Circuit Documentation

Summary of the Circuit

This circuit integrates two GC9A01 display modules with an ESP32 Devkit V1 microcontroller. The ESP32 Devkit V1 serves as the central processing unit, controlling the displays through a series of digital connections. The displays are likely used to present visual data processed or received by the ESP32. The circuit is powered through the ESP32's 3.3V power supply, which is connected to the VCC pins of both GC9A01 modules, ensuring that all components operate at the same voltage level. Ground connections are shared across all devices to complete the power circuit.

Component List

GC9A01 Display Module

• Description: A display module, likely used for rendering visual data.
• Pins:
  • RST (Reset)
  • CS (Chip Select)
  • DC (Data/Command)
  • SDA (Serial Data)
  • SCL (Serial Clock)
  • GND (Ground)
  • VCC (Power Supply)

ESP32 Devkit V1

• Description: A microcontroller development board based on the ESP32 chip, featuring Wi-Fi and Bluetooth connectivity.
• Pins:
  • 3V3 (3.3V Power Output)
  • GND (Ground)
  • D15, D2, D4, D5, D18, D19, D21, D22, D23 (General Purpose Input/Output)
  • RX2, TX2, RX0, TX0 (Serial Communication)
  • EN (Enable)
  • VP, VN (Sensor Voltage Pins)
  • D34, D35, D32, D33, D25, D26, D27, D14, D12, D13 (General Purpose Input/Output)
  • VIN (Voltage Input)

Wiring Details

GC9A01 Display Module 1

• RST connected to ESP32 Devkit V1 pin D4
• CS connected to ESP32 Devkit V1 pin D15
• DC connected to ESP32 Devkit V1 pin D2
• SDA connected to ESP32 Devkit V1 pin D23
• SCL connected to ESP32 Devkit V1 pin D18
• GND connected to ESP32 Devkit V1 GND
• VCC connected to ESP32 Devkit V1 3V3

GC9A01 Display Module 2

• RST connected to ESP32 Devkit V1 pin D4
• CS connected to ESP32 Devkit V1 pin D14
• DC connected to ESP32 Devkit V1 pin D2
• SDA connected to ESP32 Devkit V1 pin D23
• SCL connected to ESP32 Devkit V1 pin D18
• GND connected to ESP32 Devkit V1 GND
• VCC connected to ESP32 Devkit V1 3V3

ESP32 Devkit V1

• D4 connected to RST pins of both GC9A01 Display Modules
• D15 connected to CS pin of GC9A01 Display Module 1
• D2 connected to DC pins of both GC9A01 Display Modules
• D23 connected to SDA pins of both GC9A01 Display Modules
• D18 connected to SCL pins of both GC9A01 Display Modules
• GND connected to GND pins of both GC9A01 Display Modules
• 3V3 connected to VCC pins of both GC9A01 Display Modules
• D14 connected to CS pin of GC9A01 Display Module 2

Documented Code

No code was provided for the microcontrollers in the circuit. To operate the displays, code would typically initialize the display drivers, set up the communication protocol (likely SPI, given the SDA and SCL pins), and include functions to manage the display content. Since no code is available, it is recommended to develop or obtain the necessary firmware to interface the ESP32 Devkit V1 with the GC9A01 display modules.