# USB-C WiFi BLE TH Sensor ## Description Consumer USB-C powered environmental sensor node with Wi-Fi, BLE 5.x, digital temperature/humidity sensing, protected 5 V input, and a 3.3 V low-power MCU/sensor rail. ## Project Details - **Owner:** khoado - **Created:** 7/18/2026 - **Last Updated:** 7/18/2026 - **Visibility:** Public - **Connectivity:** WiFi - **Power Requirements:** USB-C - **Domain:** Consumer IoT - **Operating Voltage:** 5V - **Connectivity:** Bluetooth ## Key Components ### D1 — [USBLC6-2SC6](https://www.flux.ai/lcsc/usblc6-2sc6~2e9x.md) - Maximum Clamping Voltage: 17V - Role Details: USB 2.0 data-line ESD array near USB-C connector - Peak Pulse Current: 5A - Power: 150W - Part Type: ESD Protection Devices - Operating Temperature: -55°C ~ 125°C (TJ) - LCSC Part Number: C2687116 - Symbol Style: parametric-v1 - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL - JLCPCB Part Class: Extended Part - Manufacturer Part Number: USBLC6-2SC6 - Breakdown Voltage: 6V - Manufacturer Name: UMW(友台半导体) - Role: ESD Protection - Datasheet URL: https://www.lcsc.com/datasheet/C2687116.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNRTlhdUVdURFlXXzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D **Pins:** - GND [pin 2] - I/O1 [pin 1] - I/O1 [pin 6] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### D2 — [ESD5341N](https://www.flux.ai/lcsc/esd5341n~k8iz.md) - Package or Case Code: DFN1006-2L-RD - Part Type: TVS - Role: ESD Protection - Manufacturer Name: TECH PUBLIC(台舟) - LCSC Part Number: C3021106 - License: https://creativecommons.org/licenses/by/4.0/ - Forward Voltage: 0.7V at 1AV - Manufacturer Part Number: ESD5341N - Diode Type: TVS Diode - JLCPCB Part Class: Extended Part - Role Details: 5 V VBUS TVS/ESD clamp at connector before eFuse - Max Reverse Voltage: 5V - Datasheet URL: https://www.lcsc.com/datasheet/C3021106.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1VbVVxRR1JXUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D **Pins:** - 1 [pin 1] - 2 [pin 2] ### D3 — [ESD5341N](https://www.flux.ai/lcsc/esd5341n~k8iz.md) - Forward Voltage: 0.7V at 1AV - Role: Protection - Role Details: USB-C CC1 5 V ESD clamp near connector - Manufacturer Part Number: ESD5341N - JLCPCB Part Class: Extended Part - Diode Type: TVS Diode - Max Reverse Voltage: 5V - Datasheet URL: https://www.lcsc.com/datasheet/C3021106.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1VbVVxRR1JXUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Package or Case Code: DFN1006-2L-RD - Part Type: TVS - Manufacturer Name: TECH PUBLIC(台舟) - LCSC Part Number: C3021106 - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] ### D4 — [ESD5341N](https://www.flux.ai/lcsc/esd5341n~k8iz.md) - JLCPCB Part Class: Extended Part - Diode Type: TVS Diode - Manufacturer Part Number: ESD5341N - Role Details: USB-C CC2 5 V ESD clamp near connector - Forward Voltage: 0.7V at 1AV - Datasheet URL: https://www.lcsc.com/datasheet/C3021106.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1VbVVxRR1JXUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Max Reverse Voltage: 5V - Package or Case Code: DFN1006-2L-RD - Role: Protection - License: https://creativecommons.org/licenses/by/4.0/ - LCSC Part Number: C3021106 - Manufacturer Name: TECH PUBLIC(台舟) - Part Type: TVS **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [USB4105-GF-A](https://www.flux.ai/adrian95/usb4105-gf-a~im9.md) - Symbol Style: parametric-v1 - Manufacturer Part Number: USB4105-GF-A - Manufacturer Name: GCT - Role Details: 5 V sink-only input, CC1/CC2 Rd resistors, VBUS power path - Datasheet URL: https://gct.co/files/specs/usb4105-spec.pdf - Part Type: USB C - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: GCT - Role: USB-C Connector **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin A1_B12] - GND__1 [pin B1_A12] - SBU1 [pin A8] - SBU2 [pin B8] - SHELL_GND [pin SH1] - SHELL_GND__1 [pin SH2] - SHELL_GND__2 [pin SH3] - SHELL_GND__3 [pin SH4] - VBUS [pin A4_B9] - VBUS__1 [pin B4_A9] ### J2 — [M50-3500542](https://www.flux.ai/adrian95/m50-3500542~4sb.md) - Manufacturer Part Number: M50-3500542 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connectors - Mount: Through Hole - Role Details: SWD/JTAG, UART ISP, reset, 3.3 V reference, and ground access - Manufacturer Name: Harwin - Datasheet URL: https://content.harwin.com/m/d0f746354cedd7a4/original/PD002-Product-Datasheet-ARCHER-M50-and-M52-ranges-BBi.pdf - Role: Debug Header **Pins:** - 1 [pin 1] - 10 [pin 10] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] ### LED1 — [P0603P1N46G12](https://www.flux.ai/rohit297/p0603p1n46g12~4e.md) - Manufacturer Part Number: P0603P1N46G12 - Manufacturer Name: Silverlight - Package or Case Code: D_0603_1608Metric - Role: Status Indicator - Datasheet URL: https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2208181800_Silverlight-P0603P1N46G12_C5123548.pdf - Part Type: LED - Forward Voltage: 2V - Role Details: MCU-controlled low-current status LED **Pins:** - A [pin 2] - K [pin 1] ### SW1 — [FSM1LP](https://www.flux.ai/adrian95/fsm1lp.md) - Role: Reset Switch - Manufacturer Name: TE Connectivity - Role Details: Manual reset by pulling SiWG917 POC_IN low - Part Type: Electromechanical Components - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: FSM1LP **Pins:** - COM_1 [pin 1] - COM_2 [pin 2] - GND [pin 5] - NO_1 [pin 3] - NO_2 [pin 4] ### SW2 — [FSM1LP](https://www.flux.ai/adrian95/fsm1lp.md) - Part Type: Electromechanical Components - Manufacturer Name: TE Connectivity - License: https://creativecommons.org/licenses/by/4.0/ - Role: Boot/ISP Switch - Role Details: Pulls JTAG_TDO_SWO low to request ISP bootloader mode - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6 - Manufacturer Part Number: FSM1LP **Pins:** - COM_1 [pin 1] - COM_2 [pin 2] - GND [pin 5] - NO_1 [pin 3] - NO_2 [pin 4] ### U1 — [SIWG917Y111MGABAR](https://www.flux.ai/adrian95/siwg917y111mgabar.md) - Symbol Style: parametric-v1 - Manufacturer Name: Silicon Labs - License: https://creativecommons.org/licenses/by/4.0/ - Package or Case Code: Module - Role: Wireless MCU module - Role Details: Low-power Wi-Fi/BLE sensor controller; 3.3 V supplies; integrated antenna requires edge keepout - Manufacturer Part Number: SIWG917Y111MGABAR - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/a304d5e8e6e437830e39c060dfff2feb9d6bc31b2834f45b43e373b5288d7fa0.pdf - Part Type: Module **Pins:** - 1V8_LDO [pin 36] - ANT_TUNE_1 [pin 1] - ANT_TUNE_2 [pin 61] - FLASH_IO_VDD [pin 54] - GND_1 [pin 2] - GND_10 [pin 65] - GND_11 [pin 66] - GND_12 [pin 67] - GND_13 [pin 68] - GND_14 [pin 69] - GND_15 [pin 70] - GND_16 [pin 71] - GND_2 [pin 3] - GND_3 [pin 9] - GND_4 [pin 11] - GND_5 [pin 57] - GND_6 [pin 60] - GND_7 [pin 62] - GND_8 [pin 63] - GND_9 [pin 64] - GPIO_10 [pin 55] - GPIO_11 [pin 58] - GPIO_12 [pin 56] - GPIO_15 [pin 59] - GPIO_25 [pin 49] - GPIO_26 [pin 53] - GPIO_27 [pin 46] - GPIO_28 [pin 48] - GPIO_29 [pin 47] - GPIO_30 [pin 45] - GPIO_46 [pin 44] - GPIO_47 [pin 40] - GPIO_48 [pin 39] - GPIO_49 [pin 41] - GPIO_50 [pin 42] - GPIO_51 [pin 43] - GPIO_52 [pin 25] - GPIO_53 [pin 18] - GPIO_54 [pin 19] - GPIO_55 [pin 12] - GPIO_56 [pin 17] - GPIO_57 [pin 21] - GPIO_6 [pin 24] - GPIO_7 [pin 38] - GPIO_8 [pin 20] - GPIO_9 [pin 22] - IOVDD [pin 50] - JTAG_TCK_SWCLK [pin 15] - JTAG_TDI [pin 16] - JTAG_TDO_SWO [pin 14] - JTAG_TMS_SWDIO [pin 13] - POC_IN [pin 31] - POC_OUT [pin 32] - RESET_N [pin 33] - RF [pin 10] - SDIO_IO_VDD [pin 52] - ULP_GPIO_0 [pin 35] - ULP_GPIO_1 [pin 28] - ULP_GPIO_11 [pin 5] - ULP_GPIO_2 [pin 51] - ULP_GPIO_4 [pin 8] - ULP_GPIO_5 [pin 6] - ULP_GPIO_6 [pin 23] - ULP_GPIO_7 [pin 7] - ULP_GPIO_8 [pin 37] - ULP_GPIO_9 [pin 27] - ULP_IO_VDD [pin 26] - UULP_VBAT_GPIO_0 [pin 4] - UULP_VBAT_GPIO_2 [pin 30] - UULP_VBAT_GPIO_3 [pin 29] - VBATT [pin 34] ### U2 — [TPS25940LRVCR](https://www.flux.ai/adrian95/tps25940lrvcr~ojd.md) - Role: Protection - Manufacturer Name: Texas Instruments - Symbol Style: parametric-v1 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps25940.pdf - Manufacturer Part Number: TPS25940LRVCR - Role Details: USB-C VBUS eFuse; true reverse current blocking; ~1 A current limit; UVLO ~4.3 V, OVP ~6.0 V **Pins:** - ~FLT [pin 20] - DEVSLP [pin 1] - DVDT [pin 18] - EN [pin 14] - EP [pin 21] - GND [pin 16] - ILIM [pin 17] - IMON [pin 19] - IN_1 [pin 9] - IN_2 [pin 10] - IN_3 [pin 11] - IN_4 [pin 12] - IN_5 [pin 13] - OUT_1 [pin 4] - OUT_2 [pin 5] - OUT_3 [pin 6] - OUT_4 [pin 7] - OUT_5 [pin 8] - OVP [pin 15] - PGOOD [pin 2] - PGTH [pin 3] ### U3 — [MP28301GG-Z](https://www.flux.ai/monolithicpower/mp28301gg-z~ths.md) - Manufacturer Name: Monolithic Power Systems - Product Image Url: https://www.monolithicpower.com/pub/media/catalog/product/m/p/mp28301_tac.jpg - Manufacturer Part Number: MP28301GG-Z - Role Details: 700 mA 3.3 V buck output selected to avoid LDO heat near temperature sensor - Package or Case Code: QFN-2x2_MP28301_MNP - Role: Buck Regulator - Product Info Url: https://www.monolithicpower.com/en/catalog/product/view/id/2983?utm_source=ultralibrarian&utm_medium=component_search&utm_campaign=listing - Datasheet URL: https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP28301 **Pins:** - CTRL1 [pin 2] - CTRL2 [pin 3] - CTRL3 [pin 4] - CTRL4 [pin 5] - CTRL5 [pin 6] - GND [pin 8] - OUT1 [pin 1] - OUT2 [pin 12] - PG1 [pin 7] - SW [pin 9] - VIN1 [pin 10] - VIN2 [pin 11] ### U4 — [SHT41-AD1B-R2](https://www.flux.ai/adrian95/sht41-ad1b-r2.md) - Role Details: I2C T/RH sensor, address 0x44, local decoupling, place away from heat sources - Manufacturer Name: Sensirion - Role: Temperature/Humidity Sensor - Datasheet URL: https://sensirion.com/media/documents/33FD6951/67EB9032/HT_DS_Datasheet_SHT4x_5.pdf - Part Type: Sensors - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SHT41-AD1B-R2 **Pins:** - SCL [pin 2] - SDA [pin 1] - VDD [pin 3] - VSS [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/khoado/usb-c-wifi-ble-th-sensor~3e](https://www.flux.ai/khoado/usb-c-wifi-ble-th-sensor~3e).* --- *Generated from [https://www.flux.ai/khoado/usb-c-wifi-ble-th-sensor~3e](https://www.flux.ai/khoado/usb-c-wifi-ble-th-sensor~3e)*