Circuit Documentation

Summary of the Circuit

This circuit integrates an ESP32 Wroom microcontroller with an APDS-9930 Proximity and Ambient Light Sensor. The ESP32 Wroom is a versatile microcontroller with Wi-Fi and Bluetooth capabilities, which can be used for a variety of IoT applications. The APDS-9930 sensor is capable of detecting the presence of an object as well as measuring ambient light levels. The sensor communicates with the ESP32 via the I2C protocol, utilizing the SCL and SDA lines for clock and data transmission, respectively.

Component List

ESP32 Wroom

• Description: A powerful microcontroller with Wi-Fi and Bluetooth capabilities, suitable for a wide range of applications.
• Pins:
  • 3V3
  • Reset
  • GPIO36
  • GPIO39
  • GPIO34
  • GPIO35
  • GPIO32
  • GPIO33
  • GPIO25
  • GPIO26
  • GPIO27
  • GPIO14
  • GPIO12
  • GND
  • GPIO13
  • GPIO9
  • GPIO10
  • GPIO11
  • 5V
  • GPIO23
  • GPIO22/SCL
  • GPIO1/TXD0
  • GPIO3/RXD0
  • GPIO21/SDA
  • GPIO19
  • GPIO18
  • GPIO5
  • GPIO17
  • GPIO16
  • GPIO4
  • GPIO0
  • GPIO2
  • GPIO15
  • GPIO8
  • GPIO7
  • GPIO6

APDS-9930 Proximity and Ambient Light Sensor

• Description: A sensor for detecting object proximity and measuring ambient light levels.
• Pins:
  • INT (not used)
  • SDA
  • SCL
  • VCC (3.3V)
  • GND
  • VL (not used)

Wiring Details

ESP32 Wroom

• 3V3 connected to APDS-9930 VCC (3.3V)
• GND connected to APDS-9930 GND
• GPIO22/SCL connected to APDS-9930 SCL
• GPIO21/SDA connected to APDS-9930 SDA

APDS-9930 Proximity and Ambient Light Sensor

• VCC (3.3V) connected to ESP32 Wroom 3V3
• GND connected to ESP32 Wroom GND
• SCL connected to ESP32 Wroom GPIO22/SCL
• SDA connected to ESP32 Wroom GPIO21/SDA

Documented Code

No code has been provided for the microcontroller. Typically, the code would initialize the I2C communication, configure the sensor, and implement the logic for reading the sensor data and responding to it. Since no code is available, it is recommended to develop firmware that includes the following:

• I2C initialization and configuration.
• Functions to read and write to the APDS-9930 registers.
• Interrupt handling if the INT pin is to be used in the future.
• Logic to process the proximity and ambient light data.
• Communication routines to send sensor data to other devices or services if needed.

Once the code is developed, it should be documented here with explanations for each function and routine, including setup and loop structures, interrupt service routines, and any libraries used for the ESP32 Wroom and APDS-9930 sensor.