Table of Contents
Advertisement
Chengdu Ebyte Electronic Technology Co.,Ltd.
6.2 Transmission Mode (Mode 0)
Type
When M0 = 0, M1 = 0, the module works in mode 0
The module receives user data from the serial port, and the maximum length of the wireless data
packet transmitted by the module is 54 bytes. When the amount of data input by the user reaches
54 bytes, the module will start wireless transmission, and the user can continue to input the
data to be transmitted.
When the bytes that the user needs to transmit is less than 54 bytes, the module waits for about
emissi
20ms. If no user data continues to be input, the data is considered to be terminated, and the
on
module sends all data wirelessly.
When the module receives the first user data, it will output the AUX low level, when the module
put all the data into the RF chip and start the transmission, the AUX output will be high level.
At this point, it indicates that the transmission of the last packet of wireless data has been
started, and the user can continue to input data.
Data packets sent through mode 0 can only be received by the receiving module in mode 0.
The module has always turned on the wireless receiving function, and can receive data packets
from mode 0.
receiv
After receiving the data packet, after the module AUX outputs low level, it starts to send wireless
e
data through the serial port TXD pin. After all wireless data is output through the serial port,
the module outputs AUX high level.
6.3 RSSI Mode (Mode 1)
Type
When M0 = 1, M1 = 0, the module works in mode 1
emissio
Wireless transmission is not possible, and the received serial data will be discarded.
n
Can not receive air wireless data, only scan the signal strength of the current channel, output
a strength value (relative value) through the serial port every 100ms.
receive
Numerical calculation method: signal strength = -(256(decimal) – data(decimal)) dBm
If the hexadecimal value output by the serial port is 0x91, the actual signal strength is:
6.4 Setup Mode (Mode 2)
Type
When M0 = 0, M1 = 1 the module works in mode 2
emissio
Wireless transmission is not possible, and the received serial data will be discarded.
n
receive
Wireless reception is not possible
Can be used for module parameter setting, using serial port 9600, 8N1, setting module working
set
parameters through specific command format
When entering other modes from the setting mode, the module will reconfigure the parameters.
During the configuration process, AUX remains low;
note
After completion, it outputs a high level, so it is recommended that the user detect the rising
edge of AUX.
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd.
-(256(decimal) – 145(decimal))=-111dBm
E49-400T30D Specifications
11
Advertisement
Table of Contents
