# 24V ESP32\-C6 Matter Environmental Presence Sensor

## Description

24 V DC powered ESP32\-C6 Matter/Thread WiFi/BLE environmental presence sensor with USB\-C programming, mmWave/PIR motion sensing, temperature, humidity, light and air\-quality sensing, plus optional Li\-ion battery and solar charging power path\.

## Project Details

- **Owner:** uli1970
- **Created:** 5/17/2026
- **Last Updated:** 5/17/2026
- **Visibility:** Public
- **Domain:** IoT environmental presence sensor
- **Power Requirements:** 24 V DC input buck to 5 V/3\.3 V, protected USB\-C programming path, optional solar/battery power path with load sharing
- **Implementation Details:** Functional blocks: 24 V input protection and buck conversion, ESP32\-C6 module, I2C environmental/light/air\-quality sensors, mmWave presence sensor, PIR motion input, USB\-C native programming, optional Li\-ion battery charger/solar input
- **Connectivity:** WiFi, Bluetooth LE, Thread / Matter via ESP32\-C6
- **Human Interface:** USB\-C programming, reset/boot buttons, status LED
- **Operating Voltage:** 24 V DC primary input; USB\-C 5 V programming; optional single\-cell Li\-ion/LiPo battery with solar charging inputV

## Key Components

### D1 — [SMBJ33CA\-13\-F](https://flux.ai/lcsc/smbj33ca-13-f~jb2j.md)

- JLCPCB Part Class: Extended Part
- Manufacturer Name: DIODES\(美台\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_Diodes\-Incorporated\-SMBJ33CA\-13\-F\_C135068\.pdf
- Package or Case Code: SMB\_L4\.6\-W3\.6\-LS5\.3\-BI
- Manufacturer Part Number: SMBJ33CA\-13\-F
- Product Info Url: https://lcsc\.com/product\-detail/TVS\_DIODES\_SMBJ33CA\-13\-F\_SMBJ33CA\-13\-F\_C135068\.html
- LCSC Part Number: C135068
- Part Type: TVS

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### D2 — [SS34](https://flux.ai/lcsc/ss34~6q67.md)

- Manufacturer Name: UMW\(友台半导体\)
- Reverse Voltage: 40V
- Diode Type: Schottky
- LCSC Part Number: C2758511
- Part Type: Schottky Barrier Diodes \(SBD\)
- Datasheet URL: https://www\.lcsc\.com/datasheet/C2758511\.pdf
- Forward Voltage: 0\.3V to 0\.45V
- Package or Case Code: SMB\_L4\.3\-W3\.6\-LS5\.4\-RD
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: SS34

**Pins:**
- A [pin 2]
- K [pin 1]

### D3 — [SS34](https://flux.ai/lcsc/ss34~6q67.md)

- Manufacturer Name: UMW\(友台半导体\)
- Reverse Voltage: 40V
- Diode Type: Schottky
- LCSC Part Number: C2758511
- Part Type: Schottky Barrier Diodes \(SBD\)
- Datasheet URL: https://www\.lcsc\.com/datasheet/C2758511\.pdf
- Forward Voltage: 0\.3V to 0\.45V
- Package or Case Code: SMB\_L4\.3\-W3\.6\-LS5\.4\-RD
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: SS34

**Pins:**
- A [pin 2]
- K [pin 1]

### F1 — [SMD050F\-2](https://flux.ai/adrian95/smd050f-2.md)

- Datasheet URL: https://www\.littelfuse\.com/assetdocs/littelfuse\-ptc\-smd\-datasheet?assetguid=e664881a\-0c68\-4836\-928b\-7ed2f0c2a6da
- Part Type: Circuit Protection Devices
- Manufacturer Part Number: SMD050F\-2
- Mount: Surface Mount
- Manufacturer Name: Littelfuse
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- \~ [pin 2]
- \~ [pin 1]

### J1 — [USB\-C 2\.0 Receptacle](https://flux.ai/vasy_skral/usb-c-2p0-receptacle~1xw.md)

- Symbol Style: parametric\-v1
- Manufacturer Name: GTC
- Connector Gender: Receptacle
- Connector Type: USB\-C
- Part Type: USB C
- Role: USB\-C Power/Data Input
- Manufacturer Part Number: USB4105\-GF\-A
- Purchase Url: https://www\.digikey\.com/en/products/detail/gct/USB4105\-GF\-A/11198441
- Datasheet URL: https://gct\.co/files/drawings/usb4105\.pdf

**Pins:**
- CC1 [pin 6]
- CC2 [pin 12]
- D\- [pin 7]
- D\- [pin 9]
- D\+ [pin 10]
- D\+ [pin 8]
- GND [pin 1]
- GND [pin 16]
- GND [pin 15]
- GND [pin 2]
- SBU1 [pin 11]
- SBU2 [pin 5]
- VBUS [pin 3]
- VBUS [pin 14]
- VBUS [pin 4]
- VBUS [pin 13]

### J2 — [DG250\-3\.5\-02P\-11\-00A\(H\)](https://flux.ai/adrian95/dg250-3p5-02p-11-00ah~77l.md)

- Part Type: Connector
- Manufacturer Part Number: DG250\-3\.5\-02P\-11\-00A\(H\)
- Datasheet URL: https://www\.tme\.com/Document/74a50bb60bd70b3c953bc54e89073085/DG250\-3\.5\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Name: Degson

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J3 — [S2B\-PH\-K\-S\(LF\)\(SN\)](https://flux.ai/lcsc/s2b-ph-k-slfsn~vk6f.md)

- Package or Case Code: CONN\-TH\_S2B\-PH\-K\-S\-LF\-SN
- Manufacturer Part Number: S2B\-PH\-K\-S\(LF\)\(SN\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_JST\-S2B\-PH\-K\-S\-LF\-SN\_C173752\.pdf
- Part Type: Wire To Board / Wire To Wire Connector
- Manufacturer Name: JST
- Product Info Url: https://lcsc\.com/product\-detail/PH\-Connectors\_JST\-Sales\-America\_S2B\-PH\-K\-S\-LF\-SN\_JST\-Sales\-America\-S2B\-PH\-K\-S\-LF\-SN\_C173752\.html
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C173752

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J4 — [S2B\-PH\-K\-S\(LF\)\(SN\)](https://flux.ai/lcsc/s2b-ph-k-slfsn~vk6f.md)

- Package or Case Code: CONN\-TH\_S2B\-PH\-K\-S\-LF\-SN
- Manufacturer Part Number: S2B\-PH\-K\-S\(LF\)\(SN\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_JST\-S2B\-PH\-K\-S\-LF\-SN\_C173752\.pdf
- Part Type: Wire To Board / Wire To Wire Connector
- Manufacturer Name: JST
- Product Info Url: https://lcsc\.com/product\-detail/PH\-Connectors\_JST\-Sales\-America\_S2B\-PH\-K\-S\-LF\-SN\_JST\-Sales\-America\-S2B\-PH\-K\-S\-LF\-SN\_C173752\.html
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C173752

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J5 — [Pin Header 01x03 2\.54mm Vertical](https://flux.ai/adrian95/pin-header-01x03-254mm-vertical~cp4.md)

- Part Type: Connector
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- Pin\_1 [pin 1]
- Pin\_2 [pin 2]
- Pin\_3 [pin 3]

### LED1 — [0603GBD0790S01](https://flux.ai/adrian95/0603gbd0790s01~iak.md)

- Role: Status Indicator
- Part Type: LED
- Datasheet URL: https://mm\.digikey\.com/Volume0/opasdata/d220001/medias/docus/4336/0603GBD0790S01\.pdf
- Manufacturer Part Number: 0603GBD0790S01
- Manufacturer Name: ORIENTAL TECHNOLOGY
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- A [pin 2]
- K [pin 1]

### SW1 — [TS\-1088\-AR02016](https://flux.ai/lcsc/ts-1088-ar02016~e3n1.md)

- Manufacturer Name: XUNPU\(讯普\)
- Role: Reset Button
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2409302330\_XUNPU\-TS\-1088\-AR02016\_C720477\.pdf
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: TS\-1088\-AR02016
- Product Info Url: https://lcsc\.com/product\-detail/Tactile\-Switches\_XUNPU\-TS\-1088\-AR02016\_C720477\.html
- LCSC Part Number: C720477
- Part Type: Tactile Switches
- Package or Case Code: SW\-SMD\_L3\.9\-W3\.0\-P4\.45

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW2 — [TS\-1088\-AR02016](https://flux.ai/lcsc/ts-1088-ar02016~e3n1.md)

- Manufacturer Name: XUNPU\(讯普\)
- Role: Boot Button
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2409302330\_XUNPU\-TS\-1088\-AR02016\_C720477\.pdf
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: TS\-1088\-AR02016
- Product Info Url: https://lcsc\.com/product\-detail/Tactile\-Switches\_XUNPU\-TS\-1088\-AR02016\_C720477\.html
- LCSC Part Number: C720477
- Part Type: Tactile Switches
- Package or Case Code: SW\-SMD\_L3\.9\-W3\.0\-P4\.45

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### U1 — [TPS259474LRPWR](https://flux.ai/lcsc/tps259474lrpwr~74ql.md)

- Role Details: TPS259474 circuit\-breaker eFuse; ILIM set to approximately 3A with 1\.1kΩ; UVLO/OVLO divider targets \~4\.4V UVLO and \~5\.8V OVLO\.
- Manufacturer Part Number: TPS259474LRPWR
- Package or Case Code: VQFN\-10\_L2\.0\-W2\.0\-P0\.45\-TL
- JLCPCB Part Class: Extended Part
- Manufacturer Name: Texas Instruments
- Role: USB Power Protection
- LCSC Part Number: C2864845
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/tps25947\.pdf

**Pins:**
- DVDT [pin 7]
- EN/UVLO [pin 1]
- GND [pin 8]
- ILM [pin 9]
- IN [pin 5]
- ITIMER [pin 10]
- OUT [pin 6]
- OVLO/OVCSEL [pin 2]
- PG/AUXOFF [pin 3]
- PGTH/\~\{FLT\} [pin 4]

### U10 — [MCP73871\-2AAI/ML](https://flux.ai/adrian95/mcp73871-2aaiml~ff3.md)

- Manufacturer Name: Microchip Technology
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: MCP73871\-2AAI/ML
- Part Type: Integrated Circuit
- Datasheet URL: https://ww1\.microchip\.com/downloads/en/DeviceDoc/MCP73871\-Data\-Sheet\-20002090E\.pdf

**Pins:**
- \~PG [pin 6]
- \~TE [pin 9]
- CE [pin 17]
- EP [pin 21]
- IN\_1 [pin 18]
- IN\_2 [pin 19]
- OUT\_1 [pin 1]
- OUT\_2 [pin 20]
- PROG1 [pin 13]
- PROG2 [pin 4]
- PROG3 [pin 12]
- SEL [pin 3]
- STAT1/\~LBO [pin 8]
- STAT2 [pin 7]
- THERM [pin 5]
- VBAT\_1 [pin 14]
- VBAT\_2 [pin 15]
- VBAT\_SENSE [pin 16]
- VPCC [pin 2]
- VSS\_1 [pin 10]
- VSS\_2 [pin 11]

### U2 — [TPS62840DLCR](https://flux.ai/adrian95/tps62840dlcr~zza.md)

- Manufacturer Name: Texas Instruments
- Package or Case Code: SON50P150X200X100\-8N\-D
- Manufacturer Part Number: TPS62840DLCR
- Datasheet URL: https://www\.ti\.com/general/docs/suppproductinfo\.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww\.ti\.com%2Flit%2Fgpn%2Ftps62840
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Integrated Circuit
- Role Details: TPS62840 750mA buck; 4\.7uF input, 2\.2uH inductor, 10uF output, RSET=267kΩ selects 3\.3V\.
- Role: 3\.3V Buck Regulator

**Pins:**
- EN [pin 4]
- GND [pin 1]
- MODE [pin 3]
- STOP [pin 6]
- SW [pin 7]
- VIN [pin 2]
- VOS [pin 8]
- VSET [pin 5]

### U3 — [ESP32\-C6\-WROOM\-1\-N8](https://flux.ai/adrian95/esp32-c6-wroom-1-n8~1iw.md)

- Package or Case Code: ESP32C6WROOM1N8
- Symbol Style: parametric\-v1
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: ESP32\-C6\-WROOM\-1\-N8 with PCB antenna; powered at 3\.3V; native USB on IO12/IO13; I2C to SHT40 on IO6/IO7\.
- Manufacturer Part Number: ESP32\-C6\-WROOM\-1\-N8
- Manufacturer Name: Espressif Systems
- Role: WiFi/BLE MCU Module
- Part Type: RF Transceiver
- Datasheet URL: https://www\.espressif\.com/sites/default/files/documentation/esp32\-c6\-wroom\-1\_wroom\-1u\_datasheet\_en\.pdf

**Pins:**
- 3V3 [pin 2]
- EN [pin 3]
- GND\_1 [pin 1]
- GND\_10 [pin 36]
- GND\_11 [pin 37]
- GND\_2 [pin 28]
- GND\_3 [pin 29]
- GND\_4 [pin 30]
- GND\_5 [pin 31]
- GND\_6 [pin 32]
- GND\_7 [pin 33]
- GND\_8 [pin 34]
- GND\_9 [pin 35]
- IO0 [pin 8]
- IO1 [pin 9]
- IO10 [pin 11]
- IO11 [pin 12]
- IO12 [pin 13]
- IO13 [pin 14]
- IO15 [pin 23]
- IO18 [pin 16]
- IO19 [pin 17]
- IO2 [pin 27]
- IO20 [pin 18]
- IO21 [pin 19]
- IO22 [pin 20]
- IO23 [pin 21]
- IO3 [pin 26]
- IO4 [pin 4]
- IO5 [pin 5]
- IO6 [pin 6]
- IO7 [pin 7]
- IO8 [pin 10]
- IO9 [pin 15]
- NC [pin 22]
- RXD0 [pin 24]
- TXD0 [pin 25]

### U4 — [SHT40\-AD1F\-R2](https://flux.ai/adrian95/sht40-ad1f-r2~wjk.md)

- Role: Temperature/Humidity Sensor
- Manufacturer Part Number: SHT40\-AD1F\-R2
- Datasheet URL: https://sensirion\.com/media/documents/33FD6951/63E1087C/Datasheet\_SHT4x\_1\.pdf
- Part Type: Sensor
- Manufacturer Name: Sensirion AG
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: SHT40 I2C address 0x44; requires 100nF VDD decoupling and bus pull\-ups to 3\.3V\.

**Pins:**
- SCL [pin 2]
- SDA [pin 1]
- VDD [pin 3]
- VSS [pin 4]

### U5 — [USBLC6\-2P6](https://flux.ai/kicad-part-library/usblc6-2p6~djt.md)

- Role Details: Protects USB D\+ and D\- near the USB\-C receptacle\.
- Role: USB Data ESD Protection
- Manufacturer Name: Texas Instruments Inc\.
- Part Type: Protection
- Manufacturer Part Number: USBLC6\-2P6
- Datasheet URL: https://www\.st\.com/resource/en/datasheet/usblc6\-2\.pdf
- Package or Case Code: SOT\-666

**Pins:**
- GND [pin 2]
- I/O1 [pin 1]
- I/O1 [pin 6]
- I/O2 [pin 3]
- I/O2 [pin 4]
- VBUS [pin 5]

### U6 — [LM5164DDAR](https://flux.ai/lcsc/lm5164ddar~6h70.md)

- Max Output Voltage: 1\.2V\~100V
- Output Current: 1A
- Operating Temperature: \-40℃\~\+150℃@\(TJ\)
- Package or Case Code: SO\-8\_L4\.9\-W3\.9\-P1\.27\-LS6\.0\-BL\-EP
- Part Type: DC\-DC Converters
- Manufacturer Name: TI\(德州仪器\)
- Product Info Url: https://lcsc\.com/product\-detail/DC\-DC\-Converters\_Texas\-Instruments\-Texas\-Instruments\-LM5164DDAR\_C477928\.html
- LCSC Part Number: C477928
- Frequency: 1MHz
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2002241531\_Texas\-Instruments\-LM5164DDAR\_C477928\.pdf
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: LM5164DDAR
- Max Input Voltage: 6V\~100V
- Logic Function: Step\-down

**Pins:**
- BST [pin 7]
- EN/UVLO [pin 3]
- EP [pin 9]
- FB [pin 5]
- GND [pin 1]
- PGOOD [pin 6]
- RON [pin 4]
- SW [pin 8]
- VIN [pin 2]

### U7 — [VEML7700\-TR](https://flux.ai/adrian95/veml7700-tr~u3b.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Package or Case Code: VEML7700
- Datasheet URL: https://mm\.digikey\.com/Volume0/opasdata/d220001/medias/docus/21/VEML7700\.pdf
- Part Type: Sensor
- Manufacturer Name: Vishay
- Manufacturer Part Number: VEML7700\-TR

**Pins:**
- GND [pin 3]
- SCL [pin 1]
- SDA [pin 4]
- VDD [pin 2]

### U8 — [SGP40\-D\-R4](https://flux.ai/jecstronic/sgp40-d-r4~3qp.md)

- Datasheet URL: https://sensirion\.com/media/documents/296373BB/6203C5DF/Sensirion\_Gas\_Sensors\_Datasheet\_SGP40\.pdf
- Manufacturer Part Number: SGP40\-D\-R4
- Part Type: Sensor
- Manufacturer Name: Sensirion AG

**Pins:**
- GND
- NA
- SCL
- SDA
- VDD
- VDDH
- VSS

### U9 — [HLK\-LD2410C\-P](https://flux.ai/adrian95/hlk-ld2410c-p~a12.md)

- Datasheet URL: https://www\.lcsc\.com/datasheet/C19723500\.pdf
- LCSC Part Number: C19723500
- Manufacturer Name: HI\-LINK
- Manufacturer Part Number: HLK\-LD2410C\-P
- Part Type: Module
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- GND [pin 4]
- OUT [pin 3]
- RXD [pin 2]
- TXD [pin 1]
- VCC [pin 5]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/uli1970/24v\-esp32\-c6\-matter\-environmental\-presence\-sensor\~3p](https://flux.ai/uli1970/24v-esp32-c6-matter-environmental-presence-sensor~3p).*

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*Generated from [https://flux\.ai/uli1970/24v\-esp32\-c6\-matter\-environmental\-presence\-sensor\~3p](https://flux.ai/uli1970/24v-esp32-c6-matter-environmental-presence-sensor~3p)*