Order list:

• 2PCS BLE5201 BLE Modules

1 Product Introduction

The company's BLE5201 Bluetooth data transmission module uses Bluetooth 5.2 protocol and uses Silicon Labs' EFR32BG22C224 SOC chip. It has the characteristics of low power consumption, small size, long transmission distance, and strong anti-interference ability. BLE5201 has ultra-low transmit and receive current, high-performance, low-power M33 core, which can extend the life of button batteries to ten years. Target applications include Bluetooth Mesh low-power nodes, smart door locks, personal healthcare and fitness equipment. The SOC’s Bluetooth Angle of Arrival (AoA) and Angle of Departure (AoD) functions and positioning accuracy within 1 meter will also benefit applications such as asset tracking tags, beacons, and indoor navigation. EFR32BG22C224 SOC provides IQ sampling capability, suitable for direction finding applications, and supports 125 KB and 500 KB Bluetooth Low Energy Coded PHY, which can increase the receiving sensitivity to -106 dBm. Supports applications that require direction finding or low energy Bluetooth Mesh nodes.

The BLE5201 Bluetooth data transmission module is produced and tested strictly using lead-free technology, and meets RoHS and Reach standards.

2 Chip characteristics

EFR32BG22C224 chip has rich peripheral functions, such as PWM, UART, interrupt, I2C, SPI, timer and so on. Therefore BLE5201 can also be used as a common MCU for secondary development. It has the following characteristi

• RF frequency range: 2400-2483.5MHz
• Transmitting power: up to 6dBm
• 1.71-3.8V power supply
• Ultra low power consumption static mode<5uA
• High-performance 32 Cortex®-M33 core with a maximum operating frequency of 76.8MHz
• Up to 512kB inside the chip, re-erasable Flash and 32kB RAM
• Support 2(G)FSK, OQPSK DSSS, (G)MSK

• light modulation formats

• 2 analog-digital converters (ADC): 12-bit, 1Msps; 16-bit, 76.9Ksps

• 18 general-purpose I/O pins with output state retention and asynchronous interrupt function
• 8-channel DMA controller
• 12-channel Peripheral Reflective System (PRS)
• 4 16-bit timers/counters (3 compare/capture/PWM channels)
• 32-bit real-time counter
• 24-bit low-power timer for waveform generation
• 1 watchdog timer
• 2 universal synchronous/asynchronous receivers/transmitters(UART/SPI/SmartCard(ISO 7816)/IrDA/I2S)
• 1 enhanced universal asynchronous receiver/transmitter (EUART)
• 2 I2C interfaces with SMBus support
• Digital microphone interface (PDM)
• Optional RFSENSE in OOK mode
• Chip temperature sensor with +/-1.5℃
• accuracy after single-point accuracy after single-point

Features

• Developed based on Bluetooth BLE5.2protocol
• Support single slave and one master with multiple slaves, can connect multiple slaves at the same time, up to 8 connections
• Support 2 working modes of configuration and transparent transmission
• Support over-the-air upgrade (OTA DFU)
• Support low power sleep
• Support automatic broadcasting, scanning, connection
• Support manual connection and automatic connection 2 connection methods
• Support custom 16-bit UUID, including one Service uuid and two Characteristic uuid
• Maximum transmission distance 150m (6dBm, Coded PHY)
• The maximum MTU is 247 bytes
• Support automatic binding
• Support multiple serial port parameter configuration

Application

• Wireless meter reading wireless sensor
• Smart home
• Industrial remote control, telemetry
• Smart buildings, smart buildings
• Automated data collection
• Health sensor
• Smart wearable device
• Smart robot
• Wireless sensing
• Electronic tags
• Intelligent control
• Precautions for use Precautions for use

2.1 BLE description

2.1.1 MTU

Refers to the payload size of BLE air single packet data. The MTU of the BLE4.0/4.1 protocol is 27 bytes, which can be expanded to 251 bytes from the MTU of BLE4.2 and higher. In actual use, the single packet data is MTU-3, that is, the user can send a maximum of 24 bytes using BLE4.0/4.1 protocol single packet, and BLE4.2 and higher versions can be expanded to 247 bytes. It should be noted that in actual applications, the MTU of different devices will be different.

2.2 Precautions for module application

2.2.1 Judgment conditions for the role of master and slave

When the module actively scans and connects to other Bluetooth devices, the module assumes the role of the master in this connection; when the module is connected by other Bluetooth devices due to broadcasting itself, the module acts as the slave in this connection

2.2.2 Response of distance to data transmission rate

The module uses PCB antenna. Compared with ceramic antennas, BLE wireless signals have stronger transmitting and receiving capabilities with external antennas. Nevertheless, the data transmission speed of the module will still be attenuated due to the increase in distance and the output power of the power supply.

2.2.3 Module data transmission speed changes

The time from the module's data sending to receiving will increase as the distance increases. When the module is the master, multiple slaves can be connected, and the sending data is sent in the form of polling the link number. The total sending-receiving time of the data will change due to the number of connections.

2.2.4 Precautions for using Coded PHY of the module When the module enables Coded PHY to scan/broadcast, and to send and receive data after the connection is established, compared with 1M PHY, although the transmission rate is sacrificed and the power consumption is increased, it obtains a longer transmission distance.

3. Electrical Characteristics

4. Hardware parameters

• 4.1 Internal block diagram*

4.2 Pin definition

4.3 Peripheral routing

All GPIOs of BLE5201 can be routed and mapped to use peripheral resources, and can be used as MCU to use the following functions. Note: These peripherals do not represent the functions possessed by the factory program of this module. Customers need to contact our company to customize or write their own programs to realize them.

4.4 Typical application circuit

4.5 Mechanical dimensions (unit: mm)

5. Function Description

The module supports two roles: master and slave. These three types can be modified by sending AT commands AT+ROLE. The module supports up to 8 connections, supports transparent transmission, and supports manual and automatic connections.

5.1.1 Host

• In configuration mode, send the command AT+ROLE=1 to switch to the host role, and the scan function can be used.
• In the configuration mode, send the command AT+SCAN to start scanning, which is used to manually connect to the slave
• In the transparent transmission mode, the module will automatically scan the connected slaves.
• Supports one-master and multiple-slave connections. Up to 8 connections.

5.1.1.1 Host connection strategy

The module filters broadcast packets by service UUID. UUID filtering is based on the content filtering configured by AT+UUID, and this condition cannot be closed.

The module will analyze the scanned broadcast packet during scanning. If the broadcast packet contains Service UUID and the UUID is the same as the Service UUID of the module itself, the module will automatically initiate a connection. After the connection is established, the module as the host role will try to read the Characteristic UUID under the Service UUID of the peer device. If the module does not read the Service UUID and the Characteristic UUID under it, or the UUID value read does not match the module itself, the module will automatically disconnect its connection. This filter condition applies to manual connection and automatic connection.