Chengdu Ebyte Electronic Technology Co., Ltd E34-2G4H27D User Manual
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co., Ltd
10
Transmitti
ng
The module can receive the user data via serial port, and transmit wireless data package of 27 bytes. When the data
inputted by user is up to 27 byte, the module will start wireless transmission. During which the user can input data
continuously for transmission.
When the required transmission bytes are less than 27 bytes, the module will wait 3-byte time and treat it as data
termination unless continuous data inputted by user. Then the module will transmit all the data through wireless
channel.
When the module receives the first data packet from user, the AUX outputs low level.
After all the data are transmitted into RF chip and transmission is started , AUX outputs high level.
At this time, it means that the last wireless data package transmission is started, which enables the user to input another
256 bytes continuously. The data package transmitted from the module working in mode 0 can only be received by the
module working in mode 0 or 2.
Receiving
The wireless receiving function of the module is on, the data packet transmitted from the module working in mode 0
& mode 2 can be received.
After the data packet is received, the AUX outputs low level, 5ms later the module starts to transmit wireless data
through serial port TXD pin.
After all the wireless data have been transmitted via serial port, the AUX outputs high level.
Notes
Module can not receive data when transmitting and can not transmit data when receiving.
6.3 Frequency hopping mode (Mode 1)
Type
When M0 = 1
，
M1 = 0
，
module works in mode 1.
Transmitting
The condition of data packet transmission & AUX function is the same as mode 0.
The only difference is that the module will according to certain algorithm rules, the frequency will change in send
&receive process, the scope is not limited to the basic frequency of user setting, the module has a specific spread
sequence.
Therefore, the data package transmitted from mode 1 can be received by mode 1.
Receiving
The same as that in mode 0.
Notes
Module can not receive data when transmitting and can not transmit data when receiving.
6.4 Reservation mode (Mode 2)
Type
When M0 = 0
，
M1 = 1
，
module works in mode 2.
Transmitting
The same as that in mode 0.
Receiving
The same as that in mode 0.
6.5 Sleep mode (Mode 3)
Type
When M0 = 1
，
M1 = 1
，
module works in mode 3.
