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Wireless UART Module
6.2 Transmission Mode（Mode 0）
Status
Transmitting
Continuous
transmission
Receiving
Transmitting
Fixed-length
transmission
Receiving
6.3 Reserve Mode（Mode 1）
Status
When M1 = 0 & M0 = 1, module works in mode 1.
Remarks
UART and wireless channel are disabled.
6.4 Instruction Mode（Mode 2）
Status
When M1 = 1 & M0 = 0, module works in mode 2.
Transmitting
N/A
Receiving
N/A
Remarks
In this mode, UART baud rate is fixed as 9600 8N1, module can receive command for parameter-setting.
6.5 Sleep Mode (Mode 3)
Status
When M1=1,M0=1,module works in mode 3.
Transmitting
N/A
Receiving
N/A
Notes
The wireless receiver is closed and the MCU is in a sleep state, when the power consumption of the whole machine is about 4 uA.
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd.
When M1 = 0 & M0 = 0, module works in mode 0
Air data rate will automatically match with configured baud rate(≤57600), which enables user to
input data continuously, and module transmits data immediately once it receives user data.
Unlimited package length for continuous transmission.
Transmission is available when baud rate set as 115200, but not continuous transmission.
So baud rate 115200 is not recommended for user when module works in continuous transmission.
AUX is the indication for module's working status, when module receives the first byte of user data,
AUX output low level (busy for transmitting).
After the module transmit all the data into RF chip & start transmission, AUX outputs high level.
After module receives data form transmitter, AUX outputs low level (busy for receiving), and starts
to transmit data package from TXD after 5ms delay.
After module transmits all the data from TXD, AUX outputs high level.
UART baud rate must keep the same for both transmitter and receiver. When module receives data
from transmitter, TXD can transmit data continuously without interspace between bytes.
Serial transmission is suitable for low-latency occasion like Modbus.
UART baud rate, air data rate, address, FEC, password etc. are configurable for user, and the maximum
packet length is 77 bytes.
The principle module follows: all the data transmit from transmitter to receiver with the shortest time
under the current air data rate.
When the data package received by RXD is up to or more than 77 bytes, module starts to transmit
data (data package is 77 bytes). The data more than 77-byte will be transmitted in the next package.
When the required transmission bytes are less than 77 byte, module will wait 3-byte time and treat
it as data termination unless continuous data inputted by user. Then module will transmit all the data
through wireless channel.
For example: if the required transmission byte is 1 byte, module will transmit the 1-byte package
after wait 3-byte time. AUX is the indication for module's working status, when module receives
the first byte of user data, AUX output low level (busy for transmitting).
After the module transmit all the data into RF chip & start transmission, AUX outputs high level.
Due to the 256 bytes buffer for transmission, so it is required that the data inputted by user is less
than 256-byte one time. Next package can be inputted after AUX turns low level to high level.
After module receives data form transmitter, AUX outputs low level (busy for receiving), and starts
to transmit data package from TXD after 5ms delay.
After module transmits all the data from TXD, AUX outputs high level.
User Manual of E61 Series Modules
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