Circuit Documentation

Summary

This circuit integrates a DS18B20 1-Wire Temperature Sensor Probe Cable with an ESP32 microcontroller and includes a pull-up resistor. The DS18B20 sensor is a digital temperature sensor that communicates over a 1-Wire bus that requires only one data line (and ground) for communication with the microcontroller. The ESP32 is a versatile microcontroller with Wi-Fi and Bluetooth capabilities, which can be used for various IoT applications. The pull-up resistor is necessary for the 1-Wire communication protocol to function correctly.

Component List

DS18B20 1-Wire Temperature Sensor Probe Cable

• Pins: shield, GND, DQ, VDD
• Description: A digital temperature sensor that communicates over a 1-Wire interface.

Resistor

• Pins: pin1, pin2
• Resistance: 4700 Ohms
• Description: A pull-up resistor used to maintain the data line at a high level when no device is pulling it low.

ESP32 (30 pin)

• Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3
• Description: A microcontroller with Wi-Fi and Bluetooth capabilities, suitable for a wide range of applications, including IoT devices.

Wiring Details

DS18B20 1-Wire Temperature Sensor Probe Cable

• shield: Connected to the pull-up resistor (pin1) and ESP32 pin D2.
• GND: Connected to ESP32 GND.
• DQ: (Data line not explicitly mentioned in the net list, assumed to be connected to the microcontroller for communication.)
• VDD: Connected to the pull-up resistor (pin2) and ESP32 3V3.

Resistor

• pin1: Connected to DS18B20 shield.
• pin2: Connected to DS18B20 VDD and ESP32 3V3.

ESP32 (30 pin)

• D2: Connected to DS18B20 shield and pull-up resistor (pin1).
• GND: Connected to DS18B20 GND.
• 3V3: Connected to DS18B20 VDD and pull-up resistor (pin2).

Documented Code

No code was provided for the microcontroller. For this circuit to function, embedded code would need to be written and uploaded to the ESP32 to initialize and read data from the DS18B20 temperature sensor. The code would typically include initializing the 1-Wire bus, reading temperature values, and possibly transmitting the data over Wi-Fi or Bluetooth for remote monitoring.

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Please note that the actual implementation of the code would depend on the specific requirements of the application and the development environment used for programming the ESP32.