SIMUT — Wiring Guide

Pinout Diagram

                    Raspberry Pi Pico W
                 ┌────────────────────────┐
                 │  ╭──────────────────╮  │
 DS18B20 SLOT0 ──┤0 │                  │  │
 DS18B20 SLOT1 ──┤1 │                  │  │
 DS18B20 SLOT2 ──┤2 │                  │  │
 DS18B20 SLOT3 ──┤3 │                  │  │
 DS18B20 SLOT4 ──┤4 │                  │  │
 DS18B20 SLOT5 ──┤5 │                  │  │
 DS18B20 SLOT6 ──┤6 │                  │  │
 DS18B20 SLOT7 ──┤7 │                  │  │
 DS18B20 SLOT8 ──┤8 │                  │  │
 DS18B20 SLOT9 ──┤9 │                  │  │
 DHT22 SLOT10  ──┤10│     RP2040       │  │
                 |  │                  │  │
                 │  │    Dual-Core     │  │
    TFT MISO   ──┤16│    133 MHz       │  │
    TFT CS     ──┤17│                  │  │── GND ──── Common Ground
    TFT SCK    ──┤18│                  │  │── 3V3 ──── Display VCC
    TFT MOSI   ──┤19│                  │  │── 3V3 ──── Sensors VCC
    TFT DC     ──┤20│                  │  │
    TFT RST    ──┤21│                  │  │
    Touch CS   ──┤22│                  │  │
                 │  │                  │  │
    Buzzer     ──┤26│                  │  │
    Touch IRQ  ──┤27│                  │  │
                 │  ╰──────────────────╯  │
                 │        ┌──────┐        │
                 │        │ micro│        │
                 │        │ USB  │        │
                 │        └──────┘        │
                 └────────────────────────┘

Pin Reference

GPIO	Function	Connection
0	DS18B20 SLOT0 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
1	DS18B20 SLOT1 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
2	DS18B20 SLOT2 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
3	DS18B20 SLOT3 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
4	DS18B20 SLOT4 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
5	DS18B20 SLOT5 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
6	DS18B20 SLOT6 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
7	DS18B20 SLOT7 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
8	DS18B20 SLOT8 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
9	DS18B20 SLOT9 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
10	DHT22 SLOT10 (1-Wire)	Sensor data line + 4.7 kΩ pull-up to 3V3
16	SPI MISO	TFT MISO
17	SPI CS	TFT CS
18	SPI SCK	TFT SCK
19	SPI MOSI	TFT MOSI
20	GPIO	TFT DC (Data/Command)
21	GPIO	TFT RST (Reset)
22	SPI CS	XPT2046 Touch CS
26	PIO	Passive Buzzer (+)
27	GPIO	XPT2046 Touch IRQ

Power

• Power the Pico W via USB (5 V)
• Display and sensors powered from Pico W’s 3V3 pin
• Average consumption: 80–120 mA @ 5 V (display active, WiFi connected)
• Peak consumption: ~250 mA (telemetry burst + TFT render)

Wiring Checklist

• All DS18B20 sensors have 4.7 kΩ pull-up resistor on data line to 3V3
• TFT shares SPI bus with Touch controller (separate CS pins: GPIO 17 and GPIO 22)
• Common ground between Pico W, display, and all sensors
• Passive buzzer connected between GPIO 26 and GND (no resistor needed — PIO-driven)
• Use quality USB cable (≥22 AWG) — voltage drops cause reboots

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See User Manual for complete hardware setup instructions.