Chengdu Ebyte Electronic Technology Co.,Ltd E840-TTL(4G-02)User Manual
Copyright
©
2012
–
2019
，
Chengdu Ebyte Electronic Technology Co.,Ltd
10
5. Use the PC-side tool to send data to, and use the mobile phone to send data to the device. The communication test
result is as shown below:
2.1 Data transmission test
⚫
Software tools used for the test are as follows
：
Any serial port assistant, XCOM is used in this manual, which can be downloaded from our official website.
2.1.1 Operating mode is as follows
：
1
、
operating mode includes
：
transparent transmission mode
、
AT configuration mode
a) Transparent transmission mode: After power-on, the radio 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 data 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
1024 bytes. When multiple links are connected to the server at the same time, the data packet will be sent to the four links at the
same time. When there are data to be sent from any network link, the radio will transparently output the data.
b) Protocol transmission: This module supports 4-channel Socket connections. For each socket users can configured it as TCP
Client or UDP Client. When sending data, users can use protocol transmission or transparent transmission.
Protocol transmission format
Transmit
：
0x55 0xFE 0xAA ID data
For example
：
55 FE AA 02 AA BB //02
：
SOCK2 link
，
AA BB
：
the data that the user actually needs to
transmit
