M5Stack ESP32 Oscilloscope

## About

• Fully functional Dual Channel Oscilloscope running on M5Stack ESP32 development kit
• The project is made in Visual Studio using vMicro Plugin: http://www.visualmicro.com/
• Channel 1 Input: Pin 35
• Channel 2 input: Pin 36

Testing and callibration

• PWM signal Output: Pin 2
• SignaDelta Output: Pin 5

Oscilloscope Menu:

1. Run/Stop
2. Channel 1 range
3. Channel 2 range
4. Channel 1 and 2 rate
5. Channel 1 mode (Normal, Inverted, Off)
6. Channel 2 mode (Normal, Inverted, Off)
7. Channel 1 Offset
8. Channel 2 Offset
9. Trigger Channel: 1 or 2
10. Trigger mode Auto, Normal, Scan
11. Trigger Level
12. Trigger Edge: Rising (UP) or Falling (DN)

• Key B: Menu selection
• Key A: Selected item -
• Key C: Selected item +

Warning

- ESP32 MAXIMUM GPIO input voltage is 3.3V

- Feeding higher voltages on INPUT pin’s can damage the chip

- Consider using a voltage divider to measure higher voltage signals