Table of Contents
Advertisement
Indicator
Power
Online
Communicatio
n (valid in 3G
device)
If DTU works in TCP mode, it will send a registered packet when connect server first
time. When there is no data transmitting with server during 60 seconds, DTU will send a
heartbeat packet to server to keep the connection.
The data format that DTU sends to server:
1. Default registered packet:
ID
4
byte
Description:
ID：
PHONE_NUMBER：
IP_ADD：
ETX：
2. Default registered respond packet:
All series of DTU do not respond it by default.
3. Default heartbeat packet:
All series of DTU's default heartbeat packet's content is FE.
4. Default heartbeat response packet:
All series of DTU do not respond it by default.
5. Default data format of DTU:
All series of DTU send data to server transparently.
Xiamen Caimore Communication Technology Co.,Ltd
Annex II Indicator Light
Status
on
off
on
flicker
off
flicker
off
Annex III TCP Protocol
PHONE_NUMB
0
ER
11 byte
1
byte
8 HEX number
0x00, end mark of packet
厦 门 才 茂 通 信 科 技 有 限 公 司
Description
normal
No power
Connected center
Log in GPRS network
Not log in GPRS network
Sending and receiving data
No data in transmitting
IP_AD
ETX
D
4 byte
1
byte
11bytes ASCII code
IP address(HEX)
11
Advertisement
Table of Contents
