# myStrom's WiFi Button Plus ESPHome configuration yaml

## Flash

```
JP1
(○) GPIO0      ➙ GND (Bootloader mode)
[○] TX (GPIO1) ➙ Programmer's RX
[○] RX (GPIO3) ➙ Programmer's TX
[○] VCC        ➙ +3.3V
[○] GND        ➙ 0V (GND)
```

## Schematics

```mermaid
erDiagram
    ESP32 {
    }

    ESP32 ||--|| GPIOs : ""
    ESP32 ||--|| I2C : ""
    ESP32 ||--|| ADC : ""

    I2C {
        GPIO21-GPIO22 SHTC3
    }


    ADC {
        GPIO32  Battery-probe
    }

    GPIOs {
        GPIO38 Top-left-key
        GPIO39 Top-right-key
        GPIO37 Bottom-left-key
        GPIO36 Bottom-right-key
        GPIO04 Red-LED
        GPIO18 Green-LED
        GPIO23 White-LED
        GPIO33 USB-power-probe
    }

```

## Notes

 - GPIO13, GPIO14 , GPIO19 and GPIO27 are reserved for an Eink display.
 - GPIO9 and GPIO10 are reserved for the QuadIO flash mode.
 - GPIO25 and GPIO26 are reserved for an unknown device.
 - GPIO34 is reserved for the unpopulated SW5.
 - GPIO35 is reserved for the unpopulated and unknown U7.
 - There are traces and footprints for a buzzer.