RTX-LONG-RANGE
Contents
1. EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 3 of 17 http www aurelwireless com email rfrcomm aurel it AUREL eh oe oD RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY J TX_RX SP1 In DIRECT MODE pin5 0 pin 7 Input for TX RX switching Connected as follow TX RX STATE 0 RX 1 TX X RX In PACKET MODE pin5 1 SP1 together with SP2 allow the selection of serial port speed UART Functionality not available yet the communication works only at 9600pbs SP1 e SP2 not working SP1 SP2 UART Data Rate Pin7 Pin8 bps 0 X 0 X 9600 0 X 1 19200 1 1 115200 1 1 Test mode non available Tab SP1 SP2 8 IN DATA SP2 In DIRECT MODE pin5 0 pin 8 Digital data input for DIRECT MODE transmission Connect at 0 or 1 with data rate 10 3000Hz In PACKET MODE pin5 1 SP1 together with SP2 allows to select serial port speed UART pin 13 14 For pin 8 settings SP2 please see above pin 7 SP1 in PACKET 9 OUT DATA Digital data output in DIRECT MODE This pin is active only in DIRECT MODE RX direct mode 10 GND Connection to ground plane The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the2. Rate 9600 Bps Note As input serial signal is intended 8 bit not parity 1 stop bit Note 2 Test achieved with the method described in 7 6 section of the normative ETSI EN 300 220 1 V2 4 1 Note 3 Test achieved with the method described in 8 3 section of the normative ETSI EN 300 220 1 V2 4 1 Note 4 Test achieved with the method described in 8 3 4 section of the normative ETSI EN 300 220 1 V2 4 1 Note 5 Test achieved with the method described in 8 4 section of the normative ETSI EN 300 220 1 V2 4 1 PIN OUT 38 1 45 Pin out a a 1 V_PA_LNA 2 ANTENNA 2 m 3 GND AUREL 4 NC No pin RTX LONG RANGE X 5 DM UART 869 MHZ 6 ENABLE DTX_RX SP1 ik 8 IN_DATA SP2 l l l l l l l l l i l l l l P 9 OUT DATA RX direct mode 15 10 GND 0 25 ps a 11 CNO RTS 12 CN1 CTS 13 CN2 TX_UART 14 PW_TX RX_UART 15 V_RD Picture 2 pin out of the module N Pin Name Description 1 V PA LNA Front end power supply Use a stable power source at 3 3V 1A Connect a electrolytic capacitor a 470 1000uF near GND PIN ANT Antenna connection 50 ohm impedance 3 GND Connection to ground plane DM UART I Digital input for choosing transmission mode Connected to 22 47K_ pull down DM UART STATE 0 Direct mode 1 Packet mode 6 ENABLE Starting up Pin Connected to 22 47K pull down PWRDN STATE 0 Off 1 On The technical features can change without forecasting AUR
3. assures the compliance with the above mentioned rule The transceiver must be operated from a very low voltage source safety protected against short circuits The usage of the transceiver is foreseen inside housings that assure the overcoming of the rule EN 61000 4 2 not directly applicable to the module itself In particular it is the user s care the insulation of the external antenna connection and antenna itself since the RF output of the receiver is not able to directly bear the electrostatic charges foreseen by the above mentioned rule CEPT 70 03 Recommendation The RTX_LONG RANGE 869MHz transceiver operates in a harmonized frequency band and therefore in order to comply with local regulations the device must be used on the time scale with maximum duty cycle time 10 equivalent to 6 to 60 minutes of usage The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 16 of 17 http www aurelwireless com email rfrcomm aurel it eee L E i RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Re
4. case characters that always The commands are codes that contain one or The command always end with lt CR gt proceed a command or register more characters Carriage Return Register Name Function Values R W S2 CHANNEL Working radio channel 0 869 45MHz R W 1 869 475MHz 2 869 5MHz default 3 869 525MHz 4 869 55MHz 5 869 575MHz 6 869 6MHz S3 POWER Output RF power 0 8 dBm R W 1 16dBm 2 22dBm 3 25dBm 4 27dBm default The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 9 of 17 http www aurelwireless com email rfrcomm aurel it AUREL RELESS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY S8 RADIO_SPEED 0 600bps R W 1 1200bps default 2 2400bps 3 9600bps S9 TEST_MODE TBD TBD S15 VERSION Firmware version Variable R Command Name Function WR WRITE Writing of the value in EEPROM registers CC COMMAND _ Output from Command Mode CLOSE Tab 2 commands Answers to the commands and to the operation on registers Positive answer OK lt CR gt lt LF gt Negative answer lt bI gt ERROR lt CR gt lt LF gt Forbidden operation lt bl gt NO ACCESS lt CR gt lt LF gt With lt CR gt Carriag
5. dBm 420 500 550 mA Power consumption stand by mode 8 10 uA Logic level 1 in input output 0 7x Vcc Vcc V Logic level 0 in input output 0 0 3xVcc V RF TX Frequency band 869 4 869 65 MHz TX Power direct mode Pin 14 1 25 27 29 dBm TX Power direct mode Pin 14 0 20 21 23 dBm TX Power packet mode 8 29 dBm Modulation type GFSK Frequency deviation 43 5 KHz Spurious lt 1GHz 36 dBm Spurious gt 1GHz 30 dBm Power on adjacent channel in TX see note2 50 nW RF RX Sensitivity direct mode 115 116 120 dBm IF Band 12 KHz RF Band 600 KHz Selectivity on adjacent channel note3 50 dB Saturation on adjacent channel note4 gt 87 dB Blocking test 2MHz note5 85 90 dB Blocking test 10MHz note5 85 94 dB Performance Serial Bit Rate 2400 4800 9600 bps Outdoor range 3000 m Channels 7 n Channelization 25 kHz Switching times PWRDN gt RX TBD ms TX gt RX 4 ms RX gt TX 3 5 ms Default settings only packet mode Channel CN3 869 5 MHz The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Tel 39 0546 941124 Fax 39 0546 941660 http www aurelwireless com email rfrcomm aurel it Rev 3 3 08 11 2013 Page 2 of 17 AUREL EULEKS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY Output power tx 27 dBm Serial Data
6. sequence from unit A to unit B packet 1 enters in unit A and it s transmitted to unit B that forwards it through the serial port The transmission of the packet 2 must be carried out keeping in mind that the end of the serial reception of unit A has to take place AFTER the end of the serial transmission of packet 1 by unit B so to avoid the overlapping of the RF reception and of the serial transmission phases in this device it is therefore necessary to enter a safety interval between the transmissions of the two packets in function of the number of byte of the first packet of The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 7 of 17 http www aurelwireless com email rfrcomm aurel it AUREL RELESS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY the serial speed of unit B and in function of the time required Tgr ms for the transmission of the packet on the RF which depends upon the number of bytes of the packet and it is given by Tgr ms K 22 N pvr with K TBD 9600bps K TBD 4800bps K TBD 2400bps The last byte of the second packet must enter unit A after unit B has ended the serial transmission of the first packet Treen Napas t s The 2 packet does not enter in A unit du
7. RT pin 14 To enter in Command Mode from PACKET MODE it is necessary to send on the TX_UART pin 13 a sequence of 3 consecutive ASCII characters i e A module under Command Mode state is unable to the RF reception and transmission At this purpose we recommend using the RS232 port or USB port of a PC physically interfaced to the radio module to get logic levels 0 3V connect the RX and TX signals leaving disconnected RTS and CTS non implemented Use a program to communicate with the serial port Hyperteminal RealTerm or other similar setting the following parameters communication speed established by SP1 and SP2 9600 19200 115200 a START bit 8 data bits and a STOP bit no parity select CR and LF Try sending from PC if you will get OK then the communication is correct Type ATCC you will get good response in confirming the exit from Command Mode Available Registers and Commands The commands that can be sent to the module regard the reading and writing of the registers containing the operation setting of the device The reading and writing of the configuration registers and the sending of the commands to the module are carried out by entering the AT sequence Standards used in PSTN modem before the command s or register s name Below is listed the available commands for their usage follows the writing and reading examples of the registers AT COMMAND lt CR gt Upper
8. age regulator it s recommended the choice of models with characteristic of fast transient response following it s suggested a schema tested by Aurel suitable for the module RTX LONG RANGE REGLO4GA A ae gt a GND bo a ay 2 i 3V3_PA 3v3 Picture 6 Fixed power supply 3V 1A DC DC Device usage In order to obtain the performances described in the technical specifications and to comply with the operating conditions which characterize the Certification the transmitter should be mounted on a printed circuit taking into account the following Voltage Supply 1 The transmitter must be supplied from very low voltage safety source protected against the printed circuits Maximum voltage variations allowed 2 1 3 6 V The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 14 of 17 http www aurelwireless com email fcomm aurel it AUREL RELESS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY However it is preferable to maintain a stable voltage to a predetermined value in the range of voltage as specified above using a voltage regulator Fast transient response see paragraph power supply 2 Decoupling next to the transmitter with a ceramic ca
9. dBm This setting allows you to return to the power limits shown in Table 5 by the normative EN 300220 1 paragraph 7 2 3 PW_TX STATO pin14 1 RF output Power max Power 27dBm 0 X RF output Power 21dBm In packet mode pin5 1 pin 11 RTS pin12 CTS pin13 TX_UART pinl4 RX_UART allow connection to a serial port for data exchange and the programming of some internal registers using AT commands PIN Description PIN14_RX_UART Serial data output in TTL RS 232 logic with start bit 1 OV 8 data bits and 1 stop bit 3V The line must be driven to a high logic level 3V 15 V RD Radio digital circuit power supply Use a stable power source at 3 3V 100mA Connect a electrolytic capacitor 10 100uF near GND PIN Tab 1 PIN description The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 5 of 17 http www aurelwireless com email rfrcomm aurel it AUREL RELESS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY Operating mode The device s operating modes can be summarized in 5 conditions 1 Test Mode 2 DIRECT MODE 3 PACKET MODE 4 Power Down Mode 5 Command Mode 1 Test Mode The Test Mode can be reached by
10. device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 39 0546 941124 Fax 39 0546 941660 Tel Rev 3 3 08 11 2013 Page 4 of 17 http www aurelwireless com email rfrcomm aurel it AUREL eh aie RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY 11 CNO RTS In DIRECT MODE pin5 0 pin 11 CNO pin 12 CN1 pin13 CN2 allows to modify frequency 12 CN1 CTS channel selection 13 CN2 TX_UART DIRECT MODE pin5 0 RF Channel CN1 CN2 CN3 CN4 CN5 CN6 CN7 Frequency 869 45 869 475 869 5 869 525 869 550 869 575 869 6 MHz PIN11_CNO 0 X 1 0 X 1 0 X 1 0 X PN12_CN1 0 X 0 X 1 1 0 X 0 X 1 PIN13_CN2 0 X 0 X 0 X 0 X 1 1 1 0 GND 1 Vcc X open Note Pins 11 12 13 14 when left open are internally connected to GND with 22K resistance In PACKET MODE pin5 1 pin 11 RTS pin12 CTS pin13 TX_UART pin14 RX_UART allow the connection to a serial port for data Exchange and the programming of some registers through AT commands PIN Description PIN11_RTS TBD PN12_CTS TBD PIN13_RX_UART Serial data output in TTL RS 232 logic with 1 start bit OV 8 data bit and1 stop bit 3V The line must be driven at high logic level 3V 14 PW TX In direct mode pin 5 0 the pin 14 allows to change the RF power transmission of approximately 6 RX U ART dBm This setting is useful when connected to external antenna and gain of 6 8
11. e Return ASCII 13 character lt LF gt Line Feed ASCII 10 character lt bl gt ASCII 32 character Reading of a Register Syntax ATSx lt CR gt lt LF gt x 1 16 Register to be read Answer the value contained in the register if the command has been given correctly It s followed by lt CR gt lt LF gt The value of registers is returned digit by digit in ASCII value Example 16 is the series of ASCII 0x31 0x36 codes corresponding to 1 e 6 digits It must follow this procedure of interpretation even in the case of writing the value of a register Writing of a register Syntax ATSx Y lt CR gt lt LF gt x 2 3 4 register to write y value to insert The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 10 of 17 http www aurelwireless com email rfrcomm aurel it AUREL RELESS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY Answer as described Risposte ai comandi Answer to the commands All programmed values in the registers cause a change in the operating conditions of the module that will be lost when it s powered off unless they have been stored in the EEPROM of the microcontroller with the appropriate command ATWR in this case the chan
12. eee L E l RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY 38 1 s 45 AUREI i RTX LONG RANGE 869 MHZ ve TIT rrr A T 0 5 2 54 0 25 RTX LONG RANGE 869MHz radio transceiver half duplex offers improved performance as such as longer RF range up to 3Km operates in European band 869 4 869 65MHz free licensed with no government taxes The high sensitivity level 118dBm joined with its typical ERP 27dBm can assure a budget link around 145dB improving communication distance of 4 5 times better compared with traditional 10mW LPD devices It operates in 2 different modes DIRECT MODE with modulation and demodulation of proper data protocol or PACKET MODE selectable via UART through AT commands same as a radio modem 7 channels available selectable depending on transmission speed GFSK modulation Blocking immunity performance are compliant with Class 1 optimum rejection to the disturbances in the adjacent channels In order to assure a battery power supply the module has been designed for 3 3V supply perfect for SCADA application and its current consumption is around 600mA at maximum power emission and uA in stand by mode Thanks to its tiny overall dimensions it can be fitted vertically on application circuit with dimensions similar to the Aurel standard receivers 38 1mm length x 24mm high x 4 5mm top layer is protected with metallic shield with the purpose to obtain the European standard approvals Features Ap
13. f the UART interface the transmission and reception signals and the settings of the radio module are obtained through the communication input asynchronous serial interface output The controls for the serial CTS and RTS are not implemented yet and therefore together with pin9 out date DM will not be connected The module always operates in receive mode the switching from reception to transmit part is automatically activated when the first byte of data enters the hall 14 RX_UART 3V3_PA RTX_LONG_RANGE_869 65PR01915 vl 5 220uF oe i EY TE n E 2 2 Anuga bE bg me Eeececereceee ANTENNA IN i ors 2333233 Q 500hm J1 81 c5 100nF uC UART INTERFACE FT232 MAX3232 Picture 5 Packet Mode Electrical schema The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 13 of 17 http www aurelwireless com email fcomm aurel it AUREL RELESS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY Power supply The transceiver in the transmission phase can absorb current peaks of up to 600mA It s necessary to use a power supply system that maintains stable and clean voltage supply in the fast transient current In case it s requested to use a volt
14. f the transmitting part in applications where you need an external antenna with a gain of 6 8dBm The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 11 of 17 http www aurelwireless com email rfrcomm aurel it eee L E l RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY 3V3_PA RTX_LONG_RANGE_ amp 69 6SPRO1915 a w HERI THRE j ei Beak eB ee Be wpelrela Sl aalaaa GND GND pn Lo T sf le TX RX t TX DM co_ _ 100pr _ avs i Yooper p coH oe l CoO o e a co PW_TX 4 c11 s2 100pF ____ _ c1 100pF Picture 4 Direct Mode electrical schematic PACKET MODE schema The connection of the module for the operation in packet mode is extremely simple The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 12 of 17 http www aurelwireless com email fcomm aurel it sacii L E l RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY The dip switch S1 selects the speed o
15. ged values will be active also the next switching on Command for saving the value of the registers in EEPROM Syntax ATWR lt CR gt lt LF gt Answer as described Risposte ai comandi Answer to the commands Comando di uscita da Command Mode Syntax ATCC lt CR gt lt LF gt Answer as described Risposte ai comandi Answer to the commands The escape from Command Mode in absence of ATCC command occurs automatically after 5 seconds of inactivity DIRECT MODE schema The Direct Mode allows the transmission and reception of digital data from proprietary protocols The transmission is activated by carrying high the pin 7 TX RX and entering the data directly on the connector J8 TX similarly the received data are available on the J9 connector RX with pin TX RX is kept low The data must have a length in between 20ms and 350ms defined as the length of single bit high low However in order to avoid problems in the reconstruction of the signals to the demodulator we recommend the implementation of a protocol containing a preamble and data coded with Manchester or Miller or other similar techniques The modulation of pin8 with data from UART is not recommended The dip switches 1 3 of S2 select the radio channel or during the RX phase or after to the exchange RX gt TX or POWER_DOWN TX during the TX phase they are disabled The dip 4 of S2 decrease the power by 6 dBm for the purpose of the homologation o
16. ide specifically calculated for double sided epoxy glass 1 6 mm thick The pin 1 of the power supply connect the power supply with wide track and 2mm electrolytic capacitor 220uF restaurant nearby The pins of the input signals and output of the module are connected to the capacity from 22 to 100pF places in the vicinity of the same The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 15 of 17 http www aurelwireless com email rfrcomm aurel it AUEL WIRELESS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY Ss G fmd fod mh M TA Ain as o na oa o 0 0 Ye taht Fh eh eh ma A Picture 7 Example of lay out the connection tracks on PCB on the top side and ground plane in the button side Normative The RTX_LONG RANGE 869MHZ transceiver is compliant with the European normative EN 300 220 V2 4 1 2012 05 ed EN 301 489 3 V1 5 1 2012 07 Tests have been carried out through transmissions of Pseudo Code Random at 500 bps CEPT 70 03 The occupancy of bandwidth is verified been carried out through transmissions of Pseudo Code Random at 500 bps In addition the product has been tested according to EN 60950 and it can be utilized inside a special insulated housing that
17. pacitor of minimum 100 000 pF 3 Connect electrolytic capacitor 220uF 470uF low ESR close to the pin 1 V_PA LNA Pin interface Put a capacity of 22 100pF close to the corresponding pins of signal connection connected between them and the ground plane The capacitance value varies according to the pin of the module so please follow to the electrical schematic of Figure 4 and 5 and the lay out of figure 6 Ground The mass must surround at the best the welding area of the transmitter and must also be realized in the lower face in order to obtain the optimal result with the through holes connecting the two ground planes Antenna Connect pin 2 antenna to the coaxial connector or antenna with microstrip constant impedance of 50R width 3 2 mm for PCB with thickness 1 6 mm and 1 6 mm for PCB with thickness 1mm see Figure 6 The antenna is a typical rigid copper wire insulated or not of 8cm length and cross section of 0 5 mm 2 placed vertically to the ground plane Other placements of antenna bend spiral will work but performance are not predictable As an alternative to connect the module to an external antenna connect an SMA connector into PCB using microstrip 50 see figure below The proposed lay out below for example shows the connections of signals and power supply on the top and a ground plane on the bottom side of the extended PCB that surrounds the radio module The cross link antenna impedance SOR is 3 2 mm w
18. plications Double transmission mode DIRECT AND PACKET RS 232 signals store and forward operation Irrigation systems No coding or preamble demanded to User in PACKET Instruments and solar panel monitoring MODE Industrial control AT Commands for internal registers programming Animal tracking HyperTerminal compatible SCADA Number of channels 7 max Alarms Overall dimension 38 1x24X4 5 mm AMR UART Data Rate 2400 4800 9600 bps Max ERP max 500 mW High sensibility 118dBm with data rate 500bps Fixed Voltage supply 3 3V Average range 3 Km The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 1 of 17 http www aurelwireless com email rfrcomm aurel it AUEL WIRELESS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY Absolute limits Operating temperature 20 C 70 C Storage temperature 40 C 100 C Power supply 3V Input voltage 1 0 Vcc 0 3V Output voltage 1 0 Vcc 0 3V Technical features Min Tip Max Unit DC Levels Supply voltage pins 1 15 2 7 3 3 3 6 V Power consumption rx mode 32 mA Power consumption tx mode 27
19. ring the RF transmission of 1 packet 0 t ms Picture 4 Two data packets transmission 4 Power Down Mode By bringing to a low level or left open PIN 6 ENABLE device enters into a power saving state the consumption in fact is limited to less than 5 uA In this mode the transceiver can neither receive nor transmit It is necessary to commutate pin 6 in high level 3V to bring it back to the normal operating state NOTE At the first feeding cycle you should enable the Enable pin high after the power supply is stable bring it back down to enter the Power down mode This action is required to ensure the reported consumption in a specific phase in the power down 5 Command Mode Programmation of the module The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 8 of 17 http www aurelwireless com email rfrcomm aurel it AUREL RELESS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY The Command Mode state allows the Owner to configure the operating parameters of the device The programming is carried out by means of AT type commands sent to the TX_UART pin 13 at the speed set by means of pins SP1 and SP2 pin 7 and pin 8 The module s answers shall be given on the RX_UA
20. short circuiting SP1 and SP2 pins to V before of the switching of the device This condition it is not available yet 2 DIRECT MODE pin 5 0 This mode is used to transfer proprietary data packets via RF without the module prepares the data for the transmission In this way the packet must include a preamble long enough and a coding example Manchester in order to balance the average Voltage value Single data duration must be included in time interval between 20mS and 350mS high low Transmission Direct mode transmission is activated bringing pin 7 high TX_RX Data on pin 8 IN_DATA will sent via radio Receiving Same as the transmission It is activated bringing pin 7 low TX_RX Received data will available on pin 9 3 PACKET MODE pin5 1 When a start bit low logic level OV is present on input line RX_UART pin14 and consequently at least one data Byte the device enters in transmission mode Store amp forward system could be described in sequence The technical features can change without forecasting AUR EL S p A doesn t assume any responsibility of damage due to the improper use of the device AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 6 of 17 http www aurelwireless com email rfrcomm aurel it AUREL RELESS RTX LONG RANGE 869MHz USER MANUAL PRELIMINARY Serial reception unit A Transmission RF uni
21. t A RF reception unit B Transmission serial unit B Picture 3 The absence of the data input in Pin 14 is established from an Timeout expiring Fixed by the serial data rate Then the transceiver will not memorize further data input until the effective RF transmission of the data in the internal buffer is occurred The data are transmitted on RF channel only after the serial Rx is expired Likewise the receiver part will analyze the incoming RF packet going on with the serial transmission in case of valid data deleting in case of wrong data Unit A serial STORE i Unit A RF FORWARD Unit A RF transmission Valid packet from unit B and transmitted through serial Radiofrequency Unit B RF STORE gt Unit B serial FORWARD i t ms 0 i Picture 3 store amp forward mechanism As shown by the Pic 3 time diagram the time interval from the starting moment instant 0 when the data reaches the module s port to the moment when it is received by the remote module depends on the number of Bytes that form the packet and also on the serial speeds used for the reception as well as for the transmission For the correct operation of the device consider that it s not allowed to have contemporary phases inside the same unit For instance If A unit is in RF transmission phase eventual incoming data will not memorized in the buffer Fig 4 shows the case of the transmission of two packets in a
22. v 3 3 08 11 2013 Tel 39 0546 941124 Fax 39 0546 941660 Page 17 of 17 http www aurelwireless com email fcomm aurel it
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