CN201732360U - Wireless serial port data transmission terminal - Google Patents
Wireless serial port data transmission terminal Download PDFInfo
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- CN201732360U CN201732360U CN2009203163166U CN200920316316U CN201732360U CN 201732360 U CN201732360 U CN 201732360U CN 2009203163166 U CN2009203163166 U CN 2009203163166U CN 200920316316 U CN200920316316 U CN 200920316316U CN 201732360 U CN201732360 U CN 201732360U
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- transmission terminal
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Abstract
The utility model provides a wireless serial port data transmission terminal which comprises an RS-232C interface, a transistor-transistor logic (TTL) electrical level changeover circuit, a microcontrol unit, a power supply, a battery charging management circuit and a wireless communication module which are connected with the device of the opposite side. The data of a sender device is received by the terminal through the RS-232C interface, is forwarded to the wireless communication module after being processed by the microcontrol unit, and then is sent out in a wireless way by the wireless communication module. In a receiving party, the data is received by the wireless communication module, is forwarded to the microcontrol unit, and is finally received by a receiver device through the RS-232C interface. The wireless serial port data transmission terminal realizes the wireless data transmission between two devices or among a plurality of devices. The communication distance reaches 1200 meters in the visibility range. Lithium battery can be used to supply power. A main control microprogrammed control unit (MCU) chip is used to ensure the independence of the wireless serial port data transmission terminal.
Description
Technical field
The utility model relates to a kind of wireless serial data transmission terminal, is a kind of intelligent terminal communication facilities based on light mechanical and electrical integration.
Background technology
The EIA RS-232C standard of announcing in 1970 is U.S. Electronic Industries Association (EIA) and the common standard of formulating that is used for serial communication of BELL company and modulation producer and each computation machine terminal production firm.This standard is suitable for the serial communication of message transmission rate in 0～20000b/s scope.At present, the communication facilities produced of each current equipment vendors all with the RS-232C compatibility.The RS-232C serial communication is usually used in the data communication of the external unit of various people-machine switching equipment and serial storage, also is usually used in control in real time and management aspect and the classification of adopting the multi-microcomputer processor to form distribute the system of control.But, adopt the communicating pair of RS-232C communication mode need use the wire communication cable to be connected, communication distance is restricted, and complicated wiring will increase cost.Development along with the wireless electron technology, some wireless serial products have appearred, but these wireless serial only can realize replacing wired connected mode with wireless mode, the main control chip that does not have data transmission, itself can't carry out pre-service to data, does not have independence, and is subjected to the restriction of emissive power, transmission range is short, poor reliability.
Summary of the invention
The purpose of this utility model is to provide a kind of wireless serial data transmission terminal, realize the wireless transmission of data between two equipment, the advanced person's of employing Atmel company Mega Series chip chip is realized the control to communication process, adopts advanced wireless transport module to realize that communication distance reaches 1200 meters reliably data communication efficiently at horizon range.
The technical scheme that its technical matters that solves the utility model adopts is: this wireless serial data transmission terminal, RS-232C interface that comprises and method, apparatus is connected and Transistor-Transistor Logic level change-over circuit thereof, micro-control unit and wireless communication module, it is characterized in that: described RS-232C interface connects RS-232C and Transistor-Transistor Logic level change-over circuit, RS-232C is connected with micro-control unit with the interface of Transistor-Transistor Logic level change-over circuit, the communication interface of micro-control unit is connected with wireless communication module, RS-232C and Transistor-Transistor Logic level change-over circuit module, micro-control unit all is connected with power supply and charging circuit with wireless communication module, RS-232C and Transistor-Transistor Logic level change-over circuit module, micro-control unit all is connected with condition indication circuit with wireless communication module.
The course of work of the present utility model: this wireless serial data transmission terminal is made up of with Transistor-Transistor Logic level change-over circuit, micro-control unit, power supply and battery charging management circuit and wireless communication module RS-232C interface, RS-232C.Wherein, the RS-232C interface is connected with transmit leg equipment, and the data of equipment arrive this terminal through the RS-232C interface, delivers to wireless communication module after being handled by micro-control unit, by wireless communication module data is sent wirelessly; The opposing party of communication, receive data by wireless communication module earlier, pass to micro-control unit, arrive receiver equipment by the RS-232C interface at last.
Described standardized RS-232C interface and Transistor-Transistor Logic level change-over circuit thereof adopt chip maxim3232cse chip.For serial communication provides the required level of electrical specification of EIA-RS-232C standard, promptly ± 3v～± 12v, realize conversion with Transistor-Transistor Logic level.
Described micro-control unit adopts the ATMega162 single-chip microcomputer of Atmel company, realizes the functions such as conversion, communication mode control, data check to the communication format of data.
Described power supply and charging circuit are made up of three chip maxim1837, maxim1811 and maxim1797 and correspondent peripheral circuit.This circuit provides stable operating voltage for system, and possesses the Charge Management function, can give lithium cell charging in for system's power supply, and lithium battery also can be used as the power supply of system.
Described wireless communication module adopts the flush bonding module IPLink-1223 based on the low-power consumption of IEEE802.15.4/zigbee technology of helicomm company.The ISM that module is operated in the 2.4GHz global general-use exempts to pay on the frequency range, has 16 communication channels, and message transmission rate reaches 250kb/s, support starlike, mix elastification topology design such as tree-shaped, mesh network, maximum can be supported 255 nodes.
Be connected with working station indicator and indicator of the power supply status in the described condition indication circuit.
Described wireless communication module is wireless receiving and transmitter.
Compared with prior art, the utlity model has following characteristics and beneficial effect: the wireless transmission that realizes two or more equipment room data, upgrade the smoothly transmission mode of wired (RS232/485/TTL) in the original system is exempted wiring cost, improves the dirigibility of data transmission.
Adopt jumbo lithium battery as power supply, can work 8 hours under the situation that does not have external D.C. regulated power supply power supply, the aptitude chargeable circuit of band Charge Management can be realized rapid charge and the discharge prevention to battery.
At present, common wireless serial has just realized with the wired connected mode of wireless replacement, the utility model wireless serial data transmission terminal has adopted micro-control unit, has independence, can be undertaken alternately by serial ports and equipment, the transparent data transmission of byte-oriented can be provided, can adapt to different User Agreements, realize functions such as conversion, the communication mode to the data communication format controlled, transmission data check.
Adopted advanced embedded radio module I P-Link1223 as radio receiving transmitting module, communication distance reaches 1200 meters at horizon range, can form easily starlike, mix tree-shaped, mesh communication network, realize point-to-point, point-to-multipoint, multiple combinations of communication mode such as multi-multipoint.
Description of drawings
Fig. 1 is the inside theory diagram of the utility model wireless serial data transmission terminal.
Fig. 2 is the utility model wireless serial data transmission terminal RS-232C and Transistor-Transistor Logic level change-over circuit.
Fig. 3 is the utility model wireless serial data transmission terminal micro control unit circuit.
Fig. 4 is the utility model wireless serial data transmission terminal wireless communication module circuit.
Fig. 5 is the utility model wireless serial data transmission terminal power supply and battery charger.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 1, the utility model wireless serial data transmission terminal is connected with subscriber equipment by the RS-232C interface of standard, data enter the wireless serial data transmission terminal from the RS-232C interface, at first pass through the Transistor-Transistor Logic level change-over circuit, general ± 3v～± the 12v level conversion is the standard Transistor-Transistor Logic level, enter micro-control unit then, data are carried out pre-service by micro-control unit; Afterwards, micro-control unit sends the data to wireless communication module, by wireless communication module data is sent wirelessly; The opposing party of communication, receive data by wireless communication module earlier, be sent to micro-control unit, handle accordingly by micro-control unit, be converted to the RS-232C level by level shifting circuit at last, promptly ± 3v～± 12v, data are sent to receiver equipment; Power circuit is made up of lithium battery and charging circuit, and this circuit can insert external D.C. regulated power supply, for system provides operating voltage, can carry out rapid charge to lithium battery simultaneously, has the function of charge protection; Condition indication circuit then is made up of 4 pilot lamp, is respectively Data Receiving and transmission pilot lamp, mode of operation pilot lamp and indicator of the power supply status.
Referring to Fig. 2, U3 in the wireless serial data transmission terminal level shifting circuit plays the effect of changing mutually between the level of Transistor-Transistor Logic level and RS-232C standard, adopt the maxim3232cse chip of maxim company, can adopt the operating voltage of 3.3v or 5.0v, this circuit adopts 5v voltage VCC_5 as operating voltage.The 1 pin C1+ of U3 links to each other by capacitor C 7 with 3 pin C1-, 4 pin C2+ link to each other by capacitor C 6 with 5 pin C2-, 2 pin V+ are connected to VCC_5 through capacitor C 8, and 6 pin V-then pass through capacitor C 9 ground connection, and 16 pin VCC receive VCC_5,15 pin GND ground connection, 14 pin are that 1 pin of output terminal T1OUT and P4 connects, and 2 pin of 13 pin R1IN and P4 connect, the 3 pin ground connection of P4, P4 provides 3 line RS-232C interfaces of the standard of using to the user, and wherein T1OUT and R1IN are the TXD and the RXD signal of RS-232C interface.11 pin RS232_TXD receive the TXD pin of main control chip mega162, and are connected to VCC_5 by current-limiting resistance R8 and light emitting diode DS2, have constituted the transmission signal indicating circuit; 12 pin RS232_RXD are connected to the RXD pin of main control chip mega162, and are connected to VCC_5 by current-limiting resistance R9 and light emitting diode DS3, have constituted the received signal indicating circuit.7～10 pin do not use, and do not link to each other with any device.
Referring to Fig. 3, U2 is a main control chip in the wireless serial data transmission terminal micro control unit circuit, adopts the mega162 chip of atmel corp.The 17 pin VCC of U2 are connected with operating voltage VCC_5, adopt the power supply of 5v power supply, and 39 pin are that GND links to each other with ground.The 4 pin RESET of U2 are reset pin, are connected to operating voltage VCC_5 through resistance R 3.The 14 pin XTAL2 of U2 and 15 pin XTAL1 are connected 2 pin and 1 pin of external crystal-controlled oscillation Y1 respectively, pass through capacitor C 4, C5 ground connection simultaneously respectively, and Y1 adopts the external crystal oscillator of 16MHz.The 22 pin TCK of U2,23 pin TMS, 24 pin TDO and 25 pin TDI are the JTAG debug signal line of chip, be connected to VCC_5 through resistance R 4, R6, R5 and R7 respectively, simultaneously, link to each other with 1 pin, 3 pin, 2 pin and 5 pin of P3 interface respectively, P3 is the JTAG debugging interface, and 4 pin of P3 and 7 pin and operating voltage VCC_5 connect, 6 pin of P3 and 10 pin ground connection, 8 pin and 9 pin are unsettled, have constituted the JTAG debug circuit of system.The 1 pin MOSI of U2,2 pin MISO and 3 pin SCK are the ISP signal wire of chip, receive 1 pin, 6 pin and 4 pin of P2 respectively, P3 is the ISP debugging interface of system, the 3 pin RST of P3 link to each other with the 4 pin RESET of U2,2 pin of P3 are unsettled, 8～10 pin ground connection of P3, thus constituted the ISP debug circuit of system.P1 is a serial ports wire jumper interface, 1 pin of P1 links to each other with 4 pin TX0 with the 3 pin RX0 of wireless communication module U1 respectively with 7 pin, 3 pin of P1 link to each other with 42 pin RXD1 with the 5 pin RXD0 of main control chip U2 respectively with 5 pin, 9 pin of P1 and 11 pin are connected 7 pin TXD0 and the 43 pin TXD1 of U2 respectively, 13 pin of P1 are connected with 7 pin TXD0 with the 5 pin RXD0 of U2 respectively with 15 pin, 2 of P1,4,6 pin all are connected on the 12 pin RS232_RXD of the U3 in the level shifting circuit, 8 of P1,10,12 pin all are connected on the 11 pin RS232_TXD of U3, and 14 pin of P1 then link to each other with 3 pin RX0 with the 4 pin TX0 of wireless communication module U1 respectively with 16 pin.Other pins of U2 all do not link to each other with any pin.
Referring to Fig. 4, the circuit of the wireless communication module of wireless serial data transmission terminal is mainly realized the wireless transmission of data, U1 is the radio communication mold chip block in the circuit, adopts the embedded radio module I P-Link1223 based on the low-power consumption of IEEE802.15.4/zigbee technology of helicomm company.Wherein, the 6 pin GND ground connection of U1,7 pin VCC meet operating voltage VCC_3.3, and operating voltage VCC_3.3 must be through filtering capacitor C 1 and C2 ground connection.The 5 pin MCU_Reset of U1 draw wireless serial data transmission terminal pin for resetting, link to each other with VCC_3.3 and process C3 ground connection through R1, thereby constitute reset circuit.The signaling interface that the 3 pin RX0 of U1 and 4 pin TX0 provide for module links to each other with MCU_TX0 with the MCU_RX0 of main control chip respectively.The 1 pin P0.0 of U1 then is connected to VCC_3.3 through light emitting diode DS1 and current-limiting resistance R2 thereof, has constituted the indicating circuit of the duty and the mode of operation of wireless communication module, and indicating module is operated in transparent transmission pattern or binary mode.All the other pins of U1 all do not link to each other with any device.
Referring to Fig. 5, wireless serial data transmission terminal power supply and battery charger have adopted 3 chips, are respectively U5 among the max1837(figure), U4 among the max1811(figure) and max1797(figure in U6).Wherein, U4 is the intelligent battery management of charging and discharging chip max1811 that adopts maxim company, play effect to lithium cell charging and discharge prevention, P5 is the external power source input, USB_IN is the direct current 5v voltage input of voltage stabilizing, USB interface power taking that also can slave unit, the 1 pin ground connection of P5,2 pin are the positive source input, and this input links to each other with the 1 pin SELV of U4; 3 pin of U4 and 6 pin ground connection, 2 pin SELI receive ground by resistance R 11, and 4 pin IN are by capacitor C 11 ground connection, and 4 pin are connected to the 8 pin CHG of U4 through current-limiting resistance R10 and LED 3, have constituted charging indication; The 7 pin EN of U4 are connected with external input voltage USB_IN, and the 5 pin BATT of U4 are connected with 2 pin of P6, and it is lithium cell charging that charging voltage V_BATT=4.2v is provided, and charging current reaches 500mA, and V_BATT receives ground by 1 pin of capacitor C 10 and P6.
U5 adopts the max1837 chip of maxim company among Fig. 5, and USB_5 voltage drops to 3.3v, for communication module IPLink1223 provides operating voltage and up to the electric current of 250mA.Wherein, the 1 pin FB of U5 and 2 pin GND ground connection, 3 pin IN are connected with USB_5, through C13 ground connection, the 5 pin SHDN of U5 are connected with USB_5, and 6 pin OUT export as 3.3v voltage U SB_3.3 through capacitor C 12 ground connection, 4 pin LX receive output terminal USB_3.3 through L1 simultaneously through voltage stabilizing diode ground connection.
U6 adopts the chip max1797 that boosts of maxim company among Fig. 5, plays the effect that the V_BATT that lithium battery is provided rises to 5v, and the load current of 450mA is provided, and has low battery detection circuit and turn-off capacity, can protect battery not by overdischarge.The 1 pin LBI of U6 is connected with V_BATT and passes through R13 and be connected to ground through R12 respectively, V_BATT is by C14 ground connection, be connected to 3 pin LBO and the 4 pin SHDN of U6 simultaneously through R15,3 pin of U6 and 4 pin all are connected to the base stage of Q1, and Q1 process R14 is connected to the 1 pin LBI of U6 simultaneously, and 8 pin of U6 connect the power supply V_BATT of lithium battery, 5 pin ground connection, 6 pin LX are connected with V_BATT through L2, the 7 pin OUT output 5v voltage U SB_5 of U6, and 7 pin are through two filter capacitor C15 and C16 ground connection.
Claims (7)
1. wireless serial data transmission terminal, RS-232C interface that comprises and method, apparatus is connected and Transistor-Transistor Logic level change-over circuit thereof, micro-control unit and wireless communication module, it is characterized in that: described RS-232C interface connects RS-232C and Transistor-Transistor Logic level change-over circuit, RS-232C is connected with micro-control unit with the interface of Transistor-Transistor Logic level change-over circuit, the communication interface of micro-control unit is connected with wireless communication module, RS-232C and Transistor-Transistor Logic level change-over circuit module, micro-control unit all is connected with power supply and charging circuit with wireless communication module, RS-232C and Transistor-Transistor Logic level change-over circuit module, micro-control unit all is connected with condition indication circuit with wireless communication module.
2. wireless serial data transmission terminal according to claim 1 is characterized in that: described RS-232C and Transistor-Transistor Logic level change-over circuit are the maxim3232cse chips.
3. wireless serial data transmission terminal according to claim 1 is characterized in that: described micro-control unit is the atmega162 single-chip microcomputer.
4. wireless serial data transmission terminal according to claim 1 is characterized in that: described power supply and charging circuit are made up of three chip maxim1837, maxim1811 and maxim1797 and correspondent peripheral circuit.
5. wireless serial data transmission terminal according to claim 1 is characterized in that: described wireless communication module is the flush bonding module IPLink-1223 of low-power consumption.
6. wireless serial data transmission terminal according to claim 1 is characterized in that: be connected with working station indicator and indicator of the power supply status in the described condition indication circuit.
7. wireless serial data transmission terminal according to claim 1 is characterized in that: described wireless communication module is wireless receiving and transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203163166U CN201732360U (en) | 2009-12-01 | 2009-12-01 | Wireless serial port data transmission terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203163166U CN201732360U (en) | 2009-12-01 | 2009-12-01 | Wireless serial port data transmission terminal |
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| Publication Number | Publication Date |
|---|---|
| CN201732360U true CN201732360U (en) | 2011-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203163166U Expired - Lifetime CN201732360U (en) | 2009-12-01 | 2009-12-01 | Wireless serial port data transmission terminal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108257622A (en) * | 2018-03-06 | 2018-07-06 | 宁波向往智能科技有限公司 | A kind of charging management system of background music host |
| CN110706537A (en) * | 2019-10-10 | 2020-01-17 | 焦作大学 | Digital circuit training platform based on virtual chip and wireless management and application method |
| CN112650091A (en) * | 2020-09-25 | 2021-04-13 | 合肥恒烁半导体有限公司 | MCU chip interface circuit |
-
2009
- 2009-12-01 CN CN2009203163166U patent/CN201732360U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108257622A (en) * | 2018-03-06 | 2018-07-06 | 宁波向往智能科技有限公司 | A kind of charging management system of background music host |
| CN108257622B (en) * | 2018-03-06 | 2024-05-24 | 宁波向往智能科技有限公司 | Charging management system of background music host |
| CN110706537A (en) * | 2019-10-10 | 2020-01-17 | 焦作大学 | Digital circuit training platform based on virtual chip and wireless management and application method |
| CN112650091A (en) * | 2020-09-25 | 2021-04-13 | 合肥恒烁半导体有限公司 | MCU chip interface circuit |
| CN112650091B (en) * | 2020-09-25 | 2022-03-04 | 恒烁半导体(合肥)股份有限公司 | MCU chip interface circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110202 |
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| CX01 | Expiry of patent term |