• Open this site with HTTPS in Chrome or Edge on a laptop.
• Use a USB data cable. Close any serial monitor before installing.
• Serial port is not readable/writable — On the install page, click Connection stuck? Reset, unplug USB for 5 seconds, plug in again.
• No port in the list — Different cable or USB port; on Windows install CP210x or CH340 drivers if no COM port appears.
• Install hangs — Hold BOOT on the DevKit while starting the install; release when progress starts.
• Erase device off = update (keeps settings and history). Erase device on = factory reset.

• Until home Wi‑Fi is saved, the node runs an open setup network named LUMINA-EDU-xxxx (four characters are unique to your board).
• On that network, open http://192.168.4.1. Serial monitor at 115200 baud prints the setup AP name and dashboard IP.
• On the node, open Settings to set location, date & time, and home Wi‑Fi.

The installer includes dashboard files. Run Connect & Install Firmware again from the install page with Erase device off. If problems continue, factory reset once (Erase device on), then configure the node again.

The node expects a TSL2591 sensor (I2C address 0x29). Other modules such as the TSL2561 are not supported.

• Power: 3.3 V and GND (not 5 V).
• Wiring: SDA → GPIO 21, SCL → GPIO 22 on a standard ESP32 DevKit.
• Check connections; shorter wires often help in the classroom.
• Serial output at 115200 baud may show an I2C scan — an empty scan usually means wiring or power.

• Use 2.4 GHz Wi‑Fi (ESP32 does not use 5 GHz‑only networks).
• Re-enter the password in Settings, or tick Forget saved Wi‑Fi to return to setup mode only.
• Prefer WPA2 (or WPA2/WPA3 mixed). WPA3‑only routers often fail.
• Cannot see LUMINA-EDU-xxxx — Power-cycle the board; at 115200 baud look for [WiFi] Setup AP LUMINA-EDU-…. Install the latest firmware from this portal if the node never enters setup mode.

The sensor is not being read. Check wiring and power in Light sensor not detected. The dashboard may still open but values stay empty until the sensor works.

Not detected is normal in classroom setup mode or without a router. On home Wi‑Fi, the node checks for internet access; if it never connects, ensure the network allows the device online. Dashboard icons and styles work offline — they are stored on the node, not loaded from the internet.

• Open Data from the dashboard for stored sky readings (one row per 15 minutes).
• Logging needs a valid date & time in Settings (or NTP on home Wi‑Fi). The first row appears after a full 15-minute window closes.
• The first row after setup may only cover part of that window until the node has run for a full quarter-hour.
• Use Jump to day for a single calendar day, Load older for earlier samples, or Download CSV for the full log.
• History is kept in a separate flash region — normal firmware updates (Erase device off) do not erase it.

On the node, open Data → API Info for a list of /api/... JSON endpoints (sky, graph, connectivity, samples, CSV export). No password is required on the local network.