Chengdu Ebyte Electronic Technology Co.,Ltd.
Copyright ©2012–2020
Chengdu Ebyte Electronic Technology Co.,Ltd.
26
MODBUS and also meets the requirements of low time delay.
shortcoming
The baud rate of the serial port of both the sending and receiving parties must be consistent; After the serial baud rate
is increased, the module will be adjusted to a higher airspeed, resulting in a decrease in reception sensitivity and a
decrease in transmission distance.
Applicable scenarios
It is suitable for occasions where the distance requirements are not high, but the data continuity and response time
are very high.
note
1．
The
"
wireless air rate"
in the configuration instruction
is invalid (SPED.210 bits), the software automatically
calculates;
2．
0000
and
FFFF are broadcast addresses that can be used for monitoring and broadcasting;
3．
The addresses and baud rates of both communicating parties must be consistent;
4．
Both transceiver modules must use the same model, such as
E70 (868T14S)
and E70 (868T30S) cannot
communicate continuously.
6.4 Subcontracting mode (mode 2).
state
M2
、
M1
、
M0 = 010
launch
Wireless data transmission is possible.
reception
Wireless data reception is possible.
Baud rate and
airspeed
In this mode, the serial port baud rate and airspeed are independent, and the sending and receiving parties can have
different serial port baud rates, but must have the same airspeed setting.
merit
A very low airspeed can be set to achieve long-distance transmission, and the continuity between output data bytes
depends on the module package length.
shortcoming
Depending on the setting, the airspeed can be set very low and the transmitter needs to wait for the number of packet
length bytes or timeout bytes.
Applicable scenarios
Occasions where the distance requirements are high, and a certain output continuity is required, but the transmission
rate is required to be low.
note
1、
Airspeed and baud rate are independent and their settings are in effect.
2、
0000
and
FFFF are broadcast addresses that can be used for monitoring and broadcasting.
3、
The airspeed and address of both sides of the communication must be consistent, and the baud rate can be
inconsistent.
4、
The maximum packet data per packet
is
defined by the packet size [7:5] (excluding addresses and channels for
directed sends).
6.5 Configuration Mode (Mode 3).
state
M2
、
M1
、
M0 = 011
launch
Wireless transmission is not possible, and the received serial port data will be discarded.
reception
Wireless reception is not possible.
disposition
It can be used for module parameter setting,
using serial ports
9600
,
8N1, to set module working parameters
through a specific instruction format
