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rn-121, RN-122, rn-123 & rn-125 www.rovingnetworks.com rn-121-ds 5/24/2010 809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 1 ~ wifly gx 802.11g super module features ? 802.11b/g phy/mac at up to 54mbps ? qualified 2.4ghz ieee 802.11b/g transceiver ? wi-fi alliance certified for wpa2-psk ? ultra-low power - 4ua sleep, 40ma rx, 210ma tx (max) ? multiple sleep modes, wake up timer or signal ? small form factor 28mm x 40.8mm ? uart, rs-232 ,rs-485 or spi hardware interfaces ? on board ceramic chip antenna and u.fl connector for external antenna ? 15 pios and 8 sensor pins for general use ? real-time clock for wakeup and time stamps ? accepts wide voltage range input 3.3v ? 12vdc (rn-121 and RN-122) ? industrial voltage range input 6v ? 48vdc (rn-123 and rn-125) ? switched power supply for external sensors ? supports adhoc and infrastructure networking ? fcc / ce / ics certified and rohs compliant. ? high speed uart up to 2mbit/s (RN-122) ? high speed uart 64 bytes fifo (RN-122) ? onboard 14 bit temperature sensor (rn-121- temp) ? onboard 12 bit humidity sensor (rn-121- temp) applications ? wireless thermostats ? rs232/rs485 cable replacement ? remote equipment monitoring ? scanners, gps and measurement systems ? industrial sensor and control ? security ? home automation ? medical devices description the wifly gx module is a stand alone, embedded wireless lan/wan access device. because of its small form factor and extremely low power consumption, the rn-121g is perfect for mobile wireless applications such as asset monitoring, gps tracking and portable devices. the wifly gx simplifies the integration and development of your application by including an on board tcp/ip stack a nd networking application programs such as telnet and ftp. the hardware requires only four connections (pwr, tx, rx, gnd) to create a simple wireless data connection. additionally, continuously sampled anal og inputs transmit audio, temperature, motion, or acceleration data without requiring additional hard ware in your end application. the wifly gx module uses a straight forward ascii command set for configuratio n and programming. once the wifly gx is set up it ca n automatically associated and authenticate with a network, making your device accessible worldwide. the wifly gx includes a high-speed uart and spi interfaces that allow high-speed data transfer. the wifly gx module is a complete wireless solution
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 2 ~ block diagram overview ? host data rate up to 100 mbps for sdio, 44 mbps f or spi and 2.7 mbps for uart ? throughput up to 4 mbps with spi, 2mbps with the h igh speed uart ? low power - 110ma tx, 35ma idle, 4ua deep sleep ? real time clock for time stamping, auto-sleep and auto-wakeup modes ? uart and wireless configuration using simple ascii commands. ? over the air firmware upgrade (ftp ? three on board leds for status. ? 32 pin standard 2mm dip socket pin spacing ? 802.11i: open, wep-40, wep-128, wpa-psk (tkip), wp a2-psk, eap-tls for wpa1 & wpa2 enterprise ? tcp/ip, dhcp, udp, dns, arp, icmp, ftp ? supports 802.11 power save modes ? commands for scanning networks roaming modes high-speed uart features ? 64 bytes fifo (transmitter and receiver) ? fully compatible with industrial standard 16c450 a nd equivalent ? baud rates up to 5 mbit/s in 16 clock mode ? auto hardware flow control using rts/cts ? auto software flow control with programmable xon/x off characters spi interface features ? spi master mode ? data rate up to 22mhz ? selectable clock phase and polarity ? selectable data polarity rs-485 features (rn-125 only) ? accepts 6vdc to 48vdc power ? rs-485 signaling with auto-direction control ? onboard line termination resistors
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 3 ~ ? hot-swappable for telecom applications ? 1/4-unit load, allowing up to 128 transceivers on the bus environmental conditions parameter value temperature range (operating) -30 o c ~ +85 o c temperature range (storage) -40 o c ~ +85 o c relative humidity (operating) 90% relative humidity (storage) 90% radio characteristics parameter specifications frequency 2402 ~ 2480mhz modulation 802.11b compatibility : dsss(cck-11, cck-5.5, dqpsk-2, dbpsk-1) 802.11g : ofdm (default) channel intervals 5mhz channels 1 - 14 transmission rate (over the air) 1 ? 11mbps for 802.11b / 6 ? 54mbps for 802.11g receive sensitivity -85dbm typ. output level (class1) +18dbm maximum rf input to u.fl connector 10 dbm
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 4 ~ pin description: rn-121 (ttl uart interface) note: any unused pins should be left floating (no c onnect) pin name description default 1 pio7 general purpose io no connect 2 spower switched sensor output power no connect 3 sense-4 analog sensor input (1.2v) 4 sense-5 analog sensor input (1.2v) 5 sense-6 analog sensor input (1.2v) 6 sense-7 analog sensor input (1.2v) 7 pio6 controls red led input 8 pio9 general purpose io sets factory defaults 9 debug_rx 2 nd serial port no connect 10 debug_tx 2 nd serial port no connect 11 reset active low with 10k built in pullup 12 wake force the module to wake up, input to modul e, 31us min. pulse no connect 13 vin 3.6-16vdc 14 vreg 3.3v ldo output 15 vbatt tie to vreg if using vin battery option 16 gnd ground 17 vdd 3.3v out-in power input 18 spi_mosi spi port mosi line (wifly gx is the mas ter) output 19 spi_ck spi port clock line (wifly gx is the mast er) output 20 spi_cs spi port chip-select line (wifly gx is th e master) output 21 spi_miso spi port miso line (wifly gx is the mas ter) input 22 pio5 controls yellow led connect/disconnect inpu t 23 pio4 controls green led connection status output 24 rtsb/pio13 hw flow control output (onboard uart) / general purpose io ttl output 25 ctsb/pio12/ sense-1 hw flow control input (onboard uart) / general purpose io / analog sensor input (3.3v) ttl input 26 rxb / sense-0 ttl data in (onboard uart) / analog sensor input (3.3v) input 27 txb ttl data out (onboard uart) output 28 nc no connect 29 sense-3 analog sensor input (3.3v) no connect 30 sense-2 analog sensor input (3.3v) no connect 31 nc no connect 32 gnd ground
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 5 ~ pin description: RN-122 (dual uart) note: any unused pins should be left floating (no c onnect) pin name description default 1 pio7 general purpose io no connect 2 spower switched sensor output power no connect 3 sense-4 analog sensor input (1.2v) 4 sense-5 analog sensor input (1.2v) 5 sense-6 analog sensor input (1.2v) 6 sense-7 analog sensor input (1.2v) 7 pio6 controls red led input 8 pio9 general purpose io sets factory defaults 9 debug_rx 2 nd serial port no connect 10 debug_tx 2 nd serial port no connect 11 reset active low with 10k built in pullup 12 wake force the module to wake up, input to modul e, 31us min. pulse no connect 13 vin 3.6-16vdc 14 vreg 3.3v ldo output 15 vbatt tie to vreg if using vin battery option 16 gnd ground 17 vdd 3.3v out-in power input 18 uart_clock high speed uart clock input no connec t 19 nc no connect 20 pio8 general purpose io no connect 21 nc no connect 22 pio5 controls yellow led connect/disconnect inpu t 23 pio4 controls green led connection status output 24 rtsb/pio13 hw flow control output (onboard uart) / general purpose io ttl output 25 ctsb/pio12/ sense-1 hw flow control input (onboard uart) / general purpose io / analog sensor input (3.3v) ttl input 26 rxb / sense-0 ttl data in (onboard uart) / analog sensor input (3.3v) input 27 txb ttl data out (onboard uart) output 28 rtsa ttl hw flow control output (external uart) output 29 ctsa / sense-3 ttl hw flow control input (external uart) / analog sensor input (3.3v) input 30 rxa/sense- 2 ttl data in (external uart) / analog sensor input (3.3v) input 31 txa ttl data out (external uart) output 32 gnd ground
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 6 ~ gpio/modem header pin name description default 1 gpio0 general purpose io no connect 2 gpio1 general purpose io no connect 3 gpio2 general purpose io no connect 4 gpio3 general purpose io no connect 5 gpio4/dsra general purpose io/dsr (external uart) no connect 6 gpio5/dtra general purpose io/dtr (external uart) no connect 7 gpio6/cd general purpose io/cd (external uart) no connect 8 gpio7/ri general purpose io/ri (external uart) no connect electrical characteristics: rn-121 (spi interface) / RN-122 (dual uart) parameter min typ. max. unit supply voltage vin (RN-122 only) 4.0 5.0 12 vdc supply voltage vdd 3.0 3.3 3.6 vdc supply voltage (vbatt option) 2.0 3.0 3.3 vdc uart_clock high-level input voltage (RN-122 only) 2.4 - 5.5 vdc uart_clock low-level input voltage (RN-122 only) uart_clock input capacitance - - 3 pf average power consumption standby/idle (default settings) - 35 - ma sleep 10 12 15 ua (micro) connected(idle, rx) 40 ma connected(tx) 110 180 ma ** note: the RN-122 does not have a regulator fitte d and should not be powered from vin. the power management unit turns off unused function s and switches between sleep and active modes. in s leep mode the real-time clock and sensor interface remai n active, enabling the wifly to wake up at any inte rval or when a specific condition is detected. this ?instant-on? c apability allows mobile devices to remain in low-po wer sleep mode until it is ready to transfer data. the wifly module can wake up, join a network, trans mit data and go back to sleep in under 100 msec . this unique combination of low latency and low powe r makes it possible to run for over two years trans mitting data every 5 minutes using just two standard aaa alkalin e batteries!
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 7 ~ rn-121/ 122 module dimensions led led rn121g 20 mm 2.5 mm 49.25 mm 2.5 mm 1.5 mm 7.0 mm 1.5 mm 22.9 mm 3.0 mm 2 mm pitch headers
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 8 ~ pin description: rn-123 (rs-232 interface) note: any unused pins should be left floating (no c onnect) pin name description default 1 pio7 general purpose io no connect 2 spower switched sensor output power no connect 3 sense-4 analog sensor input (1.2v) 4 sense-5 analog sensor input (1.2v) 5 sense-6 analog sensor input (1.2v) 6 sense-7 analog sensor input (1.2v) 7 pio6 controls red led input 8 pio9 general purpose io sets factory defaults 9 debug_rx 2 nd serial port no connect 10 debug_tx 2 nd serial port no connect 11 reset active low with 10k built in pullup 12 wake force the module to wake up, input to modul e, 31us min. pulse no connect 13 vin 6-48vdc 14 p5v 5vdc input option no connect 15 nc no connect 16 gnd ground 17 p3.3v 3.3v out-in no connect 18 ena_3.3v enable 3.3v regulator (pull low to disa ble) no connect 19 txb- rs485 line 20 txa+ rs485 line 21 pio8 general purpose io no connect 22 pio5 controls yellow led connect/disconnect inpu t 23 pio4 controls green led connection status output 24 rtsb ttl hw flow control output no connect 25 ctsb ttl hw flow control input no connect 26 rxdb ttl data in no connect 27 txdb ttl data out no connect 28 rxda rs232 data in rs232 input 29 txda rs232 data out rs232 output 30 rtsa rs232 hw flow control output rs232 output 31 ctsa rs232 hw flow control input rs232 input 32 gnd ground
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 9 ~ electrical characteristics: rn-123 (rs-232 interfac e) parameter min typ. max. unit supply voltage vin 6.0 24 48 vdc supply voltage p5v 4.0 5.0 6.0 vdc supply voltage p3.3v 3.0 3.3 3.6 vdc average power consumption standby/idle (default settings) - 35 - ma sleep 10 12 15 ua (micro) connected(idle, rx) 40 ma connected(tx) 110 180 ma
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 10 ~ pin description: rn-125 (rs-485 interface) note: any unused pins should be left floating (no c onnect) pin name description default 1 pio7 general purpose io no connect 2 spower switched sensor output power no connect 3 sense-4 analog sensor input (1.2v) 4 sense-5 analog sensor input (1.2v) 5 sense-6 analog sensor input (1.2v) 6 sense-7 analog sensor input (1.2v) 7 pio6 controls red led 8 pio9 general purpose io sets factory defaults 9 debug_rx 2 nd serial port no connect 10 debug_tx 2 nd serial port no connect 11 reset active low with 10k built in pullup 12 wake force the module to wake up, input to modul e, 31us min. pulse no connect 13 vin 6-48vdc 14 p5v 5vdc input option no connect 15 t2 rs485 terminator ? tie to p5v to terminate no connect 16 gnd ground 17 p3.3v 3.3v out-in no connect 18 ena_3.3v enable 3.3v regulator (pull low to disa ble) no connect 19 txb- rs485 line rs485 20 txa+ rs485 line rs485 21 pio8 general purpose io no connect 22 pio5 controls yellow led connect/disconnect inpu t 23 pio4 controls green led connection status output 24 nc no connect 25 nc no connect 26 nc no connect 27 nc no connect 28 nc no connect 29 nc no connect 30 nc no connect 31 t1 rs485 terminator ? tie to gnd to terminate no connect 32 gnd ground
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 11 ~ electrical characteristics: rn-125 (rs485 interface ) parameter min typ. max. unit supply voltage vin 6.0 24 48 vdc supply voltage p5v 4.0 5.0 6.0 vdc average power consumption standby/idle (default settings) - 35 - ma sleep 10 12 15 ua (micro) connected(idle, rx) 40 ma connected(tx) 110 180 ma **note: the 3.3v power input should not be used to power the rn-125 since the rs-485 driver requires a higher input voltage.
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 12 ~ design concerns 1. reset circuit . reset is active low, is optional and does not n eed to be connected. there is a built in voltage monitor that will pull reset low (open drain fet) i f the input voltage drops below 2.7vdc. if extern al reset is desired, use an open drain driver and do not drive the reset pin to any voltage > 1.0 vdc. 2. powering the wifly module . this only applies to the rn-121/RN-122 there are two options to power ? supply 3 to 16vdc power to vin (pin 13). tie vreg (pin 14) to vbatt (pin 15). when vin is powered, vreg is a 3.3vdc output and can be used to power ot her circuits. in this mode vreg has a current limitation of 150 ma ? apply 3.3vdc regulated power to vdd (pin 17). vre g, vbatt and vin should be let no-connect. to run off batteries requires a small hardware chan ges. please order the rn-121/rn-121 in battery mo de use the ?-batt? extension, rn-121-batt for example. ? apply battery = 2.0 to 3.0vdc to vbatt (pin 15) hardware modification required to enable battery mo de on the standard rn-121/RN-122 1. remove r3 and r6, 2. stuff r5 with either r3 or r6 . warning : placing 5vdc or any voltage above 3.3vdc into th e vdd pins of the module will permanently damage the radio module. be sure to use the vin = pin 13 power pin for any power supplied that is > 3.3vdc. 3. factory reset pio9 (pin 8). it is a good idea to connect this pin to a switch, or jumper, or resistor, so it can be accessed. this pin can be used to reset the modul e to factory defaults and is often critical in situ ations where the module has been mis-configured. 4. gpio connections: placing 3.3vdc into the pio?s while they are set as outputs will permanently damage the radio modules. the failure mode is a short across gnd and vcc. use a 10k resistor in series or a 10k pull up resistor for input and output pio?s respectively . 5. sensor connections. the sensor inputs sens1-8 are extremely sensitive to over voltage. under no conditions should these pins be pulled high above 1.2vdc. pla cing any voltage above this will permanently damage the radio module. 6. connection status. pio5 is available to drive an led, and blinks at va rious speeds to indicate status. pio2 is an output which directly reflects the connection st ate, it goes high when connected, and low otherwise . 7. minimizing radio interference. when integrating the wifly module with on board chi p antenna be sure the area around the chip antenna end the module protrud es at least 5mm from the pcb and any metal enclosur e. if this is not possible use the external antenna optio n with the u.fl to reverse polarity sma connector. 8. connecting to the gpio. placing 3.3vdc into the pio?s while they are set as outputs will permanently damage the radio. the failure mode is short across gnd and vcc. use a 10ko resistor is series or a 10ko pull up resistor for input and output pio?s respectively. ? make sure to connect a common ground when using th e external tx, rx inputs on the 0 ? 3.3vdc ? for a 3 wire db-9 interface (tx, rx, gnd only) con nect/short cts to rts, factory default is hardware flow control enabled cts and rts connected. ? when using a 5.0vdc input, pio?s require a 10k ohm series resistor. pio?s are 0-3.3vdc not 5 volt tol erant.
809 university avenue ? los gatos, ca 95032 ? tel (408) 395-6539 ? info@rovingnetworks.com ~ 13 ~ 9. connecting the 2mm headers. the headers on the rn-121 are of 2mm pitch. the par t number for these headers from digikey are: male header: 3m9327-nd female header: 3m9403-nd please note that these are 8 pin headers. you will need two of each to make a 16-pin header. compliance information ? fcc certified ? environmentally friendly rohs compliant ordering information part number description rn-121 uart and spi interfaces, pin compatible with rn-111b rn-121-batt rn-121 configured to be powered by batt eries rn-121-temp with onboard temperature and humidity s ensors RN-122 with two uarts, one high-speed, pin compatib le with rn-111b RN-122-batt RN-122 configured to be powered by batt eries rn-123 with rs-232 interface rn-125 with rs-485 interface for other configurations, contact roving networks d irectly. visit http://www.rovingnetworks.com for current pricing and a list of distributors ca rrying our products. copyright ? 2009 roving networks. all rights reserved. roving networks reserves the right to make correcti ons, modifications, and other changes to its produc ts, documentation and services at any time. customers s hould obtain the latest relevant information before placing orders and should verify that such information is c urrent and complete. roving networks assumes no liability for applicatio ns assistance or customer product design. customers are responsible for their products and applications usi ng roving networks components. to minimize the risk s associated with customer products and applications, customers should provide adequate design and operating safegu ards. roving networks products are not authorized for use in safety-critical applications (such as life supp ort) where a failure of the roving networks product would reason ably be expected to cause severe personal injury or death, unless officers of the parties have executed an agr eement specifically governing such use. all other trademarks are property of their respecti ve owners.

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