TI CC2541 Bluetooth low energy module WJ-M101

TI CC2541 Bluetooth low energy module WJ-M101

Chipset: TI CC2541

Transmit distance: 30m

Dimension: 15.2*25.3*2.0 mm

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WJ-M101 BT low energy single mode module is a single mode device targeted for low power sensors and accessories.
It offers all BT low energy features: radio, stack, profiles and application space for customer applications. The module also provides flexible hardware interfaces to connect sensors.
It can be powered directly with a standard 3V coin cell batteries or pair of AAA batteries. in lowest power shutdown mode it consumes only 0.5 uA and will wake up in few microseconds.
It’s transmission distance of 30 meter. (At face to face, free space, 1.2 Meter high from Ground for testing).
Applications:
Heart rate sensors
Pedometers
Watches
Blood pressure and glucose meters
Weight scales
Key fobs
Households sensors and collector devices
Security tags
Wireless keys (keyless go)
Proximity sensors
HID keyboards and mice
Indoor GPS broadcasting devices

KEY FEATURES:
BLE v.4.0 single mode compliant
Supports master,slaveand master/slave modes
Integrated BT low energy stack
GAP, GATT, L2CAP, SMP BT low energy profiles
Compliance: BQB BLE4.0, FCC, IC(Canada), CE ETSI RED…etc. worldwide RF Regulations.
Transmit power :+0dBm typical
Receiver sensitivity: -94dBm typical
In-System-Programmable Flash 256KB SRAM 8KB
Low current consumption :Shutdown. No clocks running, no retention: 0.5uA(Typical)

Wireless Features:

Bluetooth version Bluetooth 4.2, support Bluetooth 5.0
Frequency range 2402-2480MHZ(2.4G ISM)
Modulation mode GFSK
Transmit power -23 – 0dBm
Receiving sensitivity -94dBm(typical)
Transparent transmission mode (factory setting required) Single-connected slave, single-connected host, universal host, beacon, beacon+slave
Upgrade method Support OAD upgrade / support SBL upgrade
Transmission distance 30m(0dBm)

Hardware Specifications:

Module size 25.3*15.2*2.04mm
Chipset CC2541
Module communication interface UART/SPI/IIC
Module pin number 24PIN
Antenna PCB antenna
Working Voltage (DC) 2.0 – 3.6V
Working Temperature -30℃-+80℃
Storage Temperature -40℃-+100℃

Software Specifications:

Single link feature Only supported by 1 host link, can support large packet transmission
Single link rate 1K/S (up to 128 Bytes in a single package, two-way 20ms transmission interval)
Baud rate 9600bps-230400 bps(Default 9600 bps)
Parameter configuration AT command
Wireless security AES

Power consumption specifications:

Active-Mode RX 20.2mA max
Active-Mode TX @ 0dBm 18.2mA max
Active-Mode TX @ +5dBm 9.1 mA max
Sleeping mode 0.45uA avg
data transmission 8.36mA avg

Pin definition and description

Pin
No.
Function Function Description
1 IO2_2 / DC Digital I/O port 2_2 / Debug clock
2 IO2_1 / DD Digital I/O port 2_1 / Debug data
3 IO2_0 Digital I/O port 2_0
4 IO1_7 / SEL1 Digital I/O port 1_7
MCU communication mode select, See table(5-3) Communication
protcol mode selection, I/O setting Table
5 IO1_6 / SEL0 Digital I/O port 1_6
MCU communication mode select, See table(5-3) Communication
protcol mode selection, I/O setting Table
6 IO3_1 /
I2C SCL
Digital I/O port 3_1
IIC serial Clock (SCL)
can be used as I2C clock pin or digital I/O. Leave floating if not used. If
grounded disable pull up
7 IO1_5 Digital I/O port 1_5
8 IO1_4 / PWM4 Digital I/O port 1_4 / PWM port 4
9 IO1_3 / PWM3 Digital I/O port 1_3 / PWM port 3
10 IO1_2 / PWM2 Digital I/O port 1_2 / PWM port 2
11 IO3_0 / I2C
SDA
Digital I/O port 3_0
I2C serial Data (SDA)
Can be used as I2C data pin or digital I/O. Leave floating if not used. If
grounded disable pull up
12 GND BLE module grounding pin
13 VCC BLE module power supply pin,
voltage range of 2.0 ~ 3.6V
14 IO1_1 / PWM1 Digital I/O port 1_1 20mA drive capability
/ PWM port 1
15 IO1_0 / PWM0 Digital I/O port 1_0 20mA drive capability
/ PWM port 0
16
17
IO0_7 Digital I/O port 0_7
ADC7 ADC port 7
PWM5 PWM port 5
IO0_6 Digital I/O port 0_6
18
19
INT Interrupt output pin
ADC 6 ADC port 6
IO0_5 Digital I/O port 0_5
SPI SCK SPI Bus clock signal
ADC 5 ADC port
IO0_4 Digital I/O port 0_4
20
21
22
WAKEUP BLE wake up pin, Low/ wake up, High / BLE module automatically sleep
ADC4 ADC port 4
IO0_3 Digital I/O port 0_3
UART TX UART Serial data bus output
SPI MOSI SPI Master Out , Slave input
ADC3 ADC port 3
IO0_2 Digital I/O port 0_2
UART RX UART Serial data bus input
SPI MISO SPI Master input , Slave output
ADC2 ADC port 2
IO0_1 / ADC1 Digital I/O port 0_1 / ADC PORT 1
23 IO0_0 / ADC0 Digital I/O port 0_0 / ADC PORT 0
24 Reset BLE hardware reset pin (Low: reset)

Pin Function Description (The module following collectively “BLE”):
a. UART: serial bus, the default baud rate 9600bps, a single packet transmission
is less than 17 bytes, package transmission intervals greater than 20ms.
b. SPI: SPI bus interface, support for less than 2M / S data transmission rate,
a single packet transmission is less than 17 bytes, package transmission intervals greater
than 20ms.
c. IIC: IIC bus interface, support more than 22K / S, less than 400K / S data
transmission rate, a single packet transmission is less than 8 bytes,
package transmission intervals greater than 20ms.
d. MOSI: Master output, Slave input.
e. MISO: Master input, Slave output.
f. SCK: SPI bus clock signal.
g. SDA: IIC data.
h. SCL: IIC clock.
i. WAKEUP: BLE wake up pin, Low _wake up, High/ BLE module automatically sleep.
j. SEL0 & SEL1: MCU and BLE communication mode selection pin. Specific details,
see “(4-3) communication protocol mode selection, I/O setting table “.
k. RESET: BLE hardware reset pin, Low level reset.
l. VCC: BLE module power supply pin voltage range DC 2.0~3.6V.
m. GND: BLE module ground pin.

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