Room Temperature Sensor Design
1:23
Below is the complete wiring summary that connects all the components in your design:
ESP32-WROOM-32D (U1):
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Power:
- Connect the ESP32's 3.3V output to all VDD connections of the DS18B20 and LCD (verify the LCD’s voltage rating; if it requires 5V, adjust accordingly).
- Tie the ESP32's Ground pin to the common Ground.
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DS18B20 Sensor (U2):
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4.7kΩ Pull-Up Resistor (R1):
- One terminal goes to the DS18B20 DQ (data) pin.
- The other terminal goes to the ESP32's 3.3V supply.
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16x2 LCD Display Module (LCD1 – WC1602A):
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Power Connections:
- VDD (pin 2): Connect to the same 3.3V (or 5V if your module requires it) supply used by the ESP32.
- VSS (pin 1): Connect to the common Ground.
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Control Signals (for 4-bit operation):
- RS (pin 4): Connect to an ESP32 GPIO (suggested IO13).
- R/W (pin 5): Tie directly to Ground.
- E (pin 6): Connect to an ESP32 GPIO (suggested IO14).
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Data Lines (4-bit mode):
- Connect the LCD data pins (D4 to D7; typically pins 11–14) to chosen ESP32 GPIOs. For example, you might use:
- LCD D4 → ESP32 IO27
- LCD D5 → ESP32 IO26
- LCD D6 → ESP32 IO25
- LCD D7 → ESP32 IO33
- Connect the LCD data pins (D4 to D7; typically pins 11–14) to chosen ESP32 GPIOs. For example, you might use:
-
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Common Ground:
- Use a dedicated Ground component to interconnect the ground pins of the ESP32, DS18B20, LCD, and any other modules.
With these net connections:
- The DS18B20's power (VDD) and data are correctly interfaced with the ESP32, with the essential 4.7kΩ pull-up ensuring proper one-wire communication.
- The LCD receives its power, signal, and data connections from the ESP32.
- All components share a common ground for proper signal reference.
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