JZ873 Mini Power Wireless Module User
’
s Manual
2.JZ881 interface definition
1) User’s interface
JZ881 have one interface of TTL.
In standard interface, the plastic socket gap upward, from left to right,1-8 pin in turn, as follows;
Definition of connecting pins and connection method:
Item no
PIN Description
User’s terminal
Remarks
1
VCC
+5±0.5V
+5V
3V is possible for user
2
GND
Power supply/Ground
DGND/AGND
3
TXD
Serial data transmitting
TTL
User receiving
4
RXD
Serial data receiving
TTL
User transmitting
5
RXD/RS-485(A)
Serial data receiving
TXD/RS-485(A)
User transmitting
6
TXD/RS-485(B)
Serial data transmitting
RXD/RS-485(B)
User receiving
7
SLE
Sleeping control
Don't’ open
8
GND
Power supply/Ground
DGND/AGND
Remarks:
a. JZ881 with sleeping function is not open in default ,if the user need ,then you must say it clearly when
you place an order.
b. The standard power supply is 5V ,if the user need 3V ,then must tell us before place an order.
2) Power supply
JZ881 uses DC power supply with voltage of +5V. It can also share power supply with other equipment,
however, the high quality power supply with desirable ripple factor should be selected. In addition, the reliable
grounding must be used if there is other device in the system equipment. In case of failure to connect with the
earth, it can form its own grounding, but it must be absolutely separated from the municipal electric supply.
3). Power Saving model
JZ881 consists of Sleeping Model and Non-sleeping model. The power is 10Ua when sleeping. The user
need to specify which model you need .
Awaken from Hardware, you can input high level in 7pin, then it sleep.
If don’t need sleep ,then u can connect 7 pin to ground. It will not sleep.
3. JZ881 Parameters Setting
JZ881 have one interface of TTL.
JZ881 main parameters: COM baud rate and verify, RF baud rate, Channel and frequency.
You can change these parameters by our RF Module soft. When RF baud rate is faster than COM baud rate
，
One frame Can transmit limitless data. When RF baud rate is not faster than COM baud rate, one frame can
transmit 255 bytes most. You can set the rate according your need.
Two JZ881 communicate must have condition as follow:
1.Their channels (i.e. frequency) are the same.
2.Their RF rates are the same.
3.RF Module Com baud rate and verify is agree with its equipment or PC that it connects with.
Shenzhen Jizhuo technology CO.,LTD,China TEL：+86-755-83304518
http://www.jizhuo.com
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