HC Serial Bluetooth Products User Instructional Manual
Contents
1. 3 Application circuit 2 connect to 5V serial system or PC serial Ul Figure 8 Application circuit 2 4 AT command test This chapter introduces some common commands in use The detail introduction about HC 05 command is in HC 0305 AT command set Enter to AT mode Wayl1 Supply power to module and input high level to PIN34 at the same time the module will enter to AT mode with the baud rate 38400 Way2 In the first step supply power to module In the second step input high level to PIN34 Then the module will enter to AT mode with the baud rate 9600 Wayl is recommended Command structure all command should end up with r n Hex OXOD XOA as the terminator If the serial helper is installed user just need enter ENTER key at the end of command Reset the master slave role command AT ROLE 0 Set the module to be salve mode The default mode is salve AT ROLE 1 Set the module to be master mode Set memory command AT CMODE 1 Set the module to make pair with the other random Bluetooth module Not specified address The default is this mode AT CMODE 1 Set the module to make pair with the other Bluetooth module specified address If set the module to make pair with random one first then set the module to make pair with the Bluetooth module has specified address Then the module will search the last paired module until the module is found Reset the password command AT PSWDZXXXX Set the mo2. can work at 3 0 4 2V PINI3 GND PIN31 LED 1 indicator of work mode Has 3 modes When the module is supplied power and PIN34 is input high level PIN31 output 1Hz square wave to make the LED flicker slowly It indicates that the module is at the AT mode and the baud rate is 38400 When the module is supplied power and PIN34 is input low level PIN31 output 2Hz square wave to make the LED flicker quickly It indicates the module is at the pairable mode If PIN34 is input high level then the module will enter to AT mode but the output of PIN31 is still 2Hz square wave After the pairing PIN31 output 2Hz square ware Note if PIN34 keep high level all the commands in the AT command set can be in application Otherwise if just excite PIN34 with high level but not keep only some command can be used More information has provided at chapter 2 PIN32 Output terminal Before paired it output low level Once the pair is finished it output high level PIN34 Mode switch input If it is input low level the module is at paired or communication mode If it s input high level the module will enter to AT mode Even though the module is at communication the module can enter to the AT mode if PIN34 is input high level Then it will go back to the communication mode if PIN34 is input low level again 2 Application circuit 1 connect to the 3 3V system Ul BCN KEY Figure 7 Application 1
3. similar with HC 06 Their only one difference is HC 04 is for industry HC 06 is for civil Except this they don t have difference The following reference about HC 04 and HC 06 can be downloaded from company website WWNW Wavesen com HC 06 datasheet pdf the command set introduction is included HC 04 datasheet pdf the command set introduction is included IVT BlueSoleil 2 6 IVT Bluetooth drive test version Bluetooth FAQ pdf HC 04 D HD 06 D datasheet English pdf HC 06 AT command software test version some commands in V1 5 is not supported by V1 4 PCB package of Bluetooth key modules PCB package lib in protel IVT software manual pdf introduce how to operate the modern and make pair with Bluetooth module PDA serial test helper exe serial helper used for WM system 5 manual for the first use of HC 05 This chapter will introduce how to test and use the HC 05 if it s the first time for user to operate it 1 PINS description PIN1 UART_TXD Bluetooth serial signal sending PIN can connect with MCU s RXD PIN UART_RXD Bluetooth serial signal receiving PIN can connect with the MCU s TXD PIN PIN2 there is no pull up resistor in this PIN But It needs to be added an eternal pull up resistor RESET the reset PIN of module inputting low level can reset the module when the module PIN11 is in using this PIN can connect to air PINI2 VCC voltage supply for logic the standard voltage is 3 3V and
4. HC Serial Bluetooth Products User Instructional Manual 1 Introduction HC serial Bluetooth products consist of Bluetooth serial interface module and Bluetooth adapter such as 1 Bluetooth serial interface module Industrial level HC 03 HC 04 HC 04 M HC 04 S Civil level HC 05 HC 06 HC 06 M HC 06 S HC 05 D HC 06 D with baseboard for test and evaluation 2 Bluetooth adapter HC M4 HC M6 This document mainly introduces Bluetooth serial module Bluetooth serial module is used for converting serial port to Bluetooth These modules have two modes master and slaver device The device named after even number is defined to be master or slaver when out of factory and can t be changed to the other mode But for the device named after odd number users can set the work mode master or slaver of the device by AT commands HC 04 specifically includes Master device HC 04 M M master Slave device HC 04 S S slaver The default situation of HC 04 is slave mode If you need master mode please state it clearly or place an order for HC O4 M directly The naming rule of HC 06 is same When HC 03 and HC 05 are out of factory one part of parameters are set for activating the device The work mode is not set since user can set the mode of HC 03 HC 05 as they want The main function of Bluetooth serial module is replacing the serial port line such as 1 There are two MCUs want to communicate with each other One connects to Bluetooth m
5. RT RXD of Bluetooth module has no pull up resistor If the MCU TXD doesn t have pull up function then user should add a pull up resistor to the UART RXD It may be easy to be ignored If there are two MCU which connect to master and slave device respectively then before paired LED will flicker user can send AT commands by serial port when the system is power on Please refer to HC 04 and HC 06 s data sheet for detailed commands In the last chapter the command set will be introduced Please pay attention to that the command of HC 04 HC 06 doesn t have terminator For example consider the call command sending out AT is already enough need not add the CRLF carriage return line feed If the LED is constant lighting it indicates the pairing is finished The two MCUs can communicate with each other by serial port User can think there is a serial port line between two MCUs 2 The circuit 2 connect the module to 5V serial port of MCU is showed by figure 6 Figure 6 is the block diagram of Bluetooth baseboard This kind of circuit can amplify Bluetooth module s operating voltage to 3 1 6 5V In this diagram the J1 port can not only be connected with MCU system of 3 3V and 5V but also can be connected with computer serial port v R111433 oa Ch n d UP BS e Figure 6 The circuit 2 3 AT command test Before paired the mode of HC 04 and HC 06 are AT mode On the condition of 9600N81 OK will be received when use
6. address like cell phone computer adapter slave device but also can search and make pair with the slave device automatically Typical method On some specific conditions master device and slave device can make pair with each other automatically This is the default method Pairing Master device search and make pair with the slave device automatically Typical method On some specific conditions master and slave device can make pair with each other automatically Multi device communication There is only point to point communication for modules but the adapter can communicate with multi modules Multi device communication There is only point to point communication for modules but the adapter can communicate with multi modules AT Mode 1 After power on it can enter the AT mode by triggering PIN34 with high level Then the baud rate for setting AT command is equal to the baud rate in communication for example 9600 AT mode 2 First set the PIN34 as high level or while on powering the module set the PIN34 to be high level the Baud rate used here is 38400 bps Notice All AT commands can be operated only AT Mode Before paired it is at the AT mode After paired it s at transparent communication when the PIN34 is at high level Only part of the AT commands can be used if PIN34 doesn t keep the high level after entering to the AT mode Through this kind of designing set permissio
7. angzhou HC Information Technology Co Ltd www wavesen com to download the package library of protle version TX 1 RX 2 KEY 26 LED 24 3 3v 12 GND 13 HC 06 Figure 1 TX RX 2 3 3V 12 GND 13 Figure 2 HC 05 Figure 3 Comparative picture with one coin LINVOR BLUE T www linvor com LV BC 2 0 T m gt S Z D s B 2 1 x gt E ed 5 e RTS 6 29 co PCM CLK s 3 PCM OUT PCM IN 8 am E PCM SYNC gt ne Ma o a d oa gt M a d 33v 32 3 o D T a 1415109171 D 19 20 21 1 75mm LLLLF AARARRAA 4 21 e 10 5mm 125nn 13mm NO IPIN NAME NO PIN NAME TX 20 USB D 2 RX 21 GND 3 CTS 22 GND 4 RTS 23 PLOO 5 PCM CLK 24 PIO 6 PCM OUT 25 PI02 7 PCM IN 26 P103 4 8 PCM SYNC 27 P104 9 ALOO 28 PIOS 10 AIOI 29 PIO6 11 RESET 30 PIO7 12 3 3V 31 PIOS 13 GND 32 PIOS 14 NC 33 PIOIO 15 USB D 34 PIOIL 16 CSB 1 17 MOSI 18 MISO PCB Layout iif B47 3 4g 19 CLK Figure 4 Package size information S In 4 The Using and Testing Method of HC 06 for the First Time This chapter will introduce the using method of HC 06 in detail User can test the module according to this chapter when he or she uses the module at the first time PINs description PINI UART TXD TTL CMOS level UART Data output PIN2 UART RXD TTL COMS level s UART Data input RESET the reset PIN of module inputting low lev
8. aster device while the other one connects to slave device Their connection can be built once the pair is made This Bluetooth connection is equivalently liked to a serial port line connection including RXD TXD signals And they can use the Bluetooth serial module to communicate with each other 2 When MCU has Bluetooth salve module it can communicate with Bluetooth adapter of computers and smart phones Then there is a virtual communicable serial port line between MCU and computer or smart phone 3 The Bluetooth devices in the market mostly are salve devices such as Bluetooth printer Bluetooth GPS So we can use master module to make pair and communicate with them Bluetooth Serial module s operation doesn t need drive and can communicate with the other Bluetooth device who has the serial But communication between two Bluetooth modules requires at least two conditions 1 The communication must be between master and slave 2 The password must be correct However the two conditions are not sufficient conditions There are also some other conditions basing on different device model Detailed information is provided in the following chapters In the following chapters we will repeatedly refer to Linvor s Formerly known as Guangzhou HC Information Technology Co Ltd material and photos 2 Selection of the Module The Bluetooth serial module named even number is compatible with each other The salve module is also compati
9. ble with each other In other word the function of HC 04 and HC 06 HC 03 and HC 05 are mutually compatible with each other HC 04 and HC 06 are former version that user can t reset the work mode master or slave And only a few AT commands and functions can be used like reset the name of Bluetooth only the slaver reset the password reset the baud rate and check the version number The command set of HC 03 and HC 05 are more flexible than HC 04 and HC 06 s Generally the Bluetooth of HC 03 HC 05 is recommended for the user Here are the main factory parameters of HC 05 and HC 06 Pay attention to the differences HC 05 HC 06 Master and slave mode can be switched Master and slave mode can t be switched Bluetooth name HC 05 Bluetooth name linvor Password 1234 Password 1234 Master role have no function to remember the last paired salve device It can be made paired to any slave device In other words just set AT CMODE 1 when out of factory If you want HC 05 to remember the last paired slave device address like HC 06 you can set AT CMODE 0 after paired with the other device Please refer the command set of HC 05 for the details Master role have paired memory to remember last slave device and only make pair with that device unless KEY PIN26 is triggered by high level The default connected PIN26 is low level Pairing The master device can not only make pair with the specified Bluetooth
10. dule pair password The password must be 4 bits Reset the baud rate AT UART lt Param gt lt Param2 gt lt Param3 gt More information is provided at HC 0305 command set Example AT UART 9600 0 0 set the baud rate to be 9600N81 Reset the Bluetooth name AT NAME XXXXX Summary HC 05 has many functions and covers all functions of HC 06 The above commands are the most common ones Besides this HC 05 leaves lots of space for user So HC 05 is better than HC 06 and recommended HC 03 is similar with HC 05 The above introduction also suits HC 03 The following reference about HC 03 and HC 05 can be downloaded from company website WWNW Wavesen com HC 03 datasheet pdf the command set introduction is included HC 05 datasheet pdf the command set introduction is included IVT BlueSoleil 2 6 IVT Bluetooth drive test version Bluetooth FAQ pdf PCB package of Bluetooth key modules PCB package lib in protel IVT software manual pdf introduce how to operate the modern and make pair with Bluetooth module PDA serial test helper exe serial helper used for WM system HC 03 05 Bluetooth serial command set pdf 6 Ordering information The website of Guangzhou HC Information Technology Co Ltd is www wavesen com The contact information is provided at the company website Order Way If you want our product you can give order to the production center of our company directly or order it in Taobao There is a link
11. el can reset the module ia when the module is in using this PIN can connect to air VCC voltage supply for logic the standard voltage is 3 3V and can work PIN12 at 3 0 4 2V PINI3 GND PIN22 GND LED working mode indicator Slave device Before paired this PIN outputs the period of 102ms square wave After paired this PIN outputs high level Master device On the condition of having no memory of pairing with a Ed slave device this PIN outputs the period of 110ms square wave On the condition of having the memory of pairing with a slave device this PIN outputs the period of 750ms square wave After paired this PIN outputs high level For master device this PIN is used for emptying information about pairing After emptying master device will search slaver randomly then 2 remember the address of the new got slave device In the next power on master device will only search this address 1 The circuit 1 connect the module to 3 3V serial port of MCU is showed by figure 5 UART TAD UART_RED EET Figure 5 The circuit 1 In principle HC 06 can work when UART TXD UART RXD VCC and GND are connected However for better testing results connecting LED and KEY are recommended when testing the master Where the 3 3V TXD of MCU connects to HC 06 s UART RXD the 3 32 V RXD of MCU connects to HC 06 s UART_TXD and 3 3V power and GND should be connected Then the minimum system is finished Note that the PINZ UA
12. er device will make pair with the slave device automatically in the first use In the following use the master device will remember the Bluetooth address of the last paired device and search it The searching won t stop until the device is found If master device s PIN26 is input high level the device will lose the memory In that occasion it ll search the proper slave device like the first use Based on this function the master device can be set to make pair with the specified address or any address by user 6 Reset new password introduction User can set a new password for the HC 06 through AT PINxxxx command But the new password will become active after discharged all the energy of the module If the module still has any energy the old one is still active In the test for discharging all the system energy and activating the new password we can connect the power supply PIN with GND about 20 seconds after the power is cut off Generally shutting down the device for 30 minutes also can discharge the energy if there is no peripheral circuit helps discharge energy User should make the proper way according to the specific situation 7 Name introduction If the device has no name it s better that user doesn t try to change the master device name The name should be limited in 20 characters Summary The character of HC 06 1 not many command 2 easy for application 3 low price It s good for some specific application HC 04 is very
13. ns for the module is left to the user s external control circuit that makes the application of HC 05 is very flexible During the process of communication the module can enter to AT mode by setting PIN34 to be high level By releasing PIN34 the module can go back to communication mode in which user can inquire some information dynamically For example to inquire the pairing is finished or not Default baud rate communication 9600 4800 1 3M are settable During the communication mode the module can t enter to the AT mode Default communication baud rate 9600 1200 1 3M are settable KEY PIN34 for entering to the AT mode KEY PIN26 for master abandons memory LED PIN31 indicator of Bluetooth mode Slow flicker 1Hz represents entering to the AT mode2 while fast flicker 2Hz represents entering to the AT model or during the communication pairing Double flicker per second represents pairing is finished the module is communicable LED2 PIN32 before pairing is at low level after the pairing is at high level The using method of master and slaver s indicator is the same Notice The PIN of LED1 and LED2 are connected with LED LED The flicker frequency of slave device is 102ms If master device already has the memory of slave device the flicker frequency during the pairing is 110ms s If not or master has emptied the memory then the flicker frequency is 750m s After pairing no mat
14. r send the two letters AT Please refer to the last chapter of datasheet for other commands of HC 06 Please pay attention to that sending out AT is already enough need not add the CRLF carriage return line feed The command set of Version V1 4 doesn t include parity The version V1 5 and its later version have parity function Moreover there are three more commands of V1 5 than V 1 4 They are No parity default AT PN Odd parity AT PO Even parity AT PE Do not let the sending frequency of AT command of HC 06 exceed 1Hz because the command of HC 06 end or not is determined by the time interval 4 Pairing with adapter User can refer to the download center of the company s website for The Introduction of IVT that introduces the Bluetooth module makes pair with computer adapter That document taking HC 06 D for example introduces how the serial module makes pair with the adapter That method is like to make pair with cell phone But the difference is that cell phone need a third party communication software to help It s liked the kind of PC serial helper of and the hyper terminal A software named PDA serial helper provided by our company is suitable for WM system It has been proven that this serial module is supported by many smart phone systems Bluetooth such as sybian android windows mobile and etc 5 Pairing introduction HC 06 master device has no memory before the first use If the password is correct the mat
15. ter it s a master or slave device the LED PIN is at high level Notice The LED PIN connects to LED PIN Consumption During the pairing the current is Consumption During the pairing the current is fluctuant in the range of 30 40mA The mean current is about 25mA After paring no matter processing communication or not the current is 8mA There is no sleep mode This parameter is same for all the Bluetooth modules Reset PIN11 active if it s input low level It can be suspended in using fluctuant in the range of 30 40 m The mean current is about 25mA After paring no matter processing communication or not the current is 8mA There is no sleep mode This parameter is same for all the Bluetooth modules Reset PIN11 active if it s input low level It can be suspended in using Level Civil Level Civil The table above that includes main parameters of two serial modules is a reference for user selection HC 03 HC 05 serial product is recommended 3 Information of Package The PIN definitions of HC 03 HC 04 HC 05 and HC 06 are kind of different but the package size is the same 28mm 15mm 2 35mm The following figure 1 is a picture of HC 06 and its main PINs Figure 2 is a picture of HC 05 and its main PINs Figure 3 is a comparative picture with one coin Figure 4 is their package size information When user designs the circuit you can visit the website of Gu
16. to Taobao in our company website Package 50 pieces chips in an anti static blister package The weight of a module is about 0 9g The weight of a package is about 50g Please provide the product s model when you order HC 04 M HC 04 master module HC 04 S HC 04 slave module HC 06 M HC 06 master module HC 06 S HC 06 slave module HC 03 HC 05 HC 03 05 can be preset to be master module or slave module
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