Ebyte E104-BT40-TB User manual

E104-BT40-TB User Manual v1.0

1. Introduction

1.1 Feature introduction

E104-BT40-TB backplane adopts USB interface, which can quickly test the

E104-BT40 Bluetooth related features and functions.

1.2 Electrical parameters

No.

Parameter name

Parameter value

Comment

Support module

E104-BT40

Dual-mode Bluetooth to serial port

module

Module process

With USB connector

Production process

Lead-free process, SMT

Batch consistency and reliability are

ensured via SMT

Power supply interface

USB or external power

supply

Communication Interface

USB

Operating temperature

-40~+85℃

Industrial grade

Operating humidity

10%~90%

Relative humidity, non-condensing

Storage temperature

-40~+125℃

Industrial grade

2.Function description

2.1 Pin definition

Pin No.

Pin name

direction

Use

VBAT

Input

External 3.3V power supply

USB

Input

USB 5V power supply

+5V

Input

External 5V power supply, same as USB

RESET

Input

Reset pin

P10

Input

Test the P10 pin, press it for low level

VCC

Two alternative power supply modes: USB / 5V and VBAT

Input

Serial data input

Output

Serial data output

PWM2

Output

Output PWM2, connected to PWM LED

DISC

Input

Default pull-up input, the jumper cap is connected, and a

falling edge is generated, that is, the connection is

disconnected

MODE

Input

Low level switches to AT command mode, high level

switches to data transparent transmission mode (effective

when connected)）

2.2 Function test

Test function

Description

Transparent

transmission

test

The module acts as a slave, and a mobile phone, computer or other host module acts as a

master to establish a Bluetooth master-slave connection to achieve transparent data

transmission.

1. The module is connected to the computer USB. The 6-pin jumper cap is selected to be

caps, MOD, DISC is floating;

2. The module is connected to the computer USB interface, the power indicator is always

on, the STAT indicator flashes at 1HZ, and the module is powered on normally. The module

automatically enters the broadcast (BLE) or query scan status (SPP). After the host initiates

the connection and establishes the connection, the STAT and LINK LED are always on,

indicating that the Bluetooth connection is successful.

3. Open the serial port, the default baud rate is 115200, the data bit is 8, 1 stop bit, no parity

bit, no flow control.

Disconnect

1. Establish a Bluetooth connection by according to transparent transmission test.

2. After the module is connected, the jumper cap is shorted to pin 10, that is, DISC, and the

connection is disconnected

Parameter

modification

1.The module is in the configuration mode when it is not connected, and the MODE pin is

left floating.

2. Pull the MODE pin low to establish a connection and at this time it is in AT command

mode.

3. The MODE pin is left floating. After the module is connected, pull the MODE pin low

and wait for about 200ms before the module enters the AT command mode; Pull the MODE

pin high and wait for about 200ms, the module exits the AT command mode and switches to

transparent transmission mode(MODE pin takes effect after connection)

4. After the module is disconnected, it is also in AT command mode

PWM test

Module is powered on, for example: AT + PWM2 = 100 command sets PWM2 output,

observe that PWM LED is always on; AT + PWM2 = 50, PWM LED 1HZ frequency

flashes

IO input test

The module is powered on, and this is the configuration mode. Send the command AT +

P10 ?, the default result is high level, press the key corresponding to pin 5 and send the

above command at the same time, the result is low level.

About us

Technical support: support@cdebyte.com

Documents and RF Setting download link:：https://www.cdebyte.com

Thank you for using Ebyte products! Please contact us with any

questions or suggestions: info@cdebyte.com

Official hotline:028-61399028

Web: https://www.cdebyte.com

Address: B5 Mould Park, 199# Xiqu Ave, High-tech District,

Sichuan, China

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