Small, open-source gadgets for network people. Pocket tools that sniff, test and poke at the airwaves and the wires, built on ESP32 boards you can actually buy.
A Tamagotchi that feeds on Wi-Fi, Bluetooth and Zigbee. Carry it around, it listens (passively), levels up, collects hats, meets other goblins and warns you if a tracker is following you.
ESP32-C5Wi-Fi 6, 2.4 + 5 GHzBLE802.15.4
A few-dollar ESP32-C2 weather clock cube, reborn as a desk goblin that watches your network: happy on fast pings, panics when the internet drops, shouts "NEW FACE!" when a new device joins.
ESP32-C2Ping monitorNew-device alertsOTA
A DIY pocket Ethernet cable and network tester built around a ~$2 PHY with a TDR engine: cable faults and distance, DHCP, ping, traceroute and which switch port you're on.
ESP32LAN8742 TDRLLDP / CDPCustom PCB in testing
ND-1's big sibling: a Linux handheld network multitool on the Raspberry Pi CM5, with a 4-pair TDR test port, capture, iperf and the rest. First board, the TDR dongle, is at the fab.
Raspberry Pi CM5LinuxGigabit TDRKiCadTools made by someone who spends their days on networks, for the people who do the same.
Firmware, docs and build guides live on GitHub. Fork them, fix them, make them weirder.
Listening tools stay passive and private by design: no raw addresses or network names kept, ever.
