Chengdu Ebyte Electronic Technology Co., Ltd E34-2G4H27D User Manual
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co., Ltd
13
7.4 Reset instruction
Instruction format
Description
C4+C4+C4
In sleep mode
（
M0=1
，
M1=1
）
,
User gives the module instruction (HEX format): C4 C4 C4, the module resets for one time.
During the reset process, the module will conduct self-check, AUX outputs low level. After reset
completing, the AUX outputs high level, then the module starts to work regularly which the working
mode can be switched or be given another instruction.
7.5 Parameter setting command
No.
Item
Description
Remark
0
HEAD
Fix 0xC0 or 0xC2, it means this frame data is control command
Must be 0xC0 or 0xC2
C0: Save the parameters when power-down
C2: Do not save the parameters when power-
down
1
ADDH
7, 6, 5, 4: resend times
（
only valid under mode 0 & 2
）
Default 15 times (default F). Lost data will be
resent.
When multiple same addresses exist, conflict
may occur, please set as 0.
3, 2, 1, 0: high address
（
default F0H)
Default 0
2
ADDL
Low address of module (default 00H)
00H-0FFH
3
SPED
7
6
UART parity bit
UART mode can be different between
communication parties
0
0
8N1 (default)
0
1
8O1
1
0
8 E1
1
1
8N1 (equal to 00)
5
4
3
TTL UART baud rate
（
bps
）
UART baud rate can be different between
communication parties;
The UART baud rate has nothing to do with
wireless transmission parameters & won’t affect
the wireless transmit / receive features.
0
0
0
1200
0
0
1
2400
0
1
0
4800
0
1
1
9600 (default)
1
0
0
19200
1
0
1
38400
1
1
0
57600
1
1
1
115200
2
N/A
0 is recommended
1
0
Air data rate
（
bps
）
The lower the air data rate, the longer the
transmitting distance, the better the anti-
interference performance and the longer the
transmitting time;
The air data rate must keep the same for both
communication parties.
0
0
250k
（
default
）
0
1
1M
1
0
2M
1
1
2M
（
same to 10
）
