Bluetooth 2.0 Module V3 For Arduino

Bluetooth 2.0 module with dual-board design for electrostatic protection, two DC power inputs, built-in antenna, DIP switch for settings, and LED status indicators.

Logical pinout · physical placement not verified

GNDOfficial table 2 row 1
GND
Type · Ground
VCCOfficial table 2 row 2
3.5-8V DC (When there is VCC input, 3V3 port can be used as 3.3V power output)
Type · Power
NCOfficial table 2 row 3
Empty Pin
Type · Control
RXDOfficial table 2 row 4
UART Input(TTL Level), connect to MCU TXD
Type · UART
TXDOfficial table 2 row 5
UART Output(TTL Level), connect to MCU RXD
Type · UART
3V3Official table 2 row 6
DC3.3V (When there is 3.3V input, the VCC port cannot be connected to power source)
Type · Power

Pin	Position	Type	Function
GND	Official table 2 row 1	Ground	GND
VCC	Official table 2 row 2	Power	3.5-8V DC (When there is VCC input, 3V3 port can be used as 3.3V power output)
NC	Official table 2 row 3	Control	Empty Pin
RXD	Official table 2 row 4	UART	UART Input(TTL Level), connect to MCU TXD
TXD	Official table 2 row 5	UART	UART Output(TTL Level), connect to MCU RXD
3V3	Official table 2 row 6	Power	DC3.3V (When there is 3.3V input, the VCC port cannot be connected to power source)

Logical pinout · physical placement not verified

Pin details

6 connections

GND
GND
Ground
Official table 2 row 1
VCC
3.5-8V DC (When there is VCC input, 3V3 port can be used as 3.3V power output)
Power
Official table 2 row 2
NC
Empty Pin
Control
Official table 2 row 3
RXD
UART Input(TTL Level), connect to MCU TXD
UART
Official table 2 row 4
TXD
UART Output(TTL Level), connect to MCU RXD
UART
Official table 2 row 5
3V3
DC3.3V (When there is 3.3V input, the VCC port cannot be connected to power source)
Power
Official table 2 row 6

Start wiring

UART · SPI · 3.3 V · 5 V · Breakout

Seeed describes MDBT50Q-1M and MDBT50Q-P1M as Bluetooth 5.0 / BLE modules based on Nordic nRF52840, with GPIO, SPI, UART, I2C, I2S, PWM, …

Module pins: VCC, 3V3, GND, RXD, TXD. Schematik maps them to your board in the app.

Bluetooth

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