Actualiser mystrom-wifi-button-plus/README.md

mystrom-wifi-button-plus/README.md

@@ -13,19 +13,34 @@ JP1
 
 ## Schematics
 
-```
-━━━┓
-   ┣━ I2C bus (GPIO21/GPIO22) ━ SHTC3 
- E ┣━ Top left key (GPIO38) & deep sleep wake up
- S ┣━ Top right key (GPIO39)
- P ┣━ Bottom left key (GPIO37)
-   ┣━ Bottom right key (GPIO36)
- 3 ┣━ Red LED (GPIO4)
- 2 ┣━ Green LED (GPIO18)
-   ┣━ White LED (GPIO23)
-   ┣━ USB power probe (GPIO33)
-   ┣━ ADC  ━ Battery probe (GPIO32) 
-━━━┛
+```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
+    }
 
 ```