Chengdu Ebyte Electronic Technology Co., Ltd.
NB114 User Manual
Copyright ©2012–2023
，
Chengdu Ebyte Electronic Technology Co., Ltd.
4.6.5.Random native port
TCP client, UDP client, HTTP client and MQTT client can configure the local port to 0
(use random local port). The server mode cannot use random port, otherwise the client
cannot establish a connection correctly.
Using random port connection can quickly re-establish the connection when the device
accidentally disconnects the server, to prevent the server from refusing the connection due
to four incomplete waves. It is recommended to use random port in client mode.
The device will automatically enable random ports when configuring TCP client, HTTP
client and MQTT client modes.
4.6.6.Remote upgrade
In order to facilitate later maintenance and upgrade functions and replace different
firmware, serial servers (NA11x series, NB114, NS1, NT1, etc.) support online upgrade.
Users can upgrade or replace the current firmware through the upper computer through the
upgrade firmware provided by our company.
Network upgrade firmware operation steps:
Step 1: download the upper computer and "product firmware" at the corresponding
location on the official website;
Step 2: Open the upper computer, click "Menu", and select "Device Upgrade Assistant";
