# License Policy
Neuron is an open source project. We encourage our community to develop their own pluggable modules.
Core framework, dashboard and a few plugin modules such as modbus-tcp, mqtt and eKuiper are open source under LGPLv3 license. Neuron may run with these open source modules without an EMQ license. But all other commercial plugin modules require an official EMQ license to run without limitation.
A trial EMQ license can be download from our official website (opens new window). All available modules could be used with limitation on 100 connections and 1000 data tags for 15 days. If trial EMQ license is expired, you can apply the trial EMQ license via our official website again. However, a mailbox can only apply for a trial license up to two times.
Of course, you can also directly contact us (opens new window) to obtain the official license.
# License Installation
# Step 1 Check the hardware token
Check the hardware token, as shown below.
# Step 2 Install License
To install a license, as shown below.
- Click on the
Licensefrom the System Information drop-down box in the upper-right corner.
- Click on the
Uploadbutton to select the license file and then submit.
When applying for a valid license, you need to fill in the hardware token.
The pluggable modules of the commercial version cannot be used when the license has not been uploaded or the license has expired.
Users can apply for a trial license from official website by clicking on the
Apply, or contact our sales representatives to purchase a commercial license by clicking on the
# Step 3 Check over the License details
After the license is successfully installed, it will display the license information, as shown below.
The license page details includes following items.
Expire date, if the license has expired, the system would not work correctly anymore. Users must obtain a new valid license from official website,
Re-uploadthe new license as procedure above.
Limit on the maximum number of nodes, The maximum number of connection nodes that Neuron can create, a node can be either a southbound device or a northbound application.
Limit on the maximum number of tags, The maximum number of total data tags that Neuron can create.
Enabled Plugins, List of all the authorized pluggable modules for this license.Each commercial plugin module can be authorized independently in EMQ license.