# USB-C Wi-Fi BLE Env Node ## Description Low-power consumer environmental sensor node with USB-C 5V input, Wi-Fi + Bluetooth connectivity, digital temperature/humidity sensing, and protected 5V-to-3.3V power architecture including reverse, OVP, UVLO, and OCP considerations. ## Project Details - **Owner:** arontech - **Created:** 5/23/2026 - **Last Updated:** 5/23/2026 - **Visibility:** Public ## Key Components ### D1 — [SMF5.0A](https://www.flux.ai/lcsc/smf5p0a~bz6b.md) - Max Reverse Voltage: 5V - JLCPCB Part Class: Extended Part - Part Type: TVS - Package or Case Code: SOD-123FL_L2.8-W1.8-LS3.6-RD - Manufacturer Name: Liown(里阳半导体) - LCSC Part Number: C2990427 - Datasheet URL: https://www.lcsc.com/datasheet/C2990427.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNRTlBbUVFXRldaXzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Forward Voltage: 0.45V to 0.55V (at 1A)V - Manufacturer Part Number: SMF5.0A - Diode Type: Schottky Diode **Pins:** - 1 [pin 1] - 2 [pin 2] ### D2 — [USBLC6-2SC6](https://www.flux.ai/vasy_skral/usblc6-2sc6~g1b.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: USBLC6-2SC6 - Part Type: Protection - Symbol Style: parametric-v1 - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/06/1d/48/9c/6c/20/4a/b2/CD00050750.pdf/files/CD00050750.pdf/jcr:content/translations/en.CD00050750.pdf - Manufacturer Name: STMicroelectronics - LCSC Part Number: C7519 **Pins:** - GND [pin 2] - I/O1 [pin 6] - I/O1 [pin 1] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### J1 — [USB4105-GF-A](https://www.flux.ai/adrian95/usb4105-gf-a~im9.md) - Manufacturer Name: GCT - Part Type: USB C - Manufacturer Part Number: USB4105-GF-A - Symbol Style: parametric-v1 - Datasheet URL: https://gct.co/files/specs/usb4105-spec.pdf - Manufacturer Name: GCT - License: https://creativecommons.org/licenses/by/4.0/ **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] ### S1 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - JLCPCB Part Class: Extended Part - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - Part Type: Tactile Switches - Manufacturer Part Number: TS-1088-AR02016 - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html - Manufacturer Name: XUNPU(讯普) - LCSC Part Number: C720477 **Pins:** - 1 [pin 1] - 2 [pin 2] ### S2 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - Manufacturer Part Number: TS-1088-AR02016 - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - Part Type: Tactile Switches - LCSC Part Number: C720477 - Manufacturer Name: XUNPU(讯普) - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [RP2040](https://www.flux.ai/vasy_skral/rp2040~kqt.md) - Manufacturer Part Number: RP2040 - Symbol Style: Parametric - Part Type: Microcontroller - Manufacturer Name: Raspberry Pi - Datasheet URL: https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ADC_AVDD [pin 43] - DVDD [pin 50] - DVDD [pin 23] - GND [pin 57] - GPIO0 [pin 2] - GPIO1 [pin 3] - GPIO10 [pin 13] - GPIO11 [pin 14] - GPIO12 [pin 15] - GPIO13 [pin 16] - GPIO14 [pin 17] - GPIO15 [pin 18] - GPIO16 [pin 27] - GPIO17 [pin 28] - GPIO18 [pin 29] - GPIO19 [pin 30] - GPIO2 [pin 4] - GPIO20 [pin 31] - GPIO21 [pin 32] - GPIO22 [pin 34] - GPIO23 [pin 35] - GPIO24 [pin 36] - GPIO25 [pin 37] - GPIO26/ADC0 [pin 38] - GPIO27/ADC1 [pin 39] - GPIO28/ADC2 [pin 40] - GPIO29/ADC3 [pin 41] - GPIO3 [pin 5] - GPIO4 [pin 6] - GPIO5 [pin 7] - GPIO6 [pin 8] - GPIO7 [pin 9] - GPIO8 [pin 11] - GPIO9 [pin 12] - IOVDD [pin 10] - IOVDD [pin 49] - IOVDD [pin 33] - IOVDD [pin 1] - IOVDD [pin 22] - IOVDD [pin 42] - QSPI_CSN [pin 56] - QSPI_SCLK [pin 52] - QSPI_SD0 [pin 53] - QSPI_SD1 [pin 55] - QSPI_SD2 [pin 54] - QSPI_SD3 [pin 51] - RUN [pin 26] - SWCLK [pin 24] - SWD [pin 25] - TESTEN [pin 19] - USB_DM [pin 46] - USB_DP [pin 47] - USB_VDD [pin 48] - VREG_VIN [pin 44] - VREG_VOUT [pin 45] - XIN [pin 20] - XOUT [pin 21] ### U2 — [TPS259474LRPWR](https://www.flux.ai/lcsc/tps259474lrpwr~74ql.md) - Package or Case Code: VQFN-10_L2.0-W2.0-P0.45-TL - LCSC Part Number: C2864845 - JLCPCB Part Class: Extended Part - Manufacturer Name: TI(德州仪器) - Manufacturer Part Number: TPS259474LRPWR - Role Details: USB-C 5V input protection and power-path control with adjustable UVLO/OVLO and ~1A current limit - Role: Protection **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] ### U3 — [TLV75733PDBVR](https://www.flux.ai/lcsc/tlv75733pdbvr~mr81.md) - Package or Case Code: SOT-23-5_L2.9-W1.6-P0.95-LS2.8-BL - Manufacturer Part Number: TLV75733PDBVR - Max Output Voltage: 3.3V - Role Details: 5V-to-3.3V regulation for ESP32-C3 and SHT40 with 1A output capability - LCSC Part Number: C485517 - Output Current: 1A - Dropout Voltage: 475mV@(1A) - Product Info Url: https://lcsc.com/product-detail/New-Arrivals_Texas-Instruments-Texas-Instruments-TLV75733PDBVR_C485517.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Texas-Instruments-TLV75733PDBVR_C485517.pdf - JLCPCB Part Class: Extended Part - Max Input Voltage: 5.5V - Operating Temperature: -40℃~+125℃@(Tj) - Part Type: Linear Voltage Regulators (LDO) - Role: Power Regulation - Manufacturer Name: TI(德州仪器) **Pins:** - EN [pin 3] - GND [pin 2] - IN [pin 1] - NC [pin 4] - OUT [pin 5] ### U4 — [ESP32-C3-MINI-1-N4](https://www.flux.ai/jecstronic/esp32-c3-mini-1-n4~wbz.md) - Symbol Style: parametric-v1 - Manufacturer Name: Espressif Systems - Role: MCU - Manufacturer Part Number: ESP32-C3-MINI-1-N4 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-c3-mini-1_datasheet_en.pdf - Role Details: Main controller and 2.4 GHz Wi-Fi/BLE radio for the environmental node **Pins:** - 3V3 [pin 3] - EN [pin 8] - GND [pin 51] - GND [pin 36] - GND [pin 49_9] - GND [pin 1] - GND [pin 49_6] - GND [pin 46] - GND [pin 49_3] - GND [pin 43] - GND [pin 49_7] - GND [pin 39] - GND [pin 14] - GND [pin 41] - GND [pin 37] - GND [pin 53] - GND [pin 42] - GND [pin 49_2] - GND [pin 49_1] - GND [pin 45] - GND [pin 11] - GND [pin 38] - GND [pin 52] - GND [pin 2] - GND [pin 48] - GND [pin 49_4] - GND [pin 40] - GND [pin 49_5] - GND [pin 49_8] - GND [pin 44] - GND [pin 47] - GND [pin 50] - IO0 [pin 12] - IO1 [pin 13] - IO10 [pin 16] - IO18 [pin 26] - IO19 [pin 27] - IO2 [pin 5] - IO3 [pin 6] - IO4 [pin 18] - IO5 [pin 19] - IO6 [pin 20] - IO7 [pin 21] - IO8 [pin 22] - IO9 [pin 23] - NC [pin 35] - NC [pin 4] - NC [pin 10] - NC [pin 32] - NC [pin 7] - NC [pin 9] - NC [pin 28] - NC [pin 24] - NC [pin 15] - NC [pin 34] - NC [pin 29] - NC [pin 17] - NC [pin 33] - NC [pin 25] - RXD0 [pin 30] - TXD0 [pin 31] ### U5 — [SHT40-AD1B-R3](https://www.flux.ai/cherepanyadima/sht40-ad1b-r3~8q.md) - Manufacturer Part Number: SHT40-AD1B-R3 - Datasheet URL: https://sensirion.com/media/documents/33FD6951/67EB9032/HT_DS_Datasheet_SHT4x_5.pdf - Part Type: Sensor - Manufacturer Name: Sensirion AG - Role Details: Ambient temperature and relative humidity sensing over I2C - Role: Sensor **Pins:** - SCL [pin 2] - SDA [pin 1] - VDD [pin 3] - VSS [pin 4] ### U6 — [STM32F405RGT6](https://www.flux.ai/jharwinbarrozo/stm32f405rgt6~ssm.md) - Datasheet URL: http://www.st.com/content/ccc/resource/technical/document/datasheet/ef/92/76/6d/bb/c2/4f/f7/DM00037051.pdf/files/DM00037051.pdf/jcr:content/translations/en.DM00037051.pdf - Manufacturer Part Number: STM32F405RGT6 - Manufacturer Name: STMicroelectronics - Part Type: Integrated Circuit **Pins:** - BOOT0 [pin 60] - NRST [pin 7] - PA0_WKUP [pin 14] - PA1 [pin 15] - PA10 [pin 43] - PA11 [pin 44] - PA12 [pin 45] - PA13 [pin 46] - PA14 [pin 49] - PA15 [pin 50] - PA2 [pin 16] - PA3 [pin 17] - PA4 [pin 20] - PA5 [pin 21] - PA6 [pin 22] - PA7 [pin 23] - PA8 [pin 41] - PA9 [pin 42] - PB0 [pin 26] - PB1 [pin 27] - PB10 [pin 29] - PB11 [pin 30] - PB12 [pin 33] - PB13 [pin 34] - PB14 [pin 35] - PB15 [pin 36] - PB2 [pin 28] - PB3 [pin 55] - PB4 [pin 56] - PB5 [pin 57] - PB6 [pin 58] - PB7 [pin 59] - PB8 [pin 61] - PB9 [pin 62] - PC0 [pin 8] - PC1 [pin 9] - PC10 [pin 51] - PC11 [pin 52] - PC12 [pin 53] - PC13 [pin 2] - PC14 [pin 3] - PC15 [pin 4] - PC2 [pin 10] - PC3 [pin 11] - PC4 [pin 24] - PC5 [pin 25] - PC6 [pin 37] - PC7 [pin 38] - PC8 [pin 39] - PC9 [pin 40] - PD2 [pin 54] - PH0 [pin 5] - PH1 [pin 6] - VBAT [pin 1] - VCAP_1 [pin 31] - VCAP_2 [pin 47] - VDD1 [pin 19] - VDD2 [pin 32] - VDD3 [pin 48] - VDD4 [pin 64] - VDDA [pin 13] - VSS1 [pin 18] - VSS2 [pin 63] - VSSA [pin 12] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/arontech/usb-c-wi-fi-ble-env-node~o0](https://www.flux.ai/arontech/usb-c-wi-fi-ble-env-node~o0).* --- *Generated from [https://www.flux.ai/arontech/usb-c-wi-fi-ble-env-node~o0](https://www.flux.ai/arontech/usb-c-wi-fi-ble-env-node~o0)*