Ebyte E840-TTL-NB03 User manual

E840-TTL-NB03 User Manual

NB Wireless Module

Chengdu Ebyte Electronic Technology Co., Ltd. E840-TTL-NB03 User Manual

Contents

FEATURE............................................................................................................................................................................. 2

1. PRODUCT OVERVIEW................................................................................................................................................. 2

1.1 INTRODUCTION.............................................................................................................................................................. 2

1.2 PARAMETER................................................................................................................................................................... 2

1.3 INTERFACE DESCRIPTION............................................................................................................................................... 4

1.4 PIN DEFINITION.............................................................................................................................................................. 4

2．QUICK START...............................................................................................................................................................6

2.1 HARDWARE PREPARATION............................................................................................................................................. 6

2.2 DATA TRANSMITTING TEST............................................................................................................................................7

2.2.1 WORKING MODE：..................................................................................................................................................... 8

3. AT COMMAND..............................................................................................................................................................10

4. NOTES.............................................................................................................................................................................18

5．IMPORTANT STATEMENT...................................................................................................................................... 18

6．REVISION HISTORY................................................................................................................................................. 18

7. ABOUT US......................................................................................................................................................................19

Chengdu Ebyte Electronic Technology Co., Ltd. E840-TTL-NB03 User Manual

E840-TTL-NB03 is developed for serial port devices and network servers to transmit data

through the network. It supports B8 frequency band. It can be easily set up with simple AT

commands. It can be used to realize serial-to-network two-way data transparency transmission. This

chapter is a quick introduction to the E840-TTL-NB03 product. It is the easiest hardware

environment to test the E840-TTL-NB03 network transmission function, that is, realize the two-way

transparent transmission of data from the serial device (the computer) to the network server.

Feature

It meets almost all M2M application needs；

Support data transparent transmission, support TCP/UDP network protocol, and heartbeat packet and

registration package function can be customized；

Serial port caching is supported. The serial port data can be cached locally before the server is connected；

The maximum downlink rate of NB data is 85.6 kbps, and the maximum uplink rate is 85.6 kbps；

Supports protocols such as TCP/UDP, encoding formats CS-1, CS-2, CS-3, and CS-4

1. Product overview

1.1 Introduction

E840-TTL-NB03 is a NB data transmission module developed by Ebyte. The software is fully functional and covers

most common application scenarios. Users can realize two-way data transparency from serial port to network server

through simple setup transmission.

The module uses 2.0mm pin headers to facilitate customer device integration, using 5V ~ 20V voltage supply.

Support mobile NB card, communication and LED indication with compatible level, default 3.3V can be applied to 5V

level, with anti-interference ability, can be used in some environments with strong electromagnetic interference, such as

some power industry.

1.2 Parameter

Name

Value

Description

Hardware

features

Frequency

Module will search frequency automatically

NB data feature

NB data downlink transmission：max 85.6kbps

NB data uplink transmission：max 85.6kbps

Coding format：CS-1、CS-2、CS-3 and CS-4

Support for PAP (Password Authentication Protocol) protocols

commonly used for PPP connections

Support usually used for CHAP (Interrogation Handshake

Authentication Protocol) protocol

Embedded protocol: TCP/UDP etc

Support for unstructured supplementary data services (USSD)

Chengdu Ebyte Electronic Technology Co., Ltd. E840-TTL-NB03 User Manual

Software features

Antenna

IPEX

IoT cloud

Ebyte-IOT

Data interface

[email protected]，compatible with 5V

Baud rate

Max 230400bps，default 115200bps

Tx power

23dBm±2dB

Power saving（typical value）

In power saving mode, max current consumption：5μA

In power saving mode, typical current consumption：3.5μA

Working Temperature

-30℃- +70℃；working at -40℃~+85℃

Working Voltage

DC：5V~20V；Battery：2.5V~3.6V

Size

42×40×9.7 mm

SIM

MICRO SIM card

3GPP Frequency

1 Timeslot

2 Timeslot

4 Timeslot

CS-1

9.05kbps

18.1kbps

36.2kbps

CS-2

13.4kbps

26.8kbps

53.6kbps

CS-3

15.6kbps

31.2kbps

62.4kbps

CS-4

21.4kbps

42.8kbps

85.6kbps

Chengdu Ebyte Electronic Technology Co., Ltd. E840-TTL-NB03 User Manual

1.3 Interface description

1.4 Pin definition

Pin no.

Name

Function

RST

Module reset

IORT

The low level lasts for 3~10S, the module parameters will be restored to the factory settings, and

will be restarted immediately.

LINK

The link connection status indication pin corresponds to the onboard left 1 LED.

High: Successful connection to the web server;

Low: failed to connect to the web server;

4、24、25

Not used

DATA

Data transmission and reception indication pin, when the network receives data or the serial port

receives data (50ms high/10ms low), corresponding to the onboard third LED light from the left.

STAT

The device status indication pin corresponds to the onboard second LED from the left.

Low: The device is powered on to search for SIM card1800ms low, 200ms high: the device

checks the correct SIM card and is attaching to the network;

High: The device is attached to the network successfully.

RXD

Data receiving pin，default 3.3V，compatible with 5V

TXD

Data transmitting pin，default 3.3V，compatible with 5V

Chengdu Ebyte Electronic Technology Co., Ltd. E840-TTL-NB03 User Manual

VEF

Drive level power supply pin, if you need to achieve 5V serial communication and LED

indication is 5V drive level, you need to input 5V level on this pin.

10、11、14、

15、23

MOD、SLE、

PA6、PA7、EN

Unavailable

4V2

Lithium battery power supply pin, power supply range: 2.5V~3.6V. This pin is prohibited from

being reversed and is not allowed to be supplied with VCC.

VCC

DC power supply pin, power supply range: 5V~20V. This pin is prohibited from being reversed

and is not allowed to be supplied with 4V2.

Connect to external SIM card power supply pin, if the onboard SIM card holder is used, the pin

NC can be used.

Connect to external SIM reset pin, if the onboard SIM card holder is used, the pin NC can be

used.

Connect to external SIM data pin, if the onboard SIM card holder is used, the pin NC can be

used.

Connect to external SIM clock pin, if the onboard SIM card holder is used, the pin NC can be

used.

13、17、18

GND

Ground

Chengdu Ebyte Electronic Technology Co., Ltd. E840-TTL-NB03 User Manual

2．Quick start

2.1 Hardware preparation

Before testing, please connect serial port line as per recommended circuit, there are SIM card and antenna.

1. Enter the AT command mode and send +++ in the serial port assistant (except that +++ does not need to

check to send a new line, other AT commands need to tick to send a new line to be valid), you must send +++

command 3s Sending any other AT command (except for restarting the AT command) can completely enter the

AT command mode.

2. After entering the AT command mode, use AT+CPIN to check the SIM card access:

For example: AT+CPIN

+OK=1

Indicates that the SIM card is connected and uses AT+CSQ to view the current signal strength:

For example: AT+CSQ+OK=26Indicates that the current signal strength is normal.

If the response is 99, the current signal strength is abnormal. Check whether the current antenna is connected

or the surrounding base station is abnormal.

3. Access server, AT+SOCK=TCPC, 116.62.42.192, 31687 (parameters are separated by commas in English

characters, and IP commands are separated by English characters).SOCK settings

For example: AT+SOCK=TCPC, 116.62.42.192, 31687

+OK

Indicates that the setting was successful.

4. Restart (all AT commands modify parameters, the device will take effect after restart) After the execution

command AT+REBT returns OK, the device restarts immediately. Here, the IP only performs the demonstration.

The actual connection is based on the IP of the server to be connected.

Chengdu Ebyte Electronic Technology Co., Ltd. E840-TTL-NB03 User Manual

5. After the base station is connected, the NET light is always on to indicate that the server is connected,

and transparent transmission can be performed at this time.

2.2 Data Transmitting Test

Software is needed for data transmitting test:

Xcom is applied here for the test and you can download it at our website. Users can also apply other test tools that

are available.

Chengdu Ebyte Electronic Technology Co., Ltd. E840-TTL-NB03 User Manual

2.2.1 Working mode：

1. Working mode：Transparent transmission mode, AT configuration mode, cloud platform mode

a) Transparent transmission mode: After power-on, the module works in the transparent transmission mode by default,

and automatically starts the network connection. When the connection is established with the server, any data received by

the serial port will be transparently transmitted to the server. At the same time, it can also receive the number from the

server. After receiving the server data, the module will output directly through the serial port. The maximum length of

data supported by this module is 486 bytes.

This module supports one-way Socket connection. The user can be configured as TCP Client or UDP Client. In

transparent transmission mode, the received serial port data will be directly transmitted to the network server, and the

received network server data will be directly output through the serial port.

b) AT mode: In this mode, the serial port data is regarded as an AT command.

c) Cloud platform mode: The E840-DTU (NB-03) configuration tool can be used to switch to the cloud platform mode.

After the configuration is completed, the data can be tested. It should be noted that the maximum data of the single

package in the cloud platform working mode is 100. , the time interval for sending data packets is not less than 5s.

d) Mode switching. After the serial port receives the “+++” frame data in the transparent transmission mode, the RX pin

receives any AT command within 3 seconds, and the mode switches to the AT mode. In AT mode, send

AT+EXAT<CR><LF> to switch to transparent transmission mode.

2. Network function

a) Short connection: In TCP Client mode, the short connection function is enabled. If there is no data reception in the

serial port or network port within the set time, the network connection will be automatically disconnected. The short

connection function is turned off by default. The connection time can be set from 2 to 65535 seconds. When set to 0, the

short connection function is disabled.

b) Registration packet: The registration packet is closed by default. The total of 4 options are: send physical address

when connecting, send custom data when connecting, add physical address before each packet of data, add custom data

before each packet of data, customize The maximum length of the registration packet is 40 bytes (when set to HEX

format, the maximum length is 20 bytes).

c) Heartbeat packet: In the idle state of network communication, the heartbeat packet is used for network state

Chengdu Ebyte Electronic Technology Co., Ltd. E840-TTL-NB03 User Manual

maintenance. The heartbeat period can be set from 0 to 65535 seconds, and the maximum length of the heartbeat packet

is 40 bytes (when set to HEX format, the maximum length is 20 bytes). Supports two heartbeat types, network heartbeat,

serial heartbeat, selects network heartbeat, starts timing with communication idle, and sends heartbeat packets to the

server according to the configured heartbeat period. Select the serial port heartbeat, start timing with communication idle,

and send heartbeat packets to the serial port according to the configured heartbeat period.

d) Clear the cache: Before the connection to the server is established, the data received by the serial port will be cached.

When the connection with the server is established, you can choose whether to clear the cached data. By default, the

cache is cleared.

The maximum packet length of the local cache is 512 bytes.

3. Ebyte Internet of Things platform function

After the AT+EBTIOT command is used to set whether the module will enable the transparent transmission function of

the Ebyte cloud platform, after the device is turned on, the information such as the heartbeat and registration packet

configured by the user will be invalid. The user only needs to set the forwarding relationship of the corresponding device

to the platform to implement the device. Data is transparent. For specific operations, please refer to the "Ebyte Special

Cloud Platform Transparent Transmission Guide".

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