Tzonedigital_TT18 V2.1 Apr27, 2017
TZ-TT18
Temperature&humidity Transmitter
User Guide V2.1
1. Product overview
The temperature and humidity transmitter (hereafter referred as TT18) is with built-in
temperature & humidity sensor and GSM module which needs to inset SIM card use.
There are three modes of TT18, turn on, turn off and flight mode. It only wakes up
when it is time to send data or when the use operates it. Otherwise, it is in sleep status.
So that it can be used for a longer time to bring you more convenience.
TT18 can collect the surrounding temperature and humidity with high precision
quickly and transmit them to the server through GPRS. It is widely used in cold chain
logistics, medicine, transportation and other industries.
When using, hang the wall, it can react the peripheral temperature very quickly.
Tzonedigital_TT18 V2.1 Apr27, 2017
2. Specification
3. Indicators and interface
Hardware
Function
A1. LED
Show the device’s status (Green+Red)
Specification
Details
Dimension
90mm*64mm*27mm
Battery
Built-in 3.7V/3000mAh Lithium battery
GSM antenna
Built-in
Flash memory
Can save 4320 GPRS data
Temperature precision
±0.3℃
Detect temperature range
-40℃~ +125℃
Operating temperature range
-20℃~ +60
℃
Humidity precision
±3%
Detect humidity range
0~100%
Power consumption
Active mode(avg.) < 100mA
Sleep mode(avg.) < 2mA
Air pressure
860Kpa --1060Kpa
Humidity
Up to 75% non-condensing
GSM chip
SIMCOM GSM chip, 4 Frequency GSM
850/ 900/1800/1900mHz
LED
Device status/charge
Tzonedigital_TT18 V2.1 Apr27, 2017
A2. LED
Charge status (Red)
B. USB Port
Configure or charge the machine
C. SIM card slot
Insert the SIM card
D. Button
Turn on the unit or to know the machine’s status with press
4. Device mode
Device mode
Instructions
Turn on mode
When pressing the button after 5 seconds left or set 005
command by serial port ( in turn off /flight mode, note:
need pressing the button for 15s in flight mode)
Turn off mode
Only set 005 command can let the device turn off ( in turn
on/flight mode,note:set 005 command only by serial port in
Flight mode)
Flight mode
When pressing the Button for 15s or set 005 command,only
save and not sending data in this mode ( in turn on/turn off
mode, note: set 005 command only by serial port in turn off
mode)
5. Indicator status
Note: The A1 Red+Green LEDs of the device will blink at the same time when
the machine is boot. If you’d like to know the device’s status, you need to press
the button after 0.5 seconds left, then the led will show to you which status in
now and the LED only last 10s every time. If the device status led is off , the
mean is the device is off, There is priority of the device’s status, the greater
number, the higher priority, flashing as follows:
A1.Green+Red LED - indicating the device status
Device led status
Instructions
Priority
Green and Red led each on 0.1 seconds
Boot
Green On for 0.1 seconds and off for 0.1
seconds
Working properly
1
Red On for 0.1 seconds and off for 0.1
seconds
Battery low voltage
2
Red always on
Device have problem (no
signal and can’t send data
to server)
3
Green On for 1 seconds and off for 1
seconds
Flight
4
Tzonedigital_TT18 V2.1 Apr27, 2017
Off
The device is off
5
A2.Red LED - Power status
Power status
Instructions
Red on
charging
Red off
No charge or full charge
6. GPRS data format
TT18 GPRS data is in hex format.
The format of hex code:
Format: Start bits(2byte) + Packet length(2byte) + Protocol number(2byte) +
Hardware type(2byte) + Firmware version(4byte) + IMEI(8byte) + RTC data
time(6byte)+ LBS data length(2byte) + LAC(2byte) + CELLID(2byte) +
MCC(2byte) + MNC(2byte) + Extension bits(A) + State data length(2byte) +
Alarm type(1byte) + Terminal information(1byte) + GMS signal strength(1byte)
+GSM state(1byte) +Battery voltage(2byte) + Temperature(2byte) +
humidity(1byte) + Extension bits(B) + Extension bits(C) + packet index(2byte) +
CRC(2byte) + Stop bits(2byte)
The data of the device send to the server:
54 5A 00 2F 24 24 04 03 01 07 00 00 08 66 10 40 27 00 34 28 09 01 01 05 03 0D 00 08 25 33 78
37 04 60 00 01 00 09 AA 00 17 37 01 95 09 DA 45 00 0A 57 0A 0D 0A
Below is a table tells more detail information about the protocol.
Data block
Number
of bytes
Data
Content
Meaning
Start bits
2
‘T’ ‘Z’
TZone company identifier, this is the header of every
packet
Packet length
2
Variable
The bytes length from the start at protocol number to the
end at the CRC.
Protocol number
2
‘$$’
Normal data
Hardware type
2
0x04 0x03
The hardware is TT18
Firmware version
4
Variable
0xFF 0xFF0xFF0xFF = 255.255.255.255
IMEI8Variable
BCD format, i.e. 0x08 0x66 0x10 0x40 0x27 0x00 0x34
0x28 = 866104027003428
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