ha received the information that the Slave
i ON.
The Ma ter i ending a command to the Slave
in each
frequency, till it receive a re pon e.
If the Ma ter doe n’t receive a packet after 5 econd
.
At tartup or when a meaningle packet ha been
received.
Table 4 : Icon displa ed on master side
3. Revision Histor
Date
Description
Revision
13/11/2018 Preliminary A
19/11/2019 Fir t Relea e B