Dongguan DALY Electronics Co., LTD Master-slave integrated Bluetooth transmission transmission module user manual DL-B40-D Version: V1.6 Date of modification: 2021-11-25 1 guide catalogue users Terology, noun interpretation...........................................................................................................4 1 Introduction of product functions................................................................................................5 2 Pound definition...................................................................................................................................6 3 Typical application circuit................................................................................................................ 8 4. Basic function description..............................................................................................................9 4.1 Transmission principle.............................................................................................................. 9 4.2 Module operating mode (transmission and AT command mode)................................. 10 4.3 Description of the input and output pin function...........................................................10 4.4 Bluetooth Device Role and Connections........................................................................... 11 5 A Quick Start Guide......................................................................................................................... 12 5.1 Commissioning bottom plate for testing........................................................................... 12 5.2 Quickly verify the bluetooth serial port transtransmission function...........................12 6 Low-power sleep function is used............................................................................................ 1 4 7AT command....................................................................................................................................... 15 7.1AT instruction format description......................................................................................... 15 7.2AT instruction list and description........................................................................................ 16 8 Wireless setup and queries via Bluetooth...............................................................................19 9OTA function....................................................................................................................................... 19 10. Product specifications................................................................................................................. 20 1 1 Revision record.............................................................................................................................. 20 2 guide Chart index users Table 1 Interpretation table of term names.................................................................................................4 Table 2 The pin definition table.........................................................................................................................7 Table 3 Description of input and output pins..........................................................................................10 Table 4 UUID......................................................................................................................................................... 11 Table 5 List of configuration items to reduce power consumption...............................................1 4 Table 6 List and description of AT commands....................................................................................... 19 Figure 1. A Schematic diagram of the pin position..................................................................................... 6 Figure 2 Basic minimum circuit (low able low function sleep function)..........................................8 Figure 3 Base basic minimum circuit (disable low power sleep function)......................................8 Figure 4 Schematic diagram of one-to-one Bluetooth connection transtransmission function..................................................................................................................................................................... 9 Figure 5 Schematic diagram of the multi-to-one Bluetooth connection through transmission function...........................................................................................................................................9 Figure 6. Schematic diagram of the conversion logic of the transmission mode and AT command mode................................................................................................................................................... 10 Figure 7 Schematic diagram of the appearance and function of the module test floor plate.......................................................................................................................................................................... 12 Figure 8 Figure of the measured tool of transmission test................................................................13 Figure 9 Data measurement of serial port and APP............................................................................. 13 Figure 10 Control and state timing after the low-power consumption function is turned on
....................................................................................................................................................................................1 4 3 guide Terology, noun interpretation users explanation Transparent transmission, forwarding data between Bluetooth and serial port name unvarnish ed transmissi on PDA Bluetooth, A short-distance wireless communication technology BLE GATT Bluetooth LowEnergy, Low power Bluetooth, a new Bluetooth technology specification, lower power consumption, farther transmission distance and communication distance Low-power Bluetooth (BLE) connections are built on the GATT
(Generic AttributeProfile) protocol, and are a general specification for sending and receiving data over Bluetooth connections Bluetooth host One of the device roles in the Bluetooth connection, the host scans the slave device and actively initiates the connection to the slave device, playing its leading role in the Bluetooth connection Bluetooth from the machine One of the device roles in the Bluetooth connection, from the machine to broadcast its own information, passively waiting for the connection Bluetooth radio The Bluetooth transmitting device sends a broadcast periodically, so that the surrounding host device can scan and recognize itself, and the host device can connect to the slave according to the scanned slave information Broadcast interval The interval when Bluetooth sends the broadcast from the device, the smaller the interval, the faster it is scanned, but the greater the power consumption, the smaller the power consumption Connection interval After the two Bluetooth devices are connected, the beat of the data transmission, the smaller the interval, the faster the transmission speed, the smaller the delay, but the greater the power consumption Paired binding A mechanism of communication security in Bluetooth technology realizes the security of Bluetooth link layer 4 guide OTA Aerial upgrade, or the firmware of the wireless upgrade module via Bluetooth users Heavy connection interval When the module is the host, when the Bluetooth connection is not connected or disconnected, the interval will automatically reconnect Table 1 Interpretation table of term names 5 guide 1 Introduction of product functions DL-B40-D is a BLE 5.1 master-slave integrated Bluetooth-serial port through transmission module developed and produced by Lithium Electronics. Various devices with serial ports can easily and quickly use Bluetooth wireless data through this module. users The basic functions and features are described as follows:
Main frequency is 48 MHz, with a 32-bit ARM Cortex M3 core Fast and stable Bluetooth-serial port transmission, serial port port rate up to 921600 Master-slave all-in-one Bluetooth, can be set to host or slave mode, support binding encryption Bluetooth slave mode can be connected by up to 20 host devices at the same time, and supports custom broadcast data Based on BLE 5.1, the speed is faster, the transmission distance is farther, and it can reach 40~100m in the open environment Support low power mode, dormant current up to 6 A, custom connections and broadcast intervals The Bluetooth transmission power is adjustable, up to 10 dBm, and the reception sensitivity is up to-95 dBm Support OTA Bluetooth wireless upgrade module firmware, wireless configuration module parameters The default onboard high quality ceramic antenna, improve the transmission distance, can also choose external antenna Built-in Watchdog, long time and reliable operation Ultra-small size, only 14mm9.5mm 2mm Wide operating voltage of 1.8~4.2V, with a typical value of 3.3V Rich output pins (UART, I2C, SPI, up to 15 GPIO, up to 4 ADC, up to 6 PWM), available For flexible and in-depth hardware and software customization development services 6 guide 2 Pound definition users Figure 1. A Schematic diagram of the pin position pin symbol IO class function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 GND GND Power to MIC_BIAS MIC_ IN VMID AOUT_P AOUT_N RESET
I Keep function Keep function Keep function Keep function Keep function Reset restart module, high level effective, not suspended, need external 10K pull-down resistance VCHG PWR Charger input, no use without battery supply VBAT GND VDDIO PD 7 PD 6 PD 5 PD 4 PWR Power input DC3.3V, battery power supply GND Power to
Keep function Keep function Keep function Keep function Keep function 7 guide pin 16 17 18 19 20 21 22 23 24 25 26 27 28 29 symbol IO class function PC 7 O Module hibernation state output, high level: full speed work, low level: sleep users PC 6 PC 5 PA 3 PA 2 PA 1 PA 0 UART0_ TXD UART0_ RXD PA 4 PA 5 LED GND ANT I I
O I O O
Module hibernation control input High level: enter dormancy, low level: exit dormancy, suspended for high level Function key input, the low level is effective, suspended for the high level Keep function Keep function Keep function Keep function Block serial port output Module serial port input Bluetooth connection status output, high level: not connected, low level: connected Current working mode output, high level: host, low level:
slave Keep function GND Power to External antenna output Table 2 A pin definition table 8 guide 3 Typical application circuit The following is the basic application circuit reference for this module. For more functions, please refer to the module operation manual, or contact our engineer for assistance. users Figure 2 Basic minimum circuit (low able low function sleep function) The enabling and disabling of the module can be set by AT command and is disabled by default. If the low-power hibernation function is enabled, the module is controlled by the level of the hibernation control input pin, which can enter the hibernation or exit the hibernation, and the module will output the current hibernation state through the hibernation state output pin. Figure 3 Basic minimum circuit (enabling low-power sleep matters need attention:
function) 9 guide users 1. The RESET pin should not be suspended, and the 10K pull-down resistance should be connected. 2. Metal object occlusion will affect the Bluetooth signal sending and receiving, so the module should be kept away from the metal objects as possible when using. PCB design requires that the antenna part of the module should be hollowed out without copper. 10 users guide 4. Basic function description 4.1 Transmission principle HL RK-B40 is a lithium electronic cost-effective from integrated low power Bluetooth-
serial port through transmission module, is designed to make only serial users can quickly simple use bluetooth wireless transmission, with the help of serial through transmission, the users products need not care about complex bluetooth protocol stack and RF circuit, only simple serial send and receive, can transmit data directly on the bluetooth wireless connection. Through transmission is short for transparent transmission, namely the role of the module is equivalent to between the serial and bluetooth connection to establish a transparent transmission pipeline, the user in the serial port data to the original to the bluetooth connection, via bluetooth data from the original to the serial, the whole process users do not need to care about how to achieve complex bluetooth connection, and HARK-B40 module is the original data handling forward and not to resolve and process the user transmission data, the user can safe and convenient use of the ability. The schematic diagram of Bluetooth-serial port transtransmission function is as follows. See the <5 Quick Start Guide. Figure 4 Schematic diagram of one-to-one Bluetooth connection transtransmission function When acting as a Bluetooth slave machine, the module can be connected by multiple Bluetooth host devices, and also include other B40 modules as a host machine. With the many-to-one connection, the data received from the serial port of the machine module will be forwarded to each connected host device via Bluetooth, and the data sent from each connected host device will also be forwarded to the serial port of the slave module. 11 guide users Figure 5 Schematic diagram of the multi-to-one Bluetooth connection through transmission function 12 guide 4.2 Module operating mode (transmission and AT command mode) The DL-B40-D module has two working states: through transmission mode and AT command mode. users In AT command mode, you can send AT commands to the module through the serial port to query and set the parameters of the module. In transmission mode, the module will transmit the serial port data and Bluetooth connected data bidirectional. When the module is started, by default. Entering the AT mode will not affect the Bluetooth connection status. The data transmission of the serial port-Bluetooth is suspended; the data received by the serial port is processed by the current AT command;
the data transmission is continued after the transmission is restored. In transmission mode, input the 18th pin PC5 for a short low level (0.5 ~3s), and the module will exit transmission and switch to AT command mode. In AT command mode, send AT + TS=1 command to restore exit AT command mode to transmission mode. The conversion logic of transmission mode and AT command mode is shown below:
Figure 6. Schematic diagram of the conversion logic of the transmission mode and AT command mode 4.3 Description of the input and output pin function name Chip pin explain Reset key input RESET The high level is effective, and the external 10K pull-down resistance is input to the high level module restart module Function button input PC5 The interior has been pulled up, pull down the action Pull down 0.5~3 seconds: exit the transmission and switch to AT command mode; pull down 8~20 seconds: restore factory default settings 13 guide Module hibernation control input Module hibernation state output users The internal has been pulled up, suspended PC6 or input high level module automatically into the dormant state, input low level normal work at full speed;
Effective only when the low-power sleep function is enabled PC7 High level = full speed work, low level = dormant Bluetooth connection status output PA4 High level = unconnected, low level = connected, and the transmission channel is established; when the pairing binding function is enabled, the pairing encryption is successful Work mode output PA5 High level = host, low level = slave Table 3 Description of input and output pins 14 users guide 4.4 Bluetooth Device Role and Connections Devices at both ends of the Bluetooth connection have fixed roles, always one is the host role and one is the slave role. The equipment of the different roles specifies the corresponding operations and responsibilities. The host scans the slave device through the slave broadcast, and actively initiates and maintains a connection to the selected slave device (identified by the MAC address), playing a leading role in a Bluetooth connection. The slave broadcasts its own information, such as the device name, the slave passively waits for the connection request initiated by the host, and accepts the request to make the Bluetooth connection successfully established. This module can be connected by multiple host devices at the same time. The B40 module defaults to the slave mode and can be switched by the AT + ROLE command. After establishing Bluetooth connection, both devices can send data through Bluetooth (GATT). The Bluetooth GATT service and feature UUID of this module can be modified by AT command, setting the read and write feature UUID value to the same, that is, sending and receiving on one feature simultaneously. The default values are as follows:
Service UUID: 0000 fff 0-0000-1000-8000-00805f9b34 fb fe a t u r e UU I D Operation permissions function definition 0000 fff1-0000-1000-8000-00805f9 b34 fb Read/Notify 0000 fff2-0000-1000-8000-00805f9 b34 fb Write Without Response Module delivery, APP receiving APP, module receive Table 4 UUID You can choose to open the pairing binding function of Bluetooth connection, which can increase the security, but the operation steps are increased accordingly. It is effective in both slave or host mode. The pairing mode is PASSKEY ENTRY, 6-digit PingCode. After the binding function is turned on, the Bluetooth data can be sent and received by pairing. The unpaired device cannot transmit data through Bluetooth and module. In host mode, it is necessary to set the MAC address of the destination to be connected. When the module is started, the target is automatically connected without the connection is disconnected. The interval of automatic reconnection can be set by AT + RECONNI command. The default is 5s, which is to reconnect every 5 seconds until the connection. 15 guide 5 A Quick Start Guide users 5.1 Commissioning bottom plate for testing In order to enable users to quickly start the verification and debugging of the module, our company has developed a special B40 test floor, which recommends you to choose this test floor when using this module for the first time. The test floor is directly powered by USB, with USB serial port function. After connecting to the computer through USB cable, you can connect the serial port of the module on the module through USB serial port, without additional serial connection, which is easy to use. Figure 7 Schematic diagram of the appearance and function of the module test floor plate 5.2 Quick verify of Bluetooth serial port transmission function Our company has developed a special mobile phone Bluetooth transtransmission test APP for this module for users to use. Please refer to the DL-B40-D Bluetooth Transmission module APP. Using the module test floor and the mobile phone Bluetooth transtransmission test APP, you can immediately test the serial port-Bluetooth transtransmission function of the verification module. The specific test operation procedure is as follows:
Correct the module to the test base and connect the test base to the computer via USB cable. Open the corresponding serial port on the computer with the serial port debugging tool. 16 guide Open the transmission test APP on the phone, the APP will automatically search the surrounding Bluetooth devices and display the list. users Click the Bluetooth device name corresponding to the module in the device list to connect. The default name of the B40 module is HLK _ B 40 _ * * * *, and the suffix is the last four digits of the MAC address. 17 guide users Figure 8 Figure of the measured tool of transmission test After the APP is successfully connected to the module, the connection state LED on the test floor will brighten, which is the connected state. At this time, data can be sent to the module serial port in the serial port debugging tool on the computer, and the sent content will be received and displayed by the mobile phone APP intact;
Send data to the module from the transtransmission test APP on the mobile phone, and the sent content will be received by the module and output to the module serial port. The received data can be seen in the serial port debugging tool on the computer. The effect is as follows:
Module serial port mobile phone APP terminal Figure 9 Data measurement of serial port and APP 18 guide 6 Low-power sleep function is used This module is developed based on BLE 5.1 technology, supports low power consumption, and can be flexibly configured in many ways to further reduce power consumption. Configurable items explain Adjust the emission power The lower the transmission power, the lower the power consumption, but the shorter the transmission distance users Adjust the broadcast intervals and the connection intervals Turn on automatic dormancy The larger the interval, the lower the power consumption, but the greater the delay After the automatic hibernation function is turned on, the module can be controlled by the input level of the input pin of the external hibernation control. High level: the main chip automatically hibernation, low level: wake up at full speed;
The lowest operating current during dormancy can be as low as 6 A Table 5 List of configuration items to reduce power consumption All of the above can be modified by AT commands, and users can be flexibly set according to the actual application scenarios and requirements, to achieve a balance between power consumption and performance. After the automatic sleep function is enabled, the dormant state output pin output different levels to indicate whether the module is currently in dormant state or awake state: high level: wake up, full speed working state; low level: dormant state 19 guide users Figure 10 Control and state timing after the low-power consumption function is turned on 20 users guide 7 AT command 7.1AT instruction format description All AT instructions are in ASCII code string format, and the instructions end with a return line character. No power loss after setting, all settings will take effect after the restart. Query class instruction:
transmit by radio reply AT+< CMD>=?\r\n Set class instructions:
transmit by radio AT+< CMD>=< val>\r\n
\ r \ n represents the ASCII code: 0x0D 0x0A Query success:
AT+< CMD>=<
val>\r\n OK\r\n Or if the query fails:
AT+< CMD>=<
val>\r\n ERROR\r\n reply Setup success:
AT+< CMD>=<
val>\r\n OK\r\n Or if the setting fails:
AT+< CMD>=<
val>\r\n ERROR\r\n 21 guide 7.2AT instruction list and description num ber command name explain Example of parameter range users 1 2 3 4 5 VER MAC read only Software version number MAC address read only DEFAULT Restore the default configuration REBOOT Restart module TS Recovery through transmission mode 1 1 1 6 NAME module Bluetooth name Up to 25 characters each Default value: HLK _ B 40 _****
transmit by radio reply AT+ VER=?
AT+ VER=1.03(20092421) OK transmit by radio reply AT+ MAC=?
AT+ MAC=112233445501 OK transmit by radio reply AT+ DEFAULT=1 AT+ DEFAULT=1 OK transmit by radio reply AT+ REBOOT=1 AT+ REBOOT=1 OK transmit by radio reply AT+ TS=1 AT+ TS=1 OK transmit by radio reply AT+ NAME=?
AT+ NAME= HLK_B40 OK transmit by radio reply AT+ NAME= ble_1234 AT+ NAME= ble_1234 OK transmit by radio reply 1200,2400,4800,9600,14 AT+ BAND=?
7 BAND Serial port port rate 400,19200,38400,576 00, 115200,230400,460800, 921600 Default value: 115200 8 RFPOWER PDA transmitting power 1 ~18,18 grades Default: 8 The smaller the AT+ BAND=115200 OK transmit by radio reply AT+ BAND=230400 AT+ BAND=230400 OK transmit by radio reply AT+ RFPOWER=?
AT+ RFPOWER=8 OK transmit by radio reply transmission distance, AT+ RFPOWER=10 AT+ RFPOWER=10 OK the lower the power consumption; the larger the transmission distance Far away, the greater the power consumption 22 9 SLEEPEN transmit by radio reply AT+ SLEEPEN=?
AT+ SLEEPEN=0 OK transmit by radio reply AT+ SLEEPEN=1 AT+ SLEEPEN=1 OK 0 disables sleep 1 enables sleep Automa Default: 0 tic dorma ncy enabli ng The enabling module automatically enters the dormant state according to the control of the SleepEn input pin level 23 guide 63200 transmit by radio reply users 10 CONNI PDA Connection interval Unit of 1.25ms, namely 7.5~
4000ms, the default value:
12 The smaller the send and receive, the faster the power consumption Large; the larger the slower, the greater the delay, the lower the power consumption;
11 ADVI Unit 625us recomme nded PDA Broadcast interval value:
80,160,320,800, 1600,3200 Default value: 800 AT+ CONNI=?
AT+ CONNI=24 OK transmit by radio reply AT+ CONNI=8 AT+ CONNI=8 OK transmit by radio reply AT+ ADVI=?
AT+ ADVI=800 OK transmit by radio reply AT+ ADVI=1600 AT+ ADVI=1600 OK 12 ADVDATA Custo characters is a multiple transmit by radio reply 16 bases, the number of AT+ADVDATA=?
AT+ADVDATA=03FF1A1B OK transmit by radio reply 13 ROLE 14 ENCRYPT of 2, up to 5216 bases Default: No AT+ADVDATA=68696C696E6B AT+ADVDATA=68696C696E6B OK 1 From the machine 2 Host Default: 1 transmit by radio reply AT+ ROLE=?
AT+ ROLE=1 OK transmit by radio reply AT+ ROLE=2 AT+ ROLE=2 OK 0 No pairing binding is required 1 requires paired binding Default: 0 transmit by radio reply AT+ ENCRYPT=?
AT+ ENCRYPT=0 OK transmit by radio reply AT+ ENCRYPT=1 AT+ ENCRYPT=1 OK m broadca st data The BLE role of the modul e Paired bindin g enabl es 15 Paired Six-digit integers 24 transmit by radio reply AT+ PINCODE=?
AT+ PINCODE=000000 OK transmit by radio reply PINCODE code Default value: 000000 AT+ PINCODE=123456 AT+ PINCODE=123456 OK 16 SCANMODE Connect to the scan mode in the host mode 0 Connect via the MAC address 1 Connect via a Bluetooth name Default: 0 transmit by radio reply AT+ SCANMODE=?
AT+ SCANMODE=0 OK transmit by radio reply AT+ SCANMODE=1 AT+ SCANMODE=1 OK 25 users transmit by radio reply AT+PEERMAC=?
AT+ PEERMAC= AABBCC 000001 OK MAC address, 1216 bases transmit by radio reply AT+ PEERMAC= AABBCC 000001 AT+ PEERMAC= AABBCC 000001 OK transmit by radio reply AT+ PEERNAME=?
AT+ PEERNAME= HLK_B40 OK Up to 25 characters each transmit by radio reply AT+ PEERNAME= ble_1 AT+ PEERNAME= ble_1234 234 OK guide 17 PEERMAC 18 PEERNAME 19 AUTHPWG Module as host When, automatic go to connect Receive from the machine MAC address Module as host When, automatic go to connect The blue of the machine The tooth name OTA and air-
configured access passwords Up to 8 characters Default value: Hi Link transmit by radio reply AT+AUTHPWG=?
AT+AUTHPWG=HiLink OK transmit by radio reply AT+ AUTHPWG=68686868 AT+ AUTHPWG=68686868 OK transmit by radio reply AT+ CONNSTATE=?
AT+ CONNSTATE=2 M,4E21 FB 831492 M,539 FD 7108A6D OK CONNSTATE 20 Query current Bluetooth Connected device letter breath Read only Responses will include:
The number of devices currently connected Role, MAC for each device Integer, in a unit of s transmit by radio reply 21 RECONNI 22 UUIDS Module as host When, the Bluetooth is automatically Heavy connection interval 0: Try to connect once on startup only, and do not reconnect 1~60: Automatic reconnect after specified seconds after the connection is disconnected Default: 5 3216 decimal numbers Windows default:
Bluetooth transmis 0000 fff sion 00000100080 26 AT+RECONNI=?
AT+RECONNI=0 OK transmit by radio reply AT+ RECONNI=10 AT+ RECONNI=10 OK transmit by radio reply AT+ UUIDS=?
AT+ UUIDS=0000 fff 00000100080 0000805f9b34 fb OK transmit by radio reply AT+ UUIDS=0000 fff 000001000 AT+ UUIDS=0000 fff 00000100080 800000805f9b34 fb 0000805f9b34 fb OK 23 UUIDR service UUID Through the transmission service Read feature UUID(module Send, APP receiving) 0000805f9b34 fb 3216 decimal numbers Windows default:
0000 fff 10000100080 0000805f9b34 fb 27 users 32 in 16 decimal points Windows default:
0000 fff 20000100080 0000805f9b34 fb 1 transmit by radio reply AT+ DISCONN=1 AT+ DISCONN=1 OK transmit by radio reply AT+ ADVEN=?
AT+ ADVEN=0 OK transmit by radio reply AT+ ADVEN=1 AT+ ADVEN=1 OK 0 Disable the Bluetooth broadcasting of the module 1 The Bluetooth broadcast of the enabling module Default: 1 When disabled, the module cannot be scanned by the phone or other Bluetooth host transmit by radio reply AT+MAXCONN=?
AT+MAXCONN=20 OK Default value 10 transmit by radio reply AT+MAXCONN=2 AT+MAXCONN=2 OK guide 24 UUIDW 25 DISCONN Through the transmission service Write feature UUID APP Issue, module receiving) Proactively disconnect the current And all of the modules bluetooth connection 26 ADVEN Module 27 MAXCONN Bluetoo th broadca st is enabled From machine mode When, allow the most Large Bluetooth connection Number, or the most available How many at the same time Host connection Table 6 List and description of AT commands 8 Wireless setup and queries via Bluetooth In the mobile phone APP, the parameters of the module can be checked and set through Bluetooth wireless. For specific operation, please refer to DL-B40-D Bluetooth Transmission Module Mobile Phone APP Use Instructions. 28 9 The OTA function In the mobile phone APP, the firmware of the module can be upgraded through Bluetooth. For specific operation, please refer to DL-B40-D Bluetooth Transmission Module APP Use Instructions. 10 In t r o d u c t i o n of th e fi n i s h e d p r o d u c t s 29 Description of the Bluetooth cable interface definition grade GND 3.3V
TX RX Wire harness color black hispid GH 1.25 arthraxon color and definition Micro USB Colors and definition s empty yellow white red red white hispid arthraxon yellow black The pin definition PiN foot GND Power supply is 3.3V
Communication sending end Communication receiver 1 2 3 4 5 6 1 2 3 4 5 30 1 Revision record date edition revise content 2020-10-12 1.0 The initial version 2020-10-20 1.1 Correct part of the data, add the reconnection interval description reconnection interval default value to 5 2020-10-31 1.2 Support for BLE 5.1 2020-11-5 1.3 Improve some text 2021-1-13 1.4 Add scan connection mode in host mode through MAC address or Bluetooth name 2021-7-26 1.5 enable, and maximum Bluetooth Add active disconnect, Bluetooth broadcast 2021-11-25 1.6 connections in slave mode;
Correct the length of the Bluetooth name and the length range of the custom broadcast data;
Correct the length limit of Bluetooth name; improve some text description;
Modify the default connection interval;
31 FCC Statement 1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1)This device may not cause harmful interference.
(2)This device must accept any interference received, including interference that may cause undesired operation. 2. Changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. Note:This equipment has been tested and found to comply with the limits for a class B digital device,pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and,if not installed and used in accordance with the instructions,may cause harmful interference to radio communications.However,there is no guarantee that interference will not occur in a particular installation.if this equipment does cause harmful interference to radio or television reception,which can be determined by turning the equipment off and on,the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. The device has been evaluated to meet general RF exposure requirement,This equipment should be installed and operated with a minimum distance of 20 cm between the radiator and your body ISED Statement This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas licence-exempt RSS(s). Operation is subject to the following two conditions:
1. This device may not cause interference. 2. This device must accept any interference, including interference that may cause undesired operation of the device. This equipment should be installed and operated with a minimum distance of 20 cm between the radiator and your body. L'metteur/rcepteur exempt de licence contenu dans le prsent appareil est conforme aux CNR d'innovation, sciences et Dveloppement conomique Canada applicables aux appareils radio exempts de licence, L'exploitation est autorisee auxdeux conditions suiva ntes:
1. Lappareil ne doit pas produire de brouillage;
2. L'appareil doit accepter tout brouilage radiolectrique subi, mme si le brouillage est s usceptible d'en compromettre lefonctionnement. Cet quipement doit tre install et utilis avec une distance minimale de 20 cm entre le radiateur et votre corps. 32
