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JZ875 Micro-power wireless data module
SHENZHEN JIZHUO TECHNOLOGY CO., LTD
TEL
：
0755-83304518 83308451
Tech:0755-61319411 61319410
WEB: http://www.jizhuo.com
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JZ875 wireless module, the use of ISM frequency band; can be set to 16 communication
channels, transmit power
1\2W(30dB\33dB)
, high receiver sensitivity-123dbm, size 90mm * 64mm *
23mm (without antenna base), a large number of the billing system , industrial control field use,
very convenient for users to do the embedded wireless systems.
JZ875 the use of transparent transmission, in order to ensure the reliability and stability of the
user's system, plus the transmission checksum or CRC checksum error detection mode, the error
data retransmission. Transceiver module buffer of 512bytes, means that users can be in any state
512bytes of data transfer 1, when the speed is greater than the serial port is set to air rate, is
theoretically unlimited length can send information packets, but does not recommend users to send
long data packets, the proposed length of each packet data between 60 ~ 100B, generally not
longer than the 120B, and recommended user program using the ARQ mode, the error data packets
retransmission. As follows:
If the actual error rate 10-4, users need to send 1KB about 10000bit information, if the 1KB data
as a packet, sent at least theoretically, there will be a data error in the receiver, then the 1KB data
can never be received correctly. If it is divided into 10 packages, each package 100B, then send 10
packets, the packets according to a probability of only 1 error, the error in the form of a packet
retransmission by ARQ 1, although it took more than 1 packet and the efficiency decreased by
about 10%, but it can guarantee all the information is correctly received.
JZ875 set parameters, the market is no longer used wireless modules used in the traditional way to
change the parameters of the jumper, causing long-term use because it brings bad, options less
dynamic change is not easy, a lot of inconvenience. JZ875 using the serial port setting parameters
easy and quick, easy set refers to the chip embedded in the user program and operating software in
the background. Meanwhile module 1200/2400/4800/9600/19200/38400bps six kinds of rate and
frequency of 16; provide UART / TTL, RS232, RS485 three kinds of interfaces. Choice for users.
In the work on, JZ875 There are two ways of working, first for the conventional model, which
Module is powered On, is in receive mode; you also can be sending data. The second is sleep
mode, that is, through the power module in a dormant state, it must be user-controlled mode
