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Methods Of Selecting BLE Module

By sdga:NiceRF Wireless Technology Co., Ltd

NiceRF: What is low energy Bluetooth and how to choose a BLE module?

Bluetooth Low Energy(BLE), also known as smart Bluetooth, has evolved from the Bluetooth 4.0 to the current Bluetooth 5.2. Before being adopted by Bluetooth SIG, it was a short-range wireless communication technology designed by Nokia. Its original aim was to provide a wireless standard with the lowest power consumption, and specifically optimize low cost, low bandwidth, low power consumption and low complexity. BLE has gradually become a low-power standard for semiconductor manufacturers and low-power Bluetooth and low-cost practical application design. At present, low-power Bluetooth technology has been widely used. It can run for a long time with only one button battery. So how to choose a BLE module?

 

Method of selecting BLE module:

1. Transmission rate

Transmission rate is usually the first consideration for engineers due to it is related to the type of information transmitted. Therefore, when selecting the BLE module, the application must be clear, and the data transmission rate required in the working state must be taken as the selection standard.

 

2. BLE module Transmission Distance

Transmission distance is also an important consideration when selecting BLE module. The farther the distance, the better of the BLE module. According to the distance in the practical application, determine which BLE module can better meet the data transmission requirements.

 

3. Power consumption

Power consumption is mainly determined by transmission rate and distance. Generally, Bluetooth devices are powered by batteries, and the power consumption directly determines the endurance of the product. Bluetooth module itself is famous for its low power consumption. Nevertheless, due to it has a variety of working states, the power consumption value in each state is different, which needs to be determined by engineers according to the actual application.

 

4. BLE module Chip

The chip determines the computing capability of the BLE module. Without a powerful core, the performance of the BLE module cannot be guaranteed.

 

5. BLE module Interface

The interface of BLE module is optional. There are serial, USB, digital I / O port, analog I / O port, SPI and voice interface. For data transmission, serial interface (TTL level) can be used.

 

6. Working mode

BLE Bluetooth has different working mode. They are master, slave, master-slave coexistence / master-slave connection. Generally, one master can communicate with multi- slaves and support point-to-point communication.

 

To help customers make better choices, NiceRF has listed the BLE modules of various versions:

NiceRF BLE moduleBLE module BLE5101BLE module BLE5201BLE module RF2541BLE module RF2541-PL2
 BLE module BLE5101BLE module BLE5201BLE module RF2541BLE module RF2541-PL2
CertificationsFCC、CE、BQBThe module can pass various certificationsThe module can pass various certificationsThe module can pass various certifications
Bluetooth communication protocolBLE 5.1BLE 5.2BLE 4.0BLE 4.0
ChipFR8012HAEFR32BG22CC2541 SOC chip from TICC2541 SOC chip from TI
Operating frequency band2.4GHz2.4GHz2.4GHz2.4GHz
Communication distance150m(1Mbps、10dBm)150m(1Mbps、Coded PHY)50m50m
Master & slave rolesThe master and slave coexist, and the master and slave can be connected at the same timeThe master-slave roles cannot coexist. The master and slave can only choose one from the otherThe master and slave can only choose one from the other  The master and slave can only choose one from the other  
MAC address modificationCustomizable and modifiableCannot modifyCannot modifyCannot modify
Transmission rate2Mbps2Mbps1Mbps1Mbps
Maximum number of Bluetooth connections20811
Power range-16dBm~10dBm0dBm~6dBm-20dBm~0dBm-20dBm~0dBm
Sleep current< 7.5uA< 5uA1.5~2uA< 1uA
Air upgradeAvailableAvailablenot availableAvailable
Startup initial modeConfiguration mode (can be modified by command configuration)Transparent transmission mode. After connection, transparent transmission of data can be started.Transparent transmission mode. After connection, transparent transmission of data can be started.Transparent transmission mode. After connection, transparent transmission of data can be started.
MTU (maximum bytes per packet)247 bytes247 bytes20 bytes20 bytes
AntennaPCB onboard antennaPCB onboard antennaPCB antennaWire
Serial baud rate range2400~ 115200bps2400~ 115200bps1200~ 115200bps1200~ 115200bps
Debug serial portyesnonono
Auto initiate bindingnoyesnono
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