Internet Monitor

Hardware

Primary target

• Waveshare ESP32-S3 (docs)
• W5500 Ethernet Module

Integrated ethernet but w/o display

• Olimex ESP32-POE
• Olimex ESP32-POE-ISO

Test procedure

1. Check physical link
   • Ethernet unplugged?
2. Run DHCP / IPv4 config
   • IP assigned?
   • Subnet?
   • Gateway?
   • DNS server?
3. Run SLAAC / IPv6 config
   • IP assigned?
   • Subnet?
   • Gateway?
   • DNS server?
4. Test local Gateway
   • Router reachable? IPv4, IPv6
5. Routing/Uplink
   • Ping 1.1.1.1, 8.8.8.8, 9.9.9.9
   • Ping 2606:4700:4700::1111, 2001:4860:4860::8888, 2620:fe::fe
6. DNS
   • Resolve google.com, cloudflare.com, example.com
   • Timeout?
   • NXDOMAIN?
7. S2S VPN
   • Ping other side
8. Packet throughput
9. Measure latency
10. Measure temperature inside rack

Display

🟢 ONLINE
Latency: 23ms
Packet loss: 4.2%
IPv4: 192.168.0.123/24
IPv6: 2001:d8::1234:5678:90ab:cdef/64
Temperature: 42°C

Future ideas

• Prometheus endpoint
• Test Wifi

Build

1. Setup ESP IDF
   • Using Nix

     nix develop
     

   • Manually
     • Check correct version in flake
     • Setup IDF per docs: https://docs.espressif.com/projects/esp-idf/en/stable/esp32/get-started/index.html#installation
2. Configure?
3. Compile
4. Flash