Connection Method; Network Basic Function Introduction; Ip Address/Subnet Mask/Gateway - Ebyte E70-DTU User Manual

Star Network Modem

2.3 Connection method

3. Network basic function introduction

3.1 IP address/Subnet mask/Gateway

1. The IP address is the identity of the module in the LAN. It is unique in the LAN and cannot be duplicated with other
devices on the LAN.
E70-DTU(433NW30-ETH)'s IP address of E70-DTU(433NW30-ETH) is static IP and DHCP.
(1) Static IP
Static IP requires the user to set manually，please note that the IP, subnet mask, and gateway should be written at the same
time. Static IP is suitable for scenarios that require IP and device statistics and have a one-to-one correspondence.
Advantage: Devices which cannot automatically assign IP addresses can be searched through the entire LAN.
Disadvantages: Different IP segments in different LANs cannot carry out normal TCP/UDP communication.
(2) DHCP
The main role of DHCP is to dynamically obtain IP address, Gateway address, DNS server address and other information
from the gateway host, eliminating the cumbersome steps of setting the IP address. It is suitable for scenarios where there is
no requirement for IP and no need for correspondence one by one of IP and modules.
Advantages: When connected routers and other devices with DHCP Server can communicate directly, and reduce the hassles
of setting up IP address gateways and subnet masks.
Disadvantages: When connected LANs without DHCP Server, such as computers, E70-DTU(433NW30-ETH) cannot work.
2. The subnet mask is mainly used to determine the LAN number and host number of the IP address, and indicate the number
of subnets, and judge whether the module is within the subnet。The subnet mask have to be set, what we normally use is C
type subnet mask: 255.255.255.0, LAN number is the first 24 numbers, host number is the last 8 numbers, and there are 255
subnets, If the module IP is within the 255 subnets, it is considered to be in this subnet.
3. The gateway refers to the LAN number of the LAN where the current IP address of the module is located. If a device such
as a router is connected to an external network, the gateway is the router IP address，If the setting is incorrect, the external
network cannot be accessed properly，If you do not connect a device such as a router, you do not need to set it, by default.
4. Software setting
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E70-DTU(433NW30-ETH)_User Manual
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