Chengdu Ebyte Electronic Technology Co., Ltd.
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd
16
E90-DTU(400SL30P)
Default
√
√
√
Note: The lower the transmit power, the closer the transmission distance, but the working current won’t be declined in
exact proportion , it is recommended to use the maximum transmit power.
5.5 Air data rate
Model
Default
Levels
Air data rate (bps)
bps
bps
E90-DTU(400SL30
P)
2.4k
8
0.3
、
1.2
、
2.4
、
4.8
、
9.6
、
19.2
、
38.4
、
62.5k
Note: The higher the air data rate, the faster the transmission rate, the transmission distance is also closer; when the rate
meets the requirements , the lower air data rate, the better quality.
5.6 Current
Model
Supply voltage V
TX current mA
Standby current
mA
E90-DTU(400SL30
P)
8
436
60
12
288
42
24
149
23
28
130
20
Note: It is recommended to retain more than 50% of the current margin when selecting the power supply, which will help
the data transceiver to work steadily for a long time.
5.7 TX and RX FIFO and sub-packing method
Model No.
Buffer
Sub-packing method
E90-DTU(400SL30P
)
1000
字节
Can be sub-packed to 32/64/128/240 byte each time
via command
Note: 1. When the receiving data is more than a single packet capacity, the beyond part will be automatically assigned to
the second transmission until it is completed;
2. The data transceiver can not receive data which is more than the buffer capacity;
6. Function Description
6.1 Fixed Transmission
（
Hexadecimal
）
During fixed-point transmission, the module recognizes the first three bytes of the serial data received as:
Address high + address low + channel, and use it as a wireless transmission target.
