Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU(xxxSLxx-ETH)_V2.0 User Manual
Copyright ©2012–2023，Chengdu Ebyte Electronic Technology Co.,Ltd.
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4.2.8 RSSI
That is, the signal strength indication function. When enabled, data received wirelessly by the DTU will be
followed by an RSSI strength byte (in hex) after the user data. It can be used to evaluate the signal quality, improve
the communication network, range measurement, and can be used to implement the LBT function manually.
4.2.9 Channel RSSI enable
When enabled, the command C0 C1 C2 C3 can be sent in transmit mode or WOR send mode Read register.
Register 0x00 : Current ambient noise RSSI;
Register 0x01 : RSSI at the last received data. (Current channel noise is: dBm = -RSSI/2);
Command format: C0 C1 C2 C3 + start address + read length;
Return: C1 + address + read length + read valid value; for example: send C0 C1 C2 C3 00 01
Return C1 00 01 RSSI
Demonstration note, open data RSSI and channel RSSI, first send 0x31 with the remote device, the gateway
receives data (0x30) + RSSI (0xCE), and then query the channel RSSI and data RSSI results through the instruction
C0 C1 C2 C3 00 02 (HEX) as shown in the following figure:
4.3 Ethernet
4.3.1 IP Acquisition
Dynamic acquisition
（
DHCP
）：
The dynamic acquisition device will automatically obtain the IP address and subnet mask from the router
while synchronizing the router's gateway and DNS server, so only the working mode and target parameters of the
device can be configured in the dynamic acquisition mode.
Static configuration
（
STATIC
）：
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