Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32 microcontroller, a 18650 Li-ion Battery, a DHT22 temperature and humidity sensor, a generic temperature sensor, and a 10k Ohm resistor. The circuit is designed to measure temperature and humidity and is powered by a 18650 Li-ion battery.

Component List

1. 18650 Li-ion Battery

   • Description: Rechargeable lithium-ion battery.
   • Pins: +, -

2. ESP32

   • Description: A low-cost, low-power system on a chip microcontroller with integrated Wi-Fi and dual-mode Bluetooth.
   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, VIN, 3V3, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, BOOT

3. Temperature Sensor

   • Description: Generic temperature sensor.
   • Pins: Temp GND Black, Temp VDD Red, Temp DQ Data Yellow

4. DHT22

   • Description: Temperature and humidity sensor.
   • Pins: +, Out, -

5. Resistor

   • Description: 10k Ohm resistor.
   • Pins: pin1, pin2
   • Properties: Resistance: 10k Ohms

Wiring Details

18650 Li-ion Battery

• Pin - is connected to:

  • ESP32 GND
  • DHT22 -
  • Temperature Sensor Temp GND Black

• Pin + is connected to:

  • ESP32 VIN
  • DHT22 +
  • Temperature Sensor Temp VDD Red
  • Resistor pin1

ESP32

• Pin GND is connected to:

  • 18650 Li-ion Battery -
  • DHT22 -
  • Temperature Sensor Temp GND Black

• Pin VIN is connected to:

  • 18650 Li-ion Battery +
  • DHT22 +
  • Temperature Sensor Temp VDD Red
  • Resistor pin1

• Pin D18 is connected to:

  • DHT22 Out

• Pin D19 is connected to:

  • Temperature Sensor Temp DQ Data Yellow
  • Resistor pin2

Temperature Sensor

• Pin Temp GND Black is connected to:

  • ESP32 GND
  • 18650 Li-ion Battery -
  • DHT22 -

• Pin Temp VDD Red is connected to:

  • ESP32 VIN
  • 18650 Li-ion Battery +
  • DHT22 +
  • Resistor pin1

• Pin Temp DQ Data Yellow is connected to:

  • ESP32 D19
  • Resistor pin2

DHT22

• Pin - is connected to:

  • ESP32 GND
  • 18650 Li-ion Battery -
  • Temperature Sensor Temp GND Black

• Pin + is connected to:

  • ESP32 VIN
  • 18650 Li-ion Battery +
  • Temperature Sensor Temp VDD Red
  • Resistor pin1

• Pin Out is connected to:

  • ESP32 D18

Resistor

• Pin pin1 is connected to:

  • ESP32 VIN
  • 18650 Li-ion Battery +
  • DHT22 +
  • Temperature Sensor Temp VDD Red

• Pin pin2 is connected to:

  • ESP32 D19
  • Temperature Sensor Temp DQ Data Yellow

Code

No code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and code documentation.