This guide covers configuring the Index AMI HW3 as a WireGuard peer from the Noatec app. The WireGuard server must be active before you start — see the server guide if it is not ready yet.
Before you start
- WireGuard server installed and active with UDP port 51820 open.
- Server public key and endpoint (IP:port) provided by the administrator.
- Tunnel IP assigned to the Index AMI (e.g. 10.8.0.2/32).
- Index AMI HW3 with an active 4G connection.
Open VPN settings
- Open the configuration app (Android or desktop tool).
- Go to Settings → VPN → WireGuard and enable WireGuard.
- The app automatically generates the Index AMI key pair.
- Copy the public key shown on screen — you need it in the next step.
The private key never leaves the device. You only share the public key.
Key exchange
Send the Index AMI public key to the WireGuard server administrator. The administrator adds it to the [Peer] block of the wg0.conf file and restarts the interface. You cannot complete the following steps until the server has your key registered.
Configure the server parameters
Enter the server details provided by the administrator:
- Endpoint:
(server public IP):51820 - Public Key:
(server public key) - Allowed IPs:
10.8.0.0/24 - Index AMI tunnel IP:
10.8.0.2/32 (assigned by the administrator) - PersistentKeepalive:
25 s — keeps the tunnel alive through 4G NAT
Verify the handshake
- Tap Save — the Index AMI initiates the handshake within 5 seconds.
- Go to Overview → Connectivity Status: confirm status 'Connected'.
- If there is no handshake after 2 minutes, check that UDP 51820 is open on the server firewall and that the Index AMI public key is registered in the server's wg0.conf.
Meter readings continue to be sent over the direct TCP channel independently of the VPN tunnel.