BME280 ESP8266 WiFi Ultra Low Power v1 Firmware

What this tool does:

Displays live Serial.print() output from USB‑serial devices (ESP32, Arduino, RP2040, etc.) using your browser’s Web Serial API.

Your device must appear as a USB serial / COM port.

If you see no output:

• Ensure the baud rate matches Serial.begin() in firmware
• Click Connect after the device finishes booting
• Press the device RESET / EN button after connecting
• Close Arduino Serial Monitor or other apps using the port