ESP-Scope — Web Oscilloscope for ESP32

Features

Real-time visualization

Signal waveforms rendered live in your browser over WiFi.

Adjustable sample rate

1 Hz to 83 333 Hz with configurable ADC attenuation.

Crosshair & trigger

Precise measurements with a crosshair cursor and adjustable trigger level.

Built-in test signal

PWM output on D1 at a configurable frequency — no external source needed to get started.

WiFi setup from browser

Starts as a WiFi access point. Join your home network via the web UI — no serial console required.

Browser controls

Reset settings, reconfigure WiFi, or power off the device — all from the interface.

Connect your ESP32 via USB and install directly — no drivers or toolchain needed.
Requires Chrome, Edge, or Opera on desktop.

Select firmware version

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Supported boards in this release

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Your browser does not support WebSerial. Please use Chrome, Edge, or Opera on desktop.

The correct binary is picked automatically for your chip.

Connect to the AP

ESP-Scope starts as a WiFi access point. Connect your device to the ESP-Scope network.

Open the interface

Navigate to http://esp-scope in your browser. You may need a .local suffix depending on your OS.

Optionally join your WiFi

Tap WiFi in the UI to enter your SSID and password. The device reboots and joins your network.

Connect a signal

Probe from ADC0. Use the built-in test signal on D1 to verify the setup first.

LED behaviour	State
Continuously lit	Connecting to WiFi / starting wireless AP
1 s equal flash	AP mode — connect to the "ESP-Scope" network
Slow, brief flashes	Connected to the WiFi SSID set in the UI
Rapid, brief flashes	Sending data to an active client