# ESP32 Safety Sensor Hub
## Description
ESP32 DevKit V1 sensor hub powered from a 12V barrel jack through an LM2596 5V buck converter, with gas, temperature, flame, thermal camera, OLED, relay outputs, buzzer, and ESP32-CAM connections.
## Project Details
- **Owner:** mateti
- **Created:** 6/27/2026
- **Last Updated:** 7/8/2026
- **Visibility:** Public
## Key Components
### BZ1 — [s8550 buzzer_Vertical](https://www.flux.ai/jecstronic/s8550-buzzervertical~zcr.md)
- Datasheet URL: https://datasheet.lcsc.com/lcsc/2108142230_IDCHIP-S8550_C2848179.pdf
- License: https://creativecommons.org/licenses/by/4.0/
- Manufacturer Name: Kuongshun
- Part Type: Module
- Manufacturer Part Number: S8550 Buzzer Module
- Role: Active buzzer output
**Pins:**
- GND [pin 1]
- I/O [pin 2]
- VCC [pin 3]
### D1 — [SS34](https://www.flux.ai/lcsc/ss34~6q67.md)
- JLCPCB Part Class: Extended Part
- Forward Voltage: 0.3V to 0.45V
- Role Details: Series Schottky after input fuse
- Manufacturer Name: UMW(友台半导体)
- Package or Case Code: SMB_L4.3-W3.6-LS5.4-RD
- Part Type: Schottky Barrier Diodes (SBD)
- Reverse Voltage: 40V
- Manufacturer Part Number: SS34
- Datasheet URL: https://www.lcsc.com/datasheet/C2758511.pdf
- Diode Type: Schottky
- LCSC Part Number: C2758511
- Role: Reverse Polarity Protection
**Pins:**
- A [pin 2]
- K [pin 1]
### D3 — [SMBJ15A-13-F](https://www.flux.ai/lcsc/smbj15a-13-f~8gof.md)
- LCSC Part Number: C135046
- Product Info Url: https://lcsc.com/product-detail/TVS_DIODES_SMBJ15A-13-F_SMBJ15A-13-F_C135046.html
- Role Details: 12V input transient suppression to GND
- JLCPCB Part Class: Extended Part
- Manufacturer Name: DIODES(美台)
- Part Type: TVS
- Manufacturer Part Number: SMBJ15A-13-F
- Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Diodes-Incorporated-SMBJ15A-13-F_C135046.pdf
- Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD
- Role: Clamping
**Pins:**
- A [pin 2]
- K [pin 1]
### D6 — [PESD3V3L5UY](https://www.flux.ai/kicad-part-library/pesd3v3l5uy~ysh.md)
- Datasheet URL: https://assets.nexperia.com/documents/data-sheet/PESDXL5UF_V_Y.pdf
- Manufacturer Name: Texas Instruments Inc.
- Manufacturer Part Number: PESD3V3L5UY
- Role Details: ESD protection for external 3.3V signal lines
- Role: Protection
- Package or Case Code: SOT-363_SC-70-6
**Pins:**
- A [pin 2]
- K1 [pin 1]
- K2 [pin 3]
- K3 [pin 4]
- K4 [pin 5]
- K5 [pin 6]
### F1 — [0ZCF0200AF2C](https://www.flux.ai/adrian95/0zcf0200af2c~eal.md)
- Role Details: 12V input resettable fuse before reverse polarity protection
- Manufacturer Name: BelFuse
- Datasheet URL: https://belfuse.com/resources/datasheets/circuitprotection/ds-cp-0zcf-series.pdf
- Role: Protection
- Package or Case Code: FUSC7451X80N
- Part Type: Fuse
- License: https://creativecommons.org/licenses/by/4.0/
- Manufacturer Part Number: 0ZCF0200AF2C
**Pins:**
- ~ [pin 2]
- ~ [pin 1]
### IC1 — [MAX3485ESA+](https://www.flux.ai/lcsc/max3485esaplus~baoy.md)
- LCSC Part Number: C1545222
- Package or Case Code: SO-8_L4.9-W3.9-P1.27-LS6.0-BL
- Manufacturer Part Number: MAX3485ESA+
- Manufacturer Name: MAXIM(美信)
- Symbol Style: parametric-v1
- Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/max3483-max3491.pdf
- Role: Logic-level Shifting
- Part Type: Integrated Circuit
- Role Details: Optional half-duplex RS485 interface
- JLCPCB Part Class: Extended Part
**Pins:**
- ~{RE} [pin 2]
- A [pin 6]
- B [pin 7]
- DE [pin 3]
- DI [pin 4]
- GND [pin 5]
- RO [pin 1]
- VCC [pin 8]
### J1 — [DC-005](https://www.flux.ai/cherepanyadima/dc-005.md)
- Part Type: Connectors
- Manufacturer Name: Best Inc
- Manufacturer Part Number: DC-005
- Datasheet URL: https://www.snapeda.com/parts/DC-005/Best%20Inc./datasheet/
- Role: 12V input connector
**Pins:**
- ~ [pin 2]
- ~ [pin 4]
- ~ [pin 3]
### J10 — [TSW-106-07-G-S](https://www.flux.ai/adrian95/tsw-106-07-g-s~giw.md)
- Connector Pitch: 2.54mm
- Role Details: Expansion or display header
- Role: Connector
- Manufacturer Name: Samtec
- License: https://creativecommons.org/licenses/by/4.0/
- Connector Rows: 1
- Connector Gender: Male
- Datasheet URL: https://suddendocs.samtec.com/catalog_english/tsw_th.pdf
- Manufacturer Part Number: TSW-106-07-G-S
- Part Type: Connector
- Connector Type: Headers and Wire Housings
- Connector Positions: 6
**Pins:**
- 01 [pin 01]
- 02 [pin 02]
- 03 [pin 03]
- 04 [pin 04]
- 05 [pin 05]
- 06 [pin 06]
### J11 — [Phoenix Contact 1757242](https://www.flux.ai/adrian95/phoenix-contact-1757242~wl2.md)
- Role: Connector
- Manufacturer Name: Phoenix Contact
- License: https://creativecommons.org/licenses/by/4.0/
- Manufacturer Part Number: 1757242
- Role Details: RS485 A/B screw terminal
- Datasheet URL: https://www.phoenixcontact.com/product/pdf/api/v1/MTc1NzI0Mg?_realm=us&_locale=en-US&blocks=commercial-data%2Ctechnical-data%2Cdrawings%2Capprovals%2Cclassifications%2Cenvironmental-compliance-data%2Call-accessories
- Part Type: Connector
**Pins:**
- Pin_1 [pin 1]
- Pin_2 [pin 2]
### J12 — [Pin Socket 01x08 2.54mm Vertical MPU6050](https://www.flux.ai/hilbert145/pin-socket-01x08-2p54mm-vertical-mpu6050~9a.md)
- License: https://creativecommons.org/licenses/by/4.0/
- Role: Expansion connector
- Part Type: Connector
- Role Details: Future 7-inch touchscreen HMI header: 5V, 3V3, GND, I2C SDA/SCL, UART TX/RX, spare/enable GPIO
**Pins:**
- ADO [pin 7]
- GND [pin 2]
- INT [pin 8]
- SCL [pin 3]
- SDA [pin 4]
- VCC [pin 1]
- XCL [pin 6]
- XDA [pin 5]
### J2 — [Connector 01x04 Horizontal](https://www.flux.ai/jharwinbarrozo/connector-01x04-horizontal~h0.md)
- Part Type: Connector
- Role: MQ-2 gas sensor module header
**Pins:**
- PIN_1 [pin 1]
- PIN_2 [pin 2]
- PIN_3 [pin 3]
- PIN_4 [pin 4]
### J3 — [61300311021](https://www.flux.ai/adrian95/61300311021~b2y.md)
- Package or Case Code: HDRRA3W79P0X254_1X3_762X254X269P
- Manufacturer Name: Wurth Elektronik
- Part Type: Connector
- Manufacturer Part Number: 61300311021
- License: https://creativecommons.org/licenses/by/4.0/
- Role: Flame sensor module header
- Datasheet URL: https://www.we-online.com/components/products/datasheet/61300311021.pdf
**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
### J4 — [TSW-106-07-G-S](https://www.flux.ai/adrian95/tsw-106-07-g-s~giw.md)
- Connector Gender: Male
- Manufacturer Name: Samtec
- Connector Pitch: 2.54mm
- License: https://creativecommons.org/licenses/by/4.0/
- Connector Rows: 1
- Connector Type: Headers and Wire Housings
- Role: Connector
- Connector Positions: 6
- Role Details: Programming header: 3V3, GND, TX0, RX0, EN, BOOT note
- Datasheet URL: https://suddendocs.samtec.com/catalog_english/tsw_th.pdf
- Part Type: Connector
- Manufacturer Part Number: TSW-106-07-G-S
**Pins:**
- 01 [pin 01]
- 02 [pin 02]
- 03 [pin 03]
- 04 [pin 04]
- 05 [pin 05]
- 06 [pin 06]
### J5 — [Phoenix Contact 1757242](https://www.flux.ai/adrian95/phoenix-contact-1757242~wl2.md)
- Part Type: Connector
- Datasheet URL: https://www.phoenixcontact.com/product/pdf/api/v1/MTc1NzI0Mg?_realm=us&_locale=en-US&blocks=commercial-data%2Ctechnical-data%2Cdrawings%2Capprovals%2Cclassifications%2Cenvironmental-compliance-data%2Call-accessories
- Role: Connector
- Role Details: External screw terminal
- Manufacturer Part Number: 1757242
- Manufacturer Name: Phoenix Contact
- License: https://creativecommons.org/licenses/by/4.0/
**Pins:**
- Pin_1 [pin 1]
- Pin_2 [pin 2]
### J6 — [Phoenix Contact 1757242](https://www.flux.ai/adrian95/phoenix-contact-1757242~wl2.md)
- Manufacturer Part Number: 1757242
- Datasheet URL: https://www.phoenixcontact.com/product/pdf/api/v1/MTc1NzI0Mg?_realm=us&_locale=en-US&blocks=commercial-data%2Ctechnical-data%2Cdrawings%2Capprovals%2Cclassifications%2Cenvironmental-compliance-data%2Call-accessories
- Part Type: Connector
- Role Details: External screw terminal
- Manufacturer Name: Phoenix Contact
- License: https://creativecommons.org/licenses/by/4.0/
- Role: Connector
**Pins:**
- Pin_1 [pin 1]
- Pin_2 [pin 2]
### J7 — [Phoenix Contact 1757242](https://www.flux.ai/adrian95/phoenix-contact-1757242~wl2.md)
- Role: Connector
- License: https://creativecommons.org/licenses/by/4.0/
- Manufacturer Name: Phoenix Contact
- Role Details: External screw terminal
- Manufacturer Part Number: 1757242
- Datasheet URL: https://www.phoenixcontact.com/product/pdf/api/v1/MTc1NzI0Mg?_realm=us&_locale=en-US&blocks=commercial-data%2Ctechnical-data%2Cdrawings%2Capprovals%2Cclassifications%2Cenvironmental-compliance-data%2Call-accessories
- Part Type: Connector
**Pins:**
- Pin_1 [pin 1]
- Pin_2 [pin 2]
### J8 — [TSW-106-07-G-S](https://www.flux.ai/adrian95/tsw-106-07-g-s~giw.md)
- Manufacturer Part Number: TSW-106-07-G-S
- Part Type: Connector
- Role: Connector
- Datasheet URL: https://suddendocs.samtec.com/catalog_english/tsw_th.pdf
- Connector Positions: 6
- Role Details: Expansion or display header
- Connector Type: Headers and Wire Housings
- Connector Rows: 1
- License: https://creativecommons.org/licenses/by/4.0/
- Connector Pitch: 2.54mm
- Manufacturer Name: Samtec
- Connector Gender: Male
**Pins:**
- 01 [pin 01]
- 02 [pin 02]
- 03 [pin 03]
- 04 [pin 04]
- 05 [pin 05]
- 06 [pin 06]
### J9 — [TSW-106-07-G-S](https://www.flux.ai/adrian95/tsw-106-07-g-s~giw.md)
- Manufacturer Name: Samtec
- Connector Pitch: 2.54mm
- Connector Rows: 1
- License: https://creativecommons.org/licenses/by/4.0/
- Connector Gender: Male
- Datasheet URL: https://suddendocs.samtec.com/catalog_english/tsw_th.pdf
- Part Type: Connector
- Manufacturer Part Number: TSW-106-07-G-S
- Role: Connector
- Connector Type: Headers and Wire Housings
- Role Details: Expansion or display header
- Connector Positions: 6
**Pins:**
- 01 [pin 01]
- 02 [pin 02]
- 03 [pin 03]
- 04 [pin 04]
- 05 [pin 05]
- 06 [pin 06]
### K1 — [KY-019](https://www.flux.ai/vasyl/ky-019~t4.md)
- Manufacturer Name: Keyes SR1
- Datasheet URL: https://datasheet.lcsc.com/lcsc/1811021933_Ningbo-Songle-Relay-SRD-05VDC-SL-C_C35449.pdf
- Role: 5V relay module output
- Manufacturer Part Number: KY-019
- Part Type: Relay Module
**Pins:**
- COM [pin COM]
- GND [pin A2]
- NC [pin NC]
- NO [pin NO]
- Signal
- VCC [pin A1]
### K2 — [KY-019](https://www.flux.ai/vasyl/ky-019~t4.md)
- Role: 5V relay module output
- Manufacturer Part Number: KY-019
- Part Type: Relay Module
- Datasheet URL: https://datasheet.lcsc.com/lcsc/1811021933_Ningbo-Songle-Relay-SRD-05VDC-SL-C_C35449.pdf
- Manufacturer Name: Keyes SR1
**Pins:**
- COM [pin COM]
- GND [pin A2]
- NC [pin NC]
- NO [pin NO]
- Signal
- VCC [pin A1]
### LED4 — [SML-D13FWT86C](https://www.flux.ai/cherepanyadima/sml-d13fwt86c.md)
- Role: Indicator
- Part Type: Optoelectronic Devices
- Role Details: Status LED channel
- Manufacturer Part Number: SML-D13FWT86C
- Datasheet URL: https://www.snapeda.com/parts/SML-D13FWT86C/Rohm%20Semiconductor/datasheet/
- Manufacturer Name: Rohm Semiconductor
**Pins:**
- 1 [pin 1]
- 2 [pin 2]
### MH1 — [M3 Mounting Hole](https://www.flux.ai/vasyl/m3-mounting-hole~kc3.md)
- Role: Mechanical
- Product Info Url: https://www.mcmaster.com/screws/drive-style~torx/rounded-head-style~pan/material~steel/specifications-met~iso-7045/thread-size~m3/finish~zinc-plated/
**Pins:**
- terminal
### SW1 — [TS-1002-10026](https://www.flux.ai/jharwinbarrozo/ts-1002-10026~q6p.md)
- Role: Switching
- Manufacturer Part Number: TS-1002-10026
- Part Type: Switch
- Datasheet URL: https://datasheet.lcsc.com/lcsc/2304140030_XUNPU-TS-1002-10026_C455101.pdf
- Manufacturer Name: XUNPU
**Pins:**
- 4 [pin 4]
- 3 [pin 3]
- 1 [pin 1]
- 2 [pin 2]
### SW2 — [TS-1002-10026](https://www.flux.ai/jharwinbarrozo/ts-1002-10026~q6p.md)
- Datasheet URL: https://datasheet.lcsc.com/lcsc/2304140030_XUNPU-TS-1002-10026_C455101.pdf
- Manufacturer Name: XUNPU
- Manufacturer Part Number: TS-1002-10026
- Part Type: Switch
- Role: Switching
**Pins:**
- 4 [pin 4]
- 3 [pin 3]
- 1 [pin 1]
- 2 [pin 2]
### TP1 — [5002](https://www.flux.ai/cherepanyadima/5002~l4.md)
- Role: Connector
- Manufacturer Part Number: 5002
- Datasheet URL: https://www.keyelco.com/userAssets/file/K75p62.pdf
- Manufacturer Name: Keystone
- Role Details: Power rail test point
- Part Type: Connector
**Pins:**
- ~ [pin TP]
### TP2 — [5002](https://www.flux.ai/cherepanyadima/5002~l4.md)
- Part Type: Connector
- Role Details: Power rail test point
- Manufacturer Name: Keystone
- Datasheet URL: https://www.keyelco.com/userAssets/file/K75p62.pdf
- Role: Connector
- Manufacturer Part Number: 5002
**Pins:**
- ~ [pin TP]
### TP3 — [5002](https://www.flux.ai/cherepanyadima/5002~l4.md)
- Part Type: Connector
- Role: Connector
- Manufacturer Part Number: 5002
- Manufacturer Name: Keystone
- Datasheet URL: https://www.keyelco.com/userAssets/file/K75p62.pdf
- Role Details: Power rail test point
**Pins:**
- ~ [pin TP]
### TP4 — [5002](https://www.flux.ai/cherepanyadima/5002~l4.md)
- Part Type: Connector
- Manufacturer Part Number: 5002
- Role Details: Power rail test point
- Datasheet URL: https://www.keyelco.com/userAssets/file/K75p62.pdf
- Manufacturer Name: Keystone
- Role: Connector
**Pins:**
- ~ [pin TP]
### U10 — [M3 Mounting Hole](https://www.flux.ai/vasyl/m3-mounting-hole~kc3.md)
- Role: Mechanical
- Product Info Url: https://www.mcmaster.com/screws/drive-style~torx/rounded-head-style~pan/material~steel/specifications-met~iso-7045/thread-size~m3/finish~zinc-plated/
**Pins:**
- terminal
### U11 — [M3 Mounting Hole](https://www.flux.ai/vasyl/m3-mounting-hole~kc3.md)
- Role: Mechanical
- Product Info Url: https://www.mcmaster.com/screws/drive-style~torx/rounded-head-style~pan/material~steel/specifications-met~iso-7045/thread-size~m3/finish~zinc-plated/
**Pins:**
- terminal
### U12 — [ESP32-S3-WROOM-1-N16R8](https://www.flux.ai/lcsc/esp32-s3-wroom-1-n16r8~s9kh.md)
- Frequency: 2.4GHz
- License: https://creativecommons.org/licenses/by/4.0/
- Package or Case Code: WIRELM-SMD_ESP32-S3-WROOM-1
- Operating Temperature: -40°C ~ 65°C (TA)
- Symbol Style: parametric-v1
- LCSC Part Number: C2913202
- Current - Transmitting: 285mA ~ 355mA
- Part Type: RF Transceiver
- Current - Receiving: 95mA ~ 97mA
- Role Details: Production ESP32-S3-WROOM-1-N16R8 module replacing ESP32 DevKit V1; 3.3V logic, WiFi, OTA, safety state machine
- Role: Main controller
- Manufacturer Part Number: ESP32-S3-WROOM-1-N16R8
- Datasheet URL: https://www.lcsc.com/datasheet/C2913202.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1VXVlNfRlBfUzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D
- JLCPCB Part Class: Extended Part
- Supply Voltage: 3V ~ 3.6V
- Manufacturer Name: ESPRESSIF(乐鑫)
**Pins:**
- 3V3 [pin 2]
- EN [pin 3]
- GND [pin 47]
- GND [pin 41]
- GND [pin 45]
- GND [pin 40]
- GND [pin 48]
- GND [pin 49]
- GND [pin 44]
- GND [pin 46]
- GND [pin 42]
- GND [pin 1]
- GND [pin 43]
- IO0 [pin 27]
- IO1 [pin 39]
- IO10 [pin 18]
- IO11 [pin 19]
- IO12 [pin 20]
- IO13 [pin 21]
- IO14 [pin 22]
- IO15 [pin 8]
- IO16 [pin 9]
- IO17 [pin 10]
- IO18 [pin 11]
- IO19 [pin 13]
- IO2 [pin 38]
- IO20 [pin 14]
- IO21 [pin 23]
- IO3 [pin 15]
- IO35 [pin 28]
- IO36 [pin 29]
- IO37 [pin 30]
- IO38 [pin 31]
- IO39 [pin 32]
- IO4 [pin 4]
- IO40 [pin 33]
- IO41 [pin 34]
- IO42 [pin 35]
- IO45 [pin 26]
- IO46 [pin 16]
- IO47 [pin 24]
- IO48 [pin 25]
- IO5 [pin 5]
- IO6 [pin 6]
- IO7 [pin 7]
- IO8 [pin 12]
- IO9 [pin 17]
- RXD0 [pin 36]
- TXD0 [pin 37]
### U13 — [DHT22](https://www.flux.ai/vasy_skral/dht22~ju8.md)
- Role: Temperature/humidity sensor
- Package or Case Code: Module
- Role Details: DHT22 ambient sensor on 3.3V single-wire GPIO with 4.7k pull-up
- License: https://creativecommons.org/licenses/by/4.0/
- Datasheet URL: https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf
- Manufacturer Name: Asair
- Manufacturer Part Number: DHT22
- Part Type: Sensor
- Symbol Style: Parametric
**Pins:**
- DATA [pin 2]
- GND [pin 4]
- NULL [pin 3]
- VDD [pin 1]
### U2 — [LM2596 DC-DC buck converter](https://www.flux.ai/vasy_skral/lm2596-dc-dc-buck-converter~2q1.md)
- Role: 12V to 5V buck converter
- Max Output Voltage: 5V
- Part Type: Integrated Circuit
- License: https://creativecommons.org/licenses/by/4.0/
**Pins:**
- IN - [pin 2]
- IN + [pin 1]
- OUT - [pin 3]
- OUT + [pin 4]
### U4 — [DS18B20+](https://www.flux.ai/adrian95/ds18b20plus~f15.md)
- License: https://creativecommons.org/licenses/by/4.0/
- Part Type: Sensor
- Manufacturer Part Number: DS18B20+
- Role: Waterproof DS18B20 temperature probe equivalent
- Manufacturer Name: Analog Devices Inc./Maxim Integrated
- Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/ds18b20.pdf
**Pins:**
- DQ [pin 2]
- GND [pin 1]
- VDD [pin 3]
### U5 — [MLX90640ESF-BAB-000-TU](https://www.flux.ai/adrian95/mlx90640esf-bab-000-tu.md)
- Manufacturer Name: Melexis
- Role Details: MLX90640 thermal imaging sensor on 3.3V I2C bus; production footprint replacing sublayout module
- Part Type: Sensors
- Manufacturer Part Number: MLX90640ESF-BAB-000-TU
- Datasheet URL: https://www.lcsc.com/datasheet/C488251.pdf?spm=wm.sxq.inf.ggs&utm_source=octopart&lcsc_vid=QlUIU1dSRgJcA1FQQVUMBgdeElQIVldRQ1daVQdeQAcxVlNeR1dYXlJRRVRYVDsOAxUeFF5JWA4NEwsWFhMaSQcJGk4%3D
- Role: Sensing (Shunt)
**Pins:**
- GND [pin 3]
- SCL [pin 4]
- SDA [pin 1]
- VDD [pin 2]
### U7 — [ESP32-CAM](https://www.flux.ai/lcsc/esp32-cam~krvb.md)
- Datasheet URL: https://www.lcsc.com/datasheet/C277946.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1VbVFRURFhdUjsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D
- Symbol Style: parametric-v1
- Manufacturer Name: Ai-Thinker(安信可)
- Part Type: WiFi Modules
- LCSC Part Number: C277946
- Package or Case Code: COMM-TH_16P-L40.0-W27.0-P2.54_ESP32-CAM
- Role: Camera module
- License: https://creativecommons.org/licenses/by/4.0/
- Manufacturer Part Number: ESP32-CAM
- JLCPCB Part Class: Extended Part
**Pins:**
- 3V3 [pin 9]
- 5V [pin 8]
- GND [pin 16]
- GND [pin 7]
- GND [pin 12]
- IO0 [pin 11]
- IO12 [pin 6]
- IO13 [pin 5]
- IO14 [pin 3]
- IO15 [pin 4]
- IO16 [pin 10]
- IO2 [pin 2]
- IO4 [pin 1]
- U0R [pin 14]
- U0T [pin 15]
- VCC [pin 13]
### U8 — [AP2112K-3.3TRG1](https://www.flux.ai/adrian95/ap2112k-33trg1~zlq.md)
- Datasheet URL: https://www.diodes.com/assets/Datasheets/AP2112.pdf
- License: https://creativecommons.org/licenses/by/4.0/
- Manufacturer Name: Diodes Incorporated
- Symbol Style: parametric-v1
- Role: Power Conversion
- Role Details: Low-noise 5V to 3.3V LDO regulator
- Part Type: Integrated Circuit
- Manufacturer Part Number: AP2112K-3.3TRG1
**Pins:**
- EN [pin 3]
- GND [pin 2]
- NC [pin 4]
- VIN [pin 1]
- VOUT [pin 5]
### U9 — [M3 Mounting Hole](https://www.flux.ai/vasyl/m3-mounting-hole~kc3.md)
- Role: Mechanical
- Product Info Url: https://www.mcmaster.com/screws/drive-style~torx/rounded-head-style~pan/material~steel/specifications-met~iso-7045/thread-size~m3/finish~zinc-plated/
**Pins:**
- terminal
### USB1 — [USB4215-03-A](https://www.flux.ai/adrian95/usb4215-03-a~kg3.md)
- License: https://creativecommons.org/licenses/by/4.0/
- Part Type: USB C
- Package or Case Code: GCT_USB4215-03-A_REVA
- Role Details: USB-C power/programming connector at board edge
- Symbol Style: parametric-v1
- Datasheet URL: https://gct.co/files/specs/usb4215-spec.pdf
- Manufacturer Part Number: USB4215-03-A
- Role: Connector
- Manufacturer Name: GCT
**Pins:**
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND_A [pin A1_B12]
- GND_B [pin B1_A12]
- SBU1 [pin A8]
- SBU2 [pin B8]
- SHIELD [pin SH1]
- SHIELD [pin SH4]
- SHIELD [pin SH2]
- SHIELD [pin SH3]
- VBUS_A [pin A4_B9]
- VBUS_B [pin B4_A9]
*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/mateti/esp32-safety-sensor-hub~v0](https://www.flux.ai/mateti/esp32-safety-sensor-hub~v0).*
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*Generated from [https://www.flux.ai/mateti/esp32-safety-sensor-hub~v0](https://www.flux.ai/mateti/esp32-safety-sensor-hub~v0)*