Hardware Design

[中文版]

Module Pin Diagram

BT826

Pin Description

Pin

Pin Name

Type

Pin Descriptions

1

UART_TX

O

UART Data Pin (Transmit)

2

UART_RX

I

UART Data Pin (Receive)

3

UART_CTS

I

UART Flow Control Pin (Clear To Send)

4

UART_RTS

O

UART Flow Control Pin (Request To Send)

11

RESET

I

Reset Pin (Active-Low)

12

VDD

Power

Power Supply, 3.3V

13

GND

GND

GND

15

ICE

I/O

Programming Pin (In-Circuit Emulator)

29

I2C_CLK

I/O

I²C Clock

30

I2C_DTA

I/O

I²C Data

32

Work

O

Outputs square wave when BT not connected; Outputs high level when BT connected.

33

STATUS

O

Outputs low level when BT not connected; Outputs high level when BT connected.

36

EXT_ANT

ANT

Change the 0Ω resistor near the antenna to connect an external Bluetooth antenna.

Hardware Design Notes

  • In simple test environment, the module can be used for basic testing and operation by simply connecting VDD, GND, UART_RX, and UART_TX.

  • If the MCU needs to obtain the Bluetooth module’s connection status, connect to the STATUS pin.

  • Please submit the schematic diagram to Feasycom for review upon completion to ensure optimal Bluetooth range performance.