Curiosity winning over fatigue, Chen pulled up the live feed for Security-Node-04 . The feed was black. "Connection Lost."
| Problem | Likely Cause | Solution | | :--- | :--- | :--- | | | QR code is too complex or too small | Use error correction "High (H)" on QR generator. Ensure good lighting. | | No "Camera Online" message | Wi-Fi credentials missing from QR | The QR must contain both Wi-Fi SSID/password AND Telegram token. Some cameras require two separate QR scans. | | "Bot token invalid" error | Token has spaces or wrong characters | Copy-paste from BotFather exactly. Hyphens and colons matter. | | Telegram sends no photos | Snapshot URL requires authentication | Use a URL with basic auth: http://user:pass@192.168.1.100/snapshot.jpg | | Camera offline after restart | DHCP changed camera's IP address | Set a static IP on the camera or use a DDNS service. | | QR code works but only once | Camera stores token in volatile memory | Check camera manual for "save configuration" or "reboot to persist." | ip camera qr telegram work
Chen pulled the image back up. He zoomed in on the black and white modules of the QR code. At first, it looked standard. But as he zoomed in to 500%, he realized the black squares weren't solid black. They were tiny text characters. Curiosity winning over fatigue, Chen pulled up the