Verifying Connection

Test connectivity to the Ola S1 Pro onboard gRPC diagnostics daemon on TCP port 50005.

The head unit’s background daemon (/vendor/bin/diagnostics_server) listens on TCP port 50005. It speaks standard gRPC over cleartext HTTP/2 without authentication tokens or TLS certificates.

Before executing commands, we verify that your computer can reach this port and establish a valid gRPC handshake.

TCP Port Check

First, verify that the TCP handshake succeeds on port 50005:

Test-NetConnection -ComputerName "<scooter-ip>" -Port 50005

If successful, TcpTestSucceeded will return True.

nc -6 -zv <scooter-ip> 50005

A successful connection outputs:

Connection to <scooter-ip> 50005 port [tcp/*] succeeded!

nc -6 -G 3 -zv <scooter-ip> 50005

A successful connection outputs:

Connection to <scooter-ip> port 50005 [tcp/*] succeeded!

gRPC Handshake Test

Once the TCP port responds, send a gRPC call to verify the service is accepting RPC messages.

Using the Bundled Tool (`s1util`)

Download it here:

Install grpcio, protobuf and psutil:
Terminal window
```
pip install grpcio protobuf psutil
```

Execute the id command on the scooter:

python s1util.py exec --host <scooter-ip> "id"

Expected response:

uid=0(root) gid=0(root) groups=0(root),1000(system) context=u:r:shell:s0

Troubleshooting Common Issues

Connection Refused

Check if the scooter screen went to sleep. Press the power button to wake it up.
Verify that the scooter is still connected to the same Wi-Fi SSID.

Connection Timed Out

Ensure your router does not have “AP Isolation” or “Client Isolation” enabled. * Try switching both devices to a mobile hotspot where client-to-client traffic is permitted by default.

Invalid Argument / No Route

Ensure you appended the correct %scope identifier for your network interface.
On Linux/macOS, verify the interface name using ip link or ifconfig.

Next Steps

With confirmed connectivity to the diagnostics server, proceed to pair your ADB public key and enable wireless ADB.