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zulu m zulu m zulu m zulu m d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 radio modem module radio modem module radio modem module radio modem module applications applications applications applications ? ? remote networking ? usb/rs232 cable replacement ? ? remote data log ? ? meter reading the zulu modem module is a highly integrated rf mod em and intelligent controller with simple interface to achieve a wireless serial data link for data (upto 38k4bps) over 2km range. range may be further extended with suita ble antenna. the user interface is standard rs232 style control operating at low voltage. all rf op- eration is automatically controlled (with error che cking etc) so the zulu can be treated as a simple communications device. possible applica tions include one-to-one and multi- node wireless links in applications including car a nd building security, epos, inventory tracking, remote industrial process monitoring and computer networking. because of their small size and low power requirements this mo dule is ideal for use in portable, battery-powered applications such as hand-held term inals. part no part no part no part no description description description description zulu-m868 radio modem module dip package zulu-m868-so radio modem module smt package features features features features ? intelligent rf modem module ? serial data interface with handshake ? host data rates up to 38,400 baud ? rf data rates to 56kbps ? ? range up to 2km ? ? minimal external components ? direct led drive shows data flow ? 8 user selectable channels ? ? secure data protocol ? ? ultra low power 1.8 - 3.6v operation ? ? ce compliant for licence free use ? ? 868mhz or 915mhz versions ? ? 100mw transmit power (+20dbm) ? ? receiver sensitivity C121dbm
zulu modem zulu modem zulu modem zulu modem d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 pinout pinout pinout pinout pin description pin description pin description pin description pin no pin no pin no pin no name name name name direction direction direction direction description description description description 1 ant in antenna input / output 50ohm impedance 2, 15 gnd in connect to ground 3-5, 11, 13-14, 20-24 n/c n/a unused leave disconnected. 6 rx in (low level rs232) data in 7 tx out low level rs232 data out 8 link in connect to link on pin 28 9 cts out low level rs232 cts 10 rts in low level rs232 rts 12 reset in device reset input (tie high via 10k res istor) 16 vcc in +2.2-3.6v 17-18 dr1-dr2 in host data rate selection. 19 wre in when high configuration data is held in eeprom. when low configuration data is held in volatile mem ory and lost on power cycle. 25 pd in power down mode. take low to enter sleep m ode 26 tx led out rf tx led indicator 27 rx led out rf rx led indicator 28 link out connect to link on pin 8 29-30 xtal1-2 in connect 30mhz xtal here to drive rf circuit
zulu modem zulu modem zulu modem zulu modem d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 pin descriptions: pin descriptions: pin descriptions: pin descriptions: rx, tx rx, tx rx, tx rx, tx this is the data input / output. data is transmitte d and received at the low voltage level (dependant on vcc being used). compatible with lctt l / lvcmos serial data format serial data format serial data format serial data format baud rate: defined by dr1 and dr2 pins data bits: 8 parity: none stop bits: 1 flow control: hardware cts / rts cts, rts cts, rts cts, rts cts, rts clear to send and request to send are standard data flow control used in rs232 systems, these are standard but operate at the zulu vcc low level voltage. if no handshaking required rts may be pulled low, h owever beware of data overrun errors of transmitting streams of data longer than the data b uffer! reset reset reset reset connection to gnd resets the zulu module. zulu modem starts up when this input is taken from gnd to vcc. normal operation: connect to vcc t hrough a 10kohm resistor vcc: vcc: vcc: vcc: supply voltage (2.23.6v) dr1 dr1 dr1 dr1 - -- - dr2 dr2 dr2 dr2 these inputs define the host interface baud rate. t hey are read when reset pin goes high. tip: it is good practice to operate the host interf ace at half the speed of the rf data rate (set by register r5 pd pdpd pd this input enables sleep mode. for normal operati on connect to vcc. no rf packets will be received by the module when it is in sleep mode. wre wre wre wre controls where the user configuration parameters ar e saved in internal eeprom (non- volatile) or ram (volatile) un-used. thiis may be ig nored unless the application requires specif- ic address timimng on powerup. tx / rx led tx / rx led tx / rx led tx / rx led direct led drive which operates whenever there is rf activity. xtal1, xtal2 xtal1, xtal2 xtal1, xtal2 xtal1, xtal2 the zulu module requires a 30mhz drive crystal to b e connected between xtal1-2 any standard crystal +/-10ppm ~20pf such as fec 18 4-2247. dr1 dr1 dr1 dr1 dr2 dr2 dr2 dr2 host baud rate host baud rate host baud rate host baud rate vcc / unconnected vcc / unconnected 4,800 vcc / unconnected gnd 9,600 gnd vcc / unconnected 19,200 gnd gnd 38,400
zulu modem zulu modem zulu modem zulu modem d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 operation overview operation overview operation overview operation overview the zulu modem module provides a simple modem inter face to the host controller. it han- dles all rf data communications automatically and wi thout any requirement from the user (rf packetising , preamble, encoding, crc check etc). with this powerful high-speed radio link. the follow ing networks can be realised; one one one one- -- -to toto to- -- -one operation; one operation; one operation; one operation; for point to point data communicatio n one one one one- -- -to toto to- -- -many many many many; a network consisting a master and many slaves (the receivers all have the same address) many many many many- -- -to toto to- -- -one; one; one; one; where the transmitters all send to a single re ceiver address. because each zulu modem can contain a unique addres s, multiple zulu networks can co- exist in the same area. broadcast operation; broadcast operation; broadcast operation; broadcast operation; where a single master zulu mod em addresses many zulu modems concurrently. (using many zulu modem modules set to the same address), operating modes operating modes operating modes operating modes configuration mode: configuration mode: configuration mode: configuration mode: in configuration mode the zulu modem can receive a number of com- mands and the internal registers can be preset to c ontrol its operation. in this mode the zulu modem is offline and cannot send or receive rf dat a. normal operation : normal operation : normal operation : normal operation : zulu modem is online automatic ally transmitting and receiving data from its host and across the rf network. each zulu modem has its own preset address. this is user set during configuration. any da- ta received is examined and the address header embe dded within the data packet is compared with its address. only data received with matching address will be processed and output to the host, all other data will be discarded. all zulu modem modules are shipped with a default a ddress of 7e7e7e. the zulu modem contains an on-board data buffer equ al to two data packets. therefore if rts is asserted (then the host is unable to receive data) the module will store a max of two data packets, all further data packets received wil l be discarded. application circuit application circuit application circuit application circuit connection of the zulu modem to an rs232 or usb host terminal device such as a p c serial port may easily be achieved. an evaluation board is available which provides thi s capability a schematic is printed in this datasheet.
zulu modem zulu modem zulu modem zulu modem d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 configuration mode (offline) configuration mode (offline) configuration mode (offline) configuration mode (offline) commands can be set using a standard terminal progr am or by sending the relevant ascii characters. each command must be followed by the carriage return or enter each command must be followed by the carriage return or enter each command must be followed by the carriage return or enter each command must be followed by the carriage return or enter note all commands are entered in upper case note all commands are entered in upper case note all commands are entered in upper case note all commands are entered in upper case command command command command description description description description +++ enter configuration mode note: these must be sent as a string with no char in front or behind this is to ensure that the +++ is not mistakenly received in mid data. ? retrieve the current register values f set factory defaults; r1=7f7f7f r2=7f7f7f r3 = ch2 (869.450mhz) r4 = 7 (+20dbm) r5 = 1 (19k2) h help s s save configuration q exit configuration mode and return to online mode response from zulu response from zulu response from zulu response from zulu zulu responds with status info zulu responds with all register values ok brief description of commands available saved no response p ping mode this sends a ping request . on receiving, the recipient zulu modem will respond with its address and the level of rssi (received signal strength) the ping command is continuously repeat- ed every 1 second until any command or character is entered. the originating zulu modem will respond with the recipient zulu modems response, eg. received from 7f7f7f (d5) where 7f7f7f = the recipient address d5= rssi rssi rssi rssi rssi is a hex value corresponding to the re- ceived signal strength min = 20hex max =e0hex
zulu modem zulu modem zulu modem zulu modem d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 register setting (configuration mode) register setting (configuration mode) register setting (configuration mode) register setting (configuration mode) the internal registers enable various parameters to be controlled. to set a register type r#=x where # is the regist er number (1-6) and x xx x is the value to set for example, for example, for example, for example, to set the channel to channel 3 type t he following. r3=3 (where is carriage return or enter on the keybo ard) the modem will then return ok or error if an incorrect command is entered. save th e changes by typing s the modem will return with saved register register register register value range value range value range value range description description description description example example example example r1 0000 - ffffff (24 bit address) sets the recipient zulu mo- dem address r1=0001 (data sent is addressed to zulu modem with address 0001) r2 0000 - ffffff (24 bit address) set own zulu modem address r2=f001 (data sent is from zulu modem with address f001) r3 ch0 = 868.400 mhz ch1 = 868.900 mhz ch2 = 869.450 mhz ch2 = 869.450 mhz ch2 = 869.450 mhz ch2 = 869.450 mhz ch3 = 869.600 mhz ch4 = 869.800 mhz set rf channel r3=2 (transmit on channel 2) r4 0 = +1dbm 1 = +2dbm 2 = +5dbm 3 = +8dbm 4 = +11dbm 5 = +14dbm 6 = +17dbm 7 = +20dbm 7 = +20dbm 7 = +20dbm 7 = +20dbm set the rf transmit power output* r4=7 (sets transmit power to max)* r5 0 = 9,600 1 = 19,200 1 = 19,200 1 = 19,200 1 = 19,200 2 = 28,800 3 = 56,000 set the rf baud rate* r5=3 (sets the rf data rate to 56kbps) *note : reducing tx power reduces battery consumpti on! reducing the baud rate will increase the range! channel number channel number channel number channel number frequency frequency frequency frequency centre (mhz) centre (mhz) centre (mhz) centre (mhz) eu power allowance eu power allowance eu power allowance eu power allowance mw / dbm mw / dbm mw / dbm mw / dbm notes notes notes notes 0 868.400 25 / 14 1 868.900 25 / 14 2 869.450 100 / 20 3 869.600 100 / 20 4 869.800 25 / 14 applicable standard - en300-220 notes on power and frequency notes on power and frequency notes on power and frequency notes on power and frequency the eu standard sets maximum power transmission lim its dependent on the frequency, the bandwidth and the application. please check the rel evant standards are being met when imple- menting your rf application. a rough guidance applic able to the zulu channel numbers is giv- en below
zulu modem zulu modem zulu modem zulu modem d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 range range range range the antenna choice and position affects controls th e system range. keep it clear of any large metal components in the system. the best position b y far, is protruding vertically from the top of the product. this is often not desirable for pra ctical reasons and thus a compromise may be needed. note that the space around the antenna is a s important as the antenna itself. all ra- dio systems are dependant on a radio signal being r eceived through airspace. the range quoted is the optimal in direct line of s ight without obstacles and in good atmos- pheric conditions. range is affected by many things, for example local environmental conditions, atmospheric conditions, interference from other radio transmitt ers. for evaluating the local environment please see our rf meter (ds006) in the worst case, range quoted may be drastically reduced. mechanical dimensions mechanical dimensions mechanical dimensions mechanical dimensions recommended antenna recommended antenna recommended antenna recommended antenna the bead antenna provides a miniature pcb mounting solution where performance is required from a small space . available as straight or 90 degree mount this anten na is a gen- eral purpose omni-directional. it measures 8.5mm lo ng, dia 7mm. please see datasheet ant-bead-868
zulu modem zulu modem zulu modem zulu modem d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 technical specifications technical specifications technical specifications technical specifications absolute maximums absolute maximums absolute maximums absolute maximums : :: : temperature range temperature range temperature range temperature range: storage C50 to +125 o c. weight: smt version 7grams, dip part 13grams parameter parameter parameter parameter min min min min max max max max units units units units supply voltage 4.0 v voltage on any input vcc > 2.2 vcc < 2.2 5.8 vcc + v v max input power (thro antenna) +5 dbm parameter parameter parameter parameter min min min min typical typical typical typical max max max max units units units units supply voltage 1.8 3.6 v operating temperature -40 +85 o c zulu tx supply current: when transmitting (at max power) when sleeping 85 1 ma ua zulu rx supply current: when receiving when sleeping 18.5 1 ma ua ac characteristics ac characteristics ac characteristics ac characteristics parameter parameter parameter parameter min min min min typical typical typical typical max max max max units units units units operating frequencysee freq channel setting 868 8 70 mhz operating temperature -40 +85 o c deviation 45 khz zulu txrx fsk raw rf data rate 9.6 56 kbps zulu rx sensitivity -121 dbm band width per channel 100 khz zulu tx max output power +20 dbm
zulu modem zulu modem zulu modem zulu modem d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 zulu modem evaluation board zulu modem evaluation board zulu modem evaluation board zulu modem evaluation board the zulu eval board provides a ready made platform which can be used to demonstrate the capabilities of zulu modem modules providing ready made rs232 and usb modem solutions. part no part no part no part no description description description description zulueval-m zulu modem eval board psu-12v100mauk plugtop power supply 12v 100ma features features features features ? ? direct connection to rs232 / usb ? 9-12vdc power in screw terminal ? led indication transmit / receiver ? user config jumper links
zulu modem zulu modem zulu modem zulu modem d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 eval board configuration eval board configuration eval board configuration eval board configuration power requirements: 9 power requirements: 9 power requirements: 9 power requirements: 9- -- -15vdc 15vdc 15vdc 15vdc weight: 27grams, dimensions: config links config links config links config links usb / d links (lk2,3,4,5) usb / d links (lk2,3,4,5) usb / d links (lk2,3,4,5) usb / d links (lk2,3,4,5) for usb connect all links from centre to usb side for rs232 connect all links from centre to rs232 si de antenna connector antenna connector antenna connector antenna connector the connector is a 4mm screw thread (part no: scrtm 4ra) power connection power connection power connection power connection power is only required for rs232 comms, usb connecti on provides power automatically host terminal software host terminal software host terminal software host terminal software connection to host is via the micro-usb cable or rs2 32 cable. any terminal emulation program can interface the ev al board, one we have found to be easy to use and powerful is terminal this can be downloaded from : https://sites.google. com/site/terminalbpp/ https://sites.google.com/site/terminalbpp/ notes for optimising range notes for optimising range notes for optimising range notes for optimising range in order to obtain the best range 1. use max rf transmit power (set register r4 = 7) 2. use the slowest rf comms rate (set register r5 = 0) 3. power the eval boards from 12v (don't rely on th e usb power) 4. consider upgrading the antennas to models with g ain. link ref link ref link ref link ref name name name name when fitted when fitted when fitted when fitted when open when open when open when open pd power down modem is placed in sleep mode normal operation wre write enable on each power up with zulu config setting are reset to de- faults on power up zulu config settings remain unchanged dr1 dr2 sets host baud dr1 dr2 open open open fitted fitted open fitted fitted baud rate: 4800 9600 19200 38400
zulu modem zulu modem zulu modem zulu modem d dd ds ss s- -- -z zz zu uu ul ll lu uu um mm m- -- -2 22 2 zulu modem evaluation board schematic zulu modem evaluation board schematic zulu modem evaluation board schematic zulu modem evaluation board schematic
zulu modem zulu modem zulu modem zulu modem whilst the information in this document is believed to be correct at the time of issue, rf solutions l td does not accept any liability whatsoever for its accuracy, adequacy or completeness. no express or implied war ranty or representation is given relating to the in formation contained in this document. rf solutions ltd reserves the right to make changes and improvements to the product(s) described herein without notice. buyers and other users should determine for them- selves the suitability of any such information or p roducts for their own particular requirements or sp ecification(s). rf solutions ltd shall not be liab le for any loss or damage caused as a result of users own determin ation of how to deploy or use rf solutions ltds pr oducts. use of rf solutions ltd products or compon ents in life support and/or safety applications is not a uthorised except with express written approval. no licences are created, implicitly or otherwise, unde r any of rf solutions ltds intellectual property rights. liabi lity for loss or damage resulting or caused by reli ance on the information contained herein or from th e use of the product (including liability resulting from neglige nce or where rf solutions ltd was aware of the poss ibility of such loss or damage arising) is excluded . this will not operate to limit or restrict rf solutions ltds lia bility for death or personal injury resulting from its negligence. reader response reader response reader response reader response it is our intention to provide you with the best do cumentation possible to ensure successful use of your rf solutions product. if you wish to provide your comments on organizatio n, clarity, subject matter, and ways in which our documentation can better serve you, pleas e email us your comments to the tech- nical publications manager application: would you like a reply? y / n datasheet: DS-ZULUModem-1 questions: 1. what are the best features of this document? 2. how does this document meet your hardware and so ftware development needs? 3. do you find the organization of this document ea sy to follow? if not, why? 4. what additions to the document do you think woul d enhance the structure and subject? 5. what deletions from the document could be made w ithout affecting the usefulness? 6. is there any incorrect or misleading information (what and where)? 7. how would you improve this document? r f solutions ltd., r f solutions ltd., r f solutions ltd., r f solutions ltd., unit 21, cliffe industrial estate, unit 21, cliffe industrial estate, unit 21, cliffe industrial estate, unit 21, cliffe industrial estate, lewes, e. sussex. bn8 6jl. england. lewes, e. sussex. bn8 6jl. england. lewes, e. sussex. bn8 6jl. england. lewes, e. sussex. bn8 6jl. england. email : email : email : email : sales@rfsolutions.co.uk sales@rfsolutions.co.uk sales@rfsolutions.co.uk sales@rfsolutions.co.uk http://www.rfsolutions.co.uk http://www.rfsolutions.co.uk http://www.rfsolutions.co.uk http://www.rfsolutions.co.uk tel sales: tel sales: tel sales: tel sales: 01273 898 020 01273 898 020 01273 898 020 01273 898 020 tel technical: tel technical: tel technical: tel technical: 01273 898 007 01273 898 007 01273 898 007 01273 898 007 tel gen enq: tel gen enq: tel gen enq: tel gen enq: 01273 898 000 01273 898 000 01273 898 000 01273 898 000 rf solutions ltd. recycling notice rf solutions ltd. recycling notice rf solutions ltd. recycling notice rf solutions ltd. recycling notice meets the following ec directives: do not do not do not do not discard with normal waste, please recycle. rohs directive 2002/95/ec rohs directive 2002/95/ec rohs directive 2002/95/ec rohs directive 2002/95/ec specifies certain limits for hazardous substances. weee directive 2002/96/ec weee directive 2002/96/ec weee directive 2002/96/ec weee directive 2002/96/ec waste electrical & electronic equipment. this produ ct must be disposed of through a licensed weee collection point. rf solutions ltd., fulfils i ts weee obligations by membership of an ap- proved compliance scheme.

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