# arduino esp32 hc05 ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** romak - **Created:** 6/10/2025 - **Last Updated:** 6/10/2025 - **Visibility:** Public ## Key Components ### U1 — [Arduino-UNO-R3](https://www.flux.ai/jecstronic/arduino-uno-r3~kf3.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Arduino%20PDFs/A000066_Web.pdf - Part Type: Development Board - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Arduino - Manufacturer Part Number: Arduino-UNO-R3 **Pins:** - +3V3 [pin 4] - +5V [pin 5] - AREF [pin 30] - D0/RX [pin 15] - D1/TX [pin 16] - D10 [pin 25] - D11 [pin 26] - D12 [pin 27] - D13 [pin 28] - D14/A0 [pin 9] - D15/A1 [pin 10] - D16/A2 [pin 11] - D17/A3 [pin 12] - D18/A4 [pin 13] - D18/SDA [pin 31] - D19/A5 [pin 14] - D19/SCL [pin 32] - D2 [pin 17] - D3 [pin 18] - D4 [pin 19] - D5 [pin 20] - D6 [pin 21] - D7 [pin 22] - D8 [pin 23] - D9 [pin 24] - GND [pin 6] - GND [pin 29] - GND [pin 7] - IOREF [pin 2] - NC [pin 1] - RESET [pin 3] - VIN [pin 8] ### U2 — [ESP32-DEVKIT-V1](https://www.flux.ai/jharwinbarrozo/esp32-devkit-v1~7xd.md) - Manufacturer Part Number: ESP32-DEVKIT-V1 - Part Type: Module - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf - Manufacturer Name: Espressif Systems - Symbol Style: Parametric **Pins:** - 3V3 [pin 1] - D12 [pin 27] - D13 [pin 28] - D14 [pin 26] - D15 [pin 3] - D18 [pin 9] - D19 [pin 10] - D2 [pin 4] - D21 [pin 11] - D22 [pin 14] - D23 [pin 15] - D25 [pin 23] - D26 [pin 24] - D27 [pin 25] - D32 [pin 21] - D33 [pin 22] - D34 [pin 19] - D35 [pin 20] - D4 [pin 5] - D5 [pin 8] - EN [pin 16] - GND [pin 2] - GND_1 [pin 29] - RX0 [pin 12] - RX2 [pin 6] - TX0 [pin 13] - TX2 [pin 7] - VIN [pin 30] - VN [pin 18] - VP [pin 17] ### U3 — [HC-05](https://www.flux.ai/jecstronic/hc-05~ea.md) - Manufacturer Name: Itead Studio - Datasheet URL: https://www.snapeda.com/parts/HC-05/ITead%20Studio/datasheet/ - Manufacturer Part Number: HC-05 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Module **Pins:** - ~RESETB [pin 11] - ~SPI_CSB [pin 16] - ~UART-CTS [pin 3] - ~UART-RTS [pin 4] - 3.3_VCC [pin 12] - AIO[0] [pin 9] - AIO[1] [pin 10] - GND [pin 13] - GND [pin 21] - GND [pin 22] - PCM-CLK [pin 5] - PCM-IN [pin 7] - PCM-OUT [pin 6] - PCN-SYNC [pin 8] - PIO[0] [pin 23] - PIO[1] [pin 24] - PIO[10] [pin 33] - PIO[11] [pin 34] - PIO[2] [pin 25] - PIO[3] [pin 26] - PIO[4] [pin 27] - PIO[5] [pin 28] - PIO[6] [pin 29] - PIO[7] [pin 30] - PIO[8] [pin 31] - PIO[9] [pin 32] - SPI_CLK [pin 19] - SPI_MISO [pin 18] - SPI_MOSI [pin 17] - UART-RX [pin 2] - UART-TX [pin 1] - USB_- [pin 15] - USB_+ [pin 20] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/romak/arduino-esp32-hc05~qp](https://www.flux.ai/romak/arduino-esp32-hc05~qp).* --- *Generated from [https://www.flux.ai/romak/arduino-esp32-hc05~qp](https://www.flux.ai/romak/arduino-esp32-hc05~qp)*