Users Manual

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900T30S User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
21
1，0： Transmitting power
00：30dbm（default）
01：27dbm
10：24dbm
11：21dbm
be sent in the transmitting mode or WOR
transmitting mode to read the register.
Register 0x00: Current ambient noise rssi
Register 0X01: rssi when the data was received
last time.
（Current channel noise is: dBm =-RSSI/2）
Command format: C0 C1 C2 C3 + starting
address + read length
Returns: C1 + address address + read length + read
valid value
E.g: send C0 C1 C2 C3 00 01
Return C1 00 01 rssi
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 Power and current are nonlinear, and power
efficiency is highest at maximum power.
 The current does not decrease in proportion to
the decrease in power.
05H
Read/W
rite
REG2
Channel control（CH）
0-80 represents a total of 81 channels
 Frequency= 850.125 + CH *1M
06H
Read/W
rite
REG3
7 Enable RSSI
1：Enable
0：Disable（default）
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6， Fixed point transmission
1：Fixed point transmission mode
0：Transparent transmission mode
（default）
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5 Enable reply
1：Enable repeater function
0：Disable repeater function
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4 LBT enable byte (monitor before
transmission)
1：Enable
0：Disable（default）
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 When enabled, the module receives wireless
data and it will follow an RSSI strength byte after
output via the serial port TXD
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 The module recognizes the first three bytes of
the serial data as: address high + address low +
channel and takes it as the wireless transmitting
target.
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 After the reply function is enabled, if the target
address is not the module itself, the module will
forward it once.
 In order to prevent data return-back, it is
recommended to use it in conjunction with the
fixed point mode. That is: the target address is
different from the source address.
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 When enabled, wireless data will be monitored
before it is transmitted, which can avoid
interference to a certain extent, but may cause
data delay.
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