# Arduino Nano ESP32 Modulino Hub ## Description Modular 3.3V Arduino Nano ESP32 controller with I2C-connected Modulino Buttons and LED Pixels nodes plus Qwiic JST-SH daisy-chain connector. ## Project Details - **Owner:** defaultusertryguy - **Created:** 4/24/2026 - **Last Updated:** 4/27/2026 - **Visibility:** Public - **Stars:** 1 ## Key Components ### J1 — [QWIIC I2C JST Connector](https://www.flux.ai/vasy_skral/qwiic-i2c-jst-connector~d55.md) - Manufacturer Part Number: SM04B-SRSS-TB - Manufacturer Name: JST Sales America Inc. - Role: I2C Daisy Chain Connector - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/JST%20PDFs/SR%20Connector.pdf - Role Details: Qwiic JST-SH 4-pin connector using standard GND, 3.3V, SDA, SCL pinout for modular daisy chaining - Package: JST-SH-4 - Implementation Details: Place at I2C edge opposite 12V sensor connector. - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### J2 — [691137710004](https://www.flux.ai/adrian95/691137710004~pa.md) - Role: E3JK Sensor Connector - Package: Terminal Block - Role Details: 4-pin screw terminal for external E3JK laser wiring with industrial wire capacity; use pins for 12V, GND, SIG, and spare/NC or future shield as needed. - Manufacturer Name: Würth Elektronik - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.we-online.com/components/products/datasheet/691137710004.pdf - Part Type: Connector - Manufacturer Part Number: 691137710004 - Implementation Details: Pin_1=12V, Pin_2=GND, Pin_3=SIG, Pin_4=NC; silkscreen must clearly mark each terminal on PCB. **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### J3 — [Connector 01x04 Horizontal](https://www.flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md) - Part Type: Connector - Manufacturer Part Number: Generic 4-pin 2.54mm header **Pins:** - PIN_1 [pin 1] - PIN_2 [pin 2] - PIN_3 [pin 3] - PIN_4 [pin 4] ### U1 — [ABX00083](https://www.flux.ai/adrian95/abx00083~mdb.md) - Datasheet URL: https://docs.arduino.cc/resources/datasheets/ABX00083-datasheet.pdf - Manufacturer Name: Arduino - Role Details: Arduino Nano ESP32 central controller running the shared 3.3V I2C bus - Role: Main Controller - Manufacturer Part Number: ABX00083 - Part Type: Development Board - License: https://creativecommons.org/licenses/by/4.0/ - Implementation Details: Arduino Nano ESP32 central controller on shared 3.3V I2C bus; D2 reserved as E3JK digital sensor input - Package: Arduino Nano **Pins:** - +3V3_ [pin 2] - A0 [pin 4] - A1 [pin 5] - A2 [pin 6] - A3 [pin 7] - A4 [pin 8] - A5 [pin 9] - A6 [pin 10] - A7 [pin 11] - BOOT0 [pin 3] - BOOT1 [pin 13] - D0/TX [pin 16] - D1/RX [pin 17] - D10_/_CS [pin 28] - D11_/_COPI [pin 29] - D12_/_CIPO [pin 30] - D13_/_SCK_ [pin 1] - D2 [pin 20] - D3 [pin 21] - D4 [pin 22] - D5 [pin 23] - D6 [pin 24] - D7 [pin 25] - D8 [pin 26] - D9 [pin 27] - GND_1 [pin 14] - GND_2 [pin 19] - RST [pin 18] - VBUS [pin 12] - VIN [pin 15] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/defaultusertryguy/arduino-nano-esp32-modulino-hub~ph](https://www.flux.ai/defaultusertryguy/arduino-nano-esp32-modulino-hub~ph).* --- *Generated from [https://www.flux.ai/defaultusertryguy/arduino-nano-esp32-modulino-hub~ph](https://www.flux.ai/defaultusertryguy/arduino-nano-esp32-modulino-hub~ph)*