# ESP32 Enviro Monitor ## Description ESP32 Environmental Monitor PCB with USB‑C, 500 mA LiPo Charging (TP4056, R9=2.4 kΩ), and I2C Sensors – 50 mm × 35 mm, 2‑Layer ## Project Details - **Owner:** ahmetbektes - **Created:** 12/15/2025 - **Last Updated:** 12/15/2025 - **Visibility:** Public - **Board Size:** 50 mm × 35 mm - **Role:** Power Management - **Domain:** Consumer Electronics - **description:** ESP32 Environmental Monitor PCB with USB‑C, LiPo Charging, and I2C Sensors (50 mm × 35 mm, 2‑Layer) - **Power Requirements:** USB - **Connectivity:** WiFi - **Part Type:** Power Management - **Role Details:** Complete ESP32 enviro monitor with USB-C, LiPo charging, and sensors - **Manufacturing Quantity Target:** 10 - **Operating Voltage:** 3.3V - **Software:** Arduino ## Key Components ### D1 — [MSCD104H](https://www.flux.ai/lcsc/mscd104h~n2sp.md) - Role Details: Diode-OR for combining USB and battery inputs - JLCPCB Part Class: Extended Part - Mount: Surface Mount - Max Reverse Voltage: 30V - LCSC Part Number: C189958 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1810010231_ZOWIE-Tech-MSCD104H_C189958.pdf - Max Current: 1A - Role: Reverse Polarity Protection - Part Type: Diode - Diode Type: Schottky - Manufacturer Name: ON Semiconductor - Manufacturer Part Number: NRVB130T1G - Allow Substitutes: Yes - Product Info Url: https://lcsc.com/product-detail/Diodes-Rectifiers-Fast-Recovery_MSCD104H_C189958.html - Package or Case Code: D_SMA **Pins:** - 1 [pin 1] - 2 [pin 2] ### D1 — [MSCD104H](https://www.flux.ai/lcsc/mscd104h~n2sp.md) - Product Info Url: https://lcsc.com/product-detail/Diodes-Rectifiers-Fast-Recovery_MSCD104H_C189958.html - LCSC Part Number: C189958 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1810010231_ZOWIE-Tech-MSCD104H_C189958.pdf - Package or Case Code: D0805-RD - Role Details: Diode-OR for combining USB and battery inputs - Role: Reverse Polarity Protection - Part Type: Schottky Barrier Diodes (SBD) - Manufacturer Name: Zowie(智威) - Package: D0805-RD - JLCPCB Part Class: Extended Part - Manufacturer Part Number: MSCD104H **Pins:** - 1 [pin 1] - 2 [pin 2] ### D2 — [MSCD104H](https://www.flux.ai/lcsc/mscd104h~n2sp.md) - Role: Reverse Polarity Protection - Diode Type: Schottky - Max Reverse Voltage: 30V - Allow Substitutes: Yes - JLCPCB Part Class: Extended Part - LCSC Part Number: C189958 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1810010231_ZOWIE-Tech-MSCD104H_C189958.pdf - Manufacturer Name: ON Semiconductor - Role Details: Diode-OR for combining USB and battery inputs - Part Type: Diode - Manufacturer Part Number: NRVB130T1G - Product Info Url: https://lcsc.com/product-detail/Diodes-Rectifiers-Fast-Recovery_MSCD104H_C189958.html - Mount: Surface Mount - Package or Case Code: D_SMA - Max Current: 1A **Pins:** - 1 [pin 1] - 2 [pin 2] ### D2 — [MSCD104H](https://www.flux.ai/lcsc/mscd104h~n2sp.md) - Manufacturer Name: Zowie(智威) - Part Type: Schottky Barrier Diodes (SBD) - Package: D0805-RD - Manufacturer Part Number: MSCD104H - JLCPCB Part Class: Extended Part - Role: Reverse Polarity Protection - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1810010231_ZOWIE-Tech-MSCD104H_C189958.pdf - LCSC Part Number: C189958 - Product Info Url: https://lcsc.com/product-detail/Diodes-Rectifiers-Fast-Recovery_MSCD104H_C189958.html - Package or Case Code: D0805-RD - Role Details: Diode-OR for combining USB and battery inputs **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [2024100002](https://www.flux.ai/adrian95/2024100002~atk.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/834/202410002_Pkg_Spec.pdf - Part Type: Connector - Manufacturer Name: Molex - Role Details: Power and data interface - Manufacturer Part Number: 2024100002 **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DA- [pin A7] - DA+ [pin A6] - DB- [pin B7] - DB+ [pin B6] - GND1 [pin A1] - GND2 [pin A12] - GND3 [pin B1] - GND4 [pin B12] - RX1- [pin B10] - RX1+ [pin B11] - RX2- [pin A10] - RX2+ [pin A11] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD1 [pin SH1] - SHIELD2 [pin SH2] - SHIELD3 [pin SH3] - SHIELD4 [pin SH4] - TX1- [pin A3] - TX1+ [pin A2] - TX2- [pin B3] - TX2+ [pin B2] - VBUS1 [pin A4] - VBUS2 [pin A9] - VBUS3 [pin B4] - VBUS4 [pin B9] ### J2 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Role Details: JST-PH 2-pin battery connector - JLCPCB Part Class: Extended Part - Connector Positions: 2 - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Wire To Board / Wire To Wire Connector - Connector Gender: Male - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Connector Rows: 1 - Package or Case Code: CONN-TH_B2B-PH-K-S - Manufacturer Name: JST - Role: Connector - Connector Type: Wire To Board Connector - LCSC Part Number: C131337 - Connector Pitch: 2mm **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Connector Type: Wire To Board Connector - LCSC Part Number: C131337 - Connector Pitch: 2mm - Manufacturer Name: JST - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Connector Positions: 2 - Part Type: Wire To Board / Wire To Wire Connector - Role: Connector - Connector Gender: Male - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - Connector Rows: 1 - Package or Case Code: CONN-TH_B2B-PH-K-S - Role Details: JST-PH 2-pin battery connector - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] ### J3 — [61300411121](https://www.flux.ai/adrian95/61300411121~pw9.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - Part Type: Connector - Datasheet URL: https://www.we-online.com/components/products/datasheet/61300411121.pdf - Package: HDRV4W95P0X254_1X4_1016X254X854P - Package or Case Code: HDRV4W95P0X254_1X4_1016X254X854P - Manufacturer Name: Wurth Elektronik - Role Details: OLED display header - Manufacturer Part Number: 61300411121 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### Q1 — [PN2222ATF](https://www.flux.ai/jecstronic/pn2222atf~d16.md) - Manufacturer Part Number: PN2222ATF - Role: Switching - Footprint: TO-92_Inline - Part Type: Transistor - Role Details: Auto-programming NPN transistor - Package or Case Code: 92-TO - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.onsemi.com/pdf/datasheet/pn2222a-d.pdf - Manufacturer Name: onsemi **Pins:** - B [pin 2] - C [pin 3] - E [pin 1] ### Q2 — [PN2222ATF](https://www.flux.ai/jecstronic/pn2222atf~d16.md) - Datasheet URL: https://www.onsemi.com/pdf/datasheet/pn2222a-d.pdf - Manufacturer Name: onsemi - Package or Case Code: 92-TO - License: https://creativecommons.org/licenses/by/4.0/ - Role: Switching - Part Type: Transistor - Footprint: TO-92_Inline - Manufacturer Part Number: PN2222ATF - Role Details: Auto-programming NPN transistor **Pins:** - B [pin 2] - C [pin 3] - E [pin 1] ### U1 — [ESP32-WROOM-32E](https://www.flux.ai/lcsc/esp32-wroom-32e~pa8i.md) - JLCPCB Part Class: Extended Part - Package: WIFI-SMD_ESP32-WROOM-32E-A - Manufacturer Name: ESPRESSIF(乐鑫) - Role: Main MCU - Package or Case Code: WIFI-SMD_ESP32-WROOM-32E-A - Part Type: WiFi Modules - LCSC Part Number: C2973652 - Manufacturer Part Number: ESP32-WROOM-32E **Pins:** - 3V3 [pin 2] - EN [pin 3] - GND [pin 1] - GND [pin 15] - GND [pin 38] - GND [pin 39] - IO0 [pin 25] - IO12 [pin 14] - IO13 [pin 16] - IO14 [pin 13] - IO15 [pin 23] - IO16 [pin 27] - IO17 [pin 28] - IO18 [pin 30] - IO19 [pin 31] - IO2 [pin 24] - IO21 [pin 33] - IO22 [pin 36] - IO23 [pin 37] - IO25 [pin 10] - IO26 [pin 11] - IO27 [pin 12] - IO32 [pin 8] - IO33 [pin 9] - IO34 [pin 6] - IO35 [pin 7] - IO4 [pin 26] - IO5 [pin 29] - NC [pin 17] - NC [pin 18] - NC [pin 19] - NC [pin 20] - NC [pin 21] - NC [pin 22] - NC [pin 32] - RXD0 [pin 34] - SENSOR_VN [pin 5] - SENSOR_VP [pin 4] - TXD0 [pin 35] ### U1 — [ESP32-WROOM-32E](https://www.flux.ai/lcsc/esp32-wroom-32e~pa8i.md) - Manufacturer Part Number: ESP32-WROOM-32E - LCSC Part Number: C2973652 - Manufacturer Name: ESPRESSIF(乐鑫) - JLCPCB Part Class: Extended Part - Part Type: WiFi Modules - Role: Main MCU - Package or Case Code: WIFI-SMD_ESP32-WROOM-32E-A **Pins:** - 3V3 [pin 2] - EN [pin 3] - GND [pin 1] - GND [pin 15] - GND [pin 38] - GND [pin 39] - IO0 [pin 25] - IO12 [pin 14] - IO13 [pin 16] - IO14 [pin 13] - IO15 [pin 23] - IO16 [pin 27] - IO17 [pin 28] - IO18 [pin 30] - IO19 [pin 31] - IO2 [pin 24] - IO21 [pin 33] - IO22 [pin 36] - IO23 [pin 37] - IO25 [pin 10] - IO26 [pin 11] - IO27 [pin 12] - IO32 [pin 8] - IO33 [pin 9] - IO34 [pin 6] - IO35 [pin 7] - IO4 [pin 26] - IO5 [pin 29] - NC [pin 17] - NC [pin 18] - NC [pin 19] - NC [pin 20] - NC [pin 21] - NC [pin 22] - NC [pin 32] - RXD0 [pin 34] - SENSOR_VN [pin 5] - SENSOR_VP [pin 4] - TXD0 [pin 35] ### U2 — [TP4056](https://www.flux.ai/lcsc/tp4056~5yzc.md) - Package or Case Code: ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP - Package: ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP - Role Details: Single-cell LiPo charger - Manufacturer Part Number: TP4056 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409241408_UMW-Youtai-Semiconductor-Co---Ltd--TP4056_C725790.pdf - LCSC Part Number: C725790 - JLCPCB Part Class: Extended Part - Manufacturer Name: UMW(友台半导体) - Part Type: Battery Management ICs - Product Info Url: https://lcsc.com/product-detail/PMIC-Battery-Management_UMW-Youtai-Semiconductor-Co-Ltd-TP4056_C725790.html - Role: Battery Charger **Pins:** - ~{CHRG} [pin 7] - ~{STDBY} [pin 6] - BAT [pin 5] - CE [pin 8] - EP [pin 9] - GND [pin 3] - PROG [pin 2] - TEMP [pin 1] - VCC [pin 4] ### U2 — [TP4056](https://www.flux.ai/lcsc/tp4056~5yzc.md) - Product Info Url: https://lcsc.com/product-detail/PMIC-Battery-Management_UMW-Youtai-Semiconductor-Co-Ltd-TP4056_C725790.html - Part Type: Battery Management ICs - Package: ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP - Manufacturer Name: UMW(友台半导体) - Role Details: Single-cell LiPo charger - LCSC Part Number: C725790 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409241408_UMW-Youtai-Semiconductor-Co---Ltd--TP4056_C725790.pdf - JLCPCB Part Class: Extended Part - Manufacturer Part Number: TP4056 - Role: Battery Charger - Package or Case Code: ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP **Pins:** - ~{CHRG} [pin 7] - ~{STDBY} [pin 6] - BAT [pin 5] - CE [pin 8] - EP [pin 9] - GND [pin 3] - PROG [pin 2] - TEMP [pin 1] - VCC [pin 4] ### U3 — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33~34.md) - Role Details: 3.3V power supply - Manufacturer Name: AMS - Datasheet URL: http://www.advanced-monolithic.com/pdf/ds1117.pdf - Footprint: SOT-223 - Role: Linear Regulator - Package or Case Code: SOT-223 - Manufacturer Part Number: AMS1117-3.3 - Symbol Style: Parametric - Part Type: Integrated Circuit - Package: SOT-223 - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] ### U4 — [CP2102N-A02-GQFN24](https://www.flux.ai/lcsc/cp2102n-a02-gqfn24~cpln.md) - Part Type: Interface - Controllers - Footprint: QFN-24_L4.0-W4.0-P0.50-TL-EP2.5 - Package: QFN-24_L4.0-W4.0-P0.50-TL-EP2.5 - JLCPCB Part Class: Extended Part - Role: USB-UART Bridge - Package or Case Code: 24-QFN - LCSC Part Number: C1550551 - Role Details: Programming and serial communication - Manufacturer Part Number: CP2102N-A02-GQFN24 - Manufacturer Name: SKYWORKS/SILICON LABS(芯科) **Pins:** - CTS [pin 18] - D- [pin 4] - D+ [pin 3] - DCD [pin 24] - DSR [pin 22] - DTR [pin 23] - EP [pin 25] - GND [pin 2] - GPIO.0/TXT [pin 14] - GPIO.1/RXT [pin 13] - GPIO.2/RS485 [pin 12] - GPIO.3/WAKEUP [pin 11] - NC [pin 10] - NC [pin 16] - RI/CLK [pin 1] - RSTb [pin 9] - RTS [pin 19] - RXD [pin 20] - SUSPEND [pin 17] - SUSPENDb [pin 15] - TXD [pin 21] - VBUS [pin 8] - VDD [pin 6] - VIO [pin 5] - VREGIN [pin 7] ### U4 — [CP2102N-A02-GQFN24](https://www.flux.ai/lcsc/cp2102n-a02-gqfn24~cpln.md) - Part Type: Interface - Controllers - Role Details: Programming and serial communication - JLCPCB Part Class: Extended Part - Package or Case Code: QFN-24_L4.0-W4.0-P0.50-TL-EP2.5 - Role: USB-UART Bridge - Package: QFN-24_L4.0-W4.0-P0.50-TL-EP2.5 - LCSC Part Number: C1550551 - Manufacturer Part Number: CP2102N-A02-GQFN24 - Manufacturer Name: SKYWORKS/SILICON LABS(芯科) **Pins:** - CTS [pin 18] - D- [pin 4] - D+ [pin 3] - DCD [pin 24] - DSR [pin 22] - DTR [pin 23] - EP [pin 25] - GND [pin 2] - GPIO.0/TXT [pin 14] - GPIO.1/RXT [pin 13] - GPIO.2/RS485 [pin 12] - GPIO.3/WAKEUP [pin 11] - NC [pin 10] - NC [pin 16] - RI/CLK [pin 1] - RSTb [pin 9] - RTS [pin 19] - RXD [pin 20] - SUSPEND [pin 17] - SUSPENDb [pin 15] - TXD [pin 21] - VBUS [pin 8] - VDD [pin 6] - VIO [pin 5] - VREGIN [pin 7] ### U5 — [BME280](https://www.flux.ai/chaykak2/bme280~vm.md) - Manufacturer Name: Bosch Sensortec - Role Details: Environmental sensor (I2C) - Datasheet URL: https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bme280-ds002.pdf - Manufacturer Part Number: BME280 - Part Type: Sensor - Role: Sensor **Pins:** - CSB [pin 2] - GND [pin 7] - GND [pin 1] - MISO [pin 5] - MOSI [pin 3] - SCK [pin 4] - VDD [pin 8] - VDDIO [pin 6] ### U6 — [SGP30-2.5k](https://www.flux.ai/lcsc/sgp30-2p5k~5qlf.md) - Manufacturer Name: Sensirion(瑞士盛思锐) - Footprint: DFN-6_L2.5-W2.5-P0.8-BL-EP - Role: Sensor - LCSC Part Number: C514454 - Manufacturer Part Number: SGP30-2.5k - JLCPCB Part Class: Extended Part - Package or Case Code: 6-DFN - Role Details: Air quality sensor (I2C) - Part Type: Gas Sensors **Pins:** - EP [pin 7] - R [pin 4] - SCL [pin 6] - SDA [pin 3] - VDD [pin 1] - VDDH [pin 5] - VSS [pin 2] ### U6 — [SGP30-2.5k](https://www.flux.ai/lcsc/sgp30-2p5k~5qlf.md) - JLCPCB Part Class: Extended Part - Manufacturer Part Number: SGP30-2.5k - Part Type: Gas Sensors - Package or Case Code: DFN-6_L2.5-W2.5-P0.8-BL-EP - Role Details: Air quality sensor (I2C) - Manufacturer Name: Sensirion(瑞士盛思锐) - Role: Sensor - LCSC Part Number: C514454 **Pins:** - EP [pin 7] - R [pin 4] - SCL [pin 6] - SDA [pin 3] - VDD [pin 1] - VDDH [pin 5] - VSS [pin 2] ### U7 — [USBLC6-2SC6](https://www.flux.ai/collinsemasi/usblc6-2sc6~jt.md) - Role Details: ESD protection for USB D+ and D- lines - Package or Case Code: SOT-23-6 - Role: Protection - Manufacturer Part Number: USBLC6-2SC6 - Unidirectional Channels: 2 - Voltage - Breakdown: 6V - 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 - Voltage - Reverse Standoff: 5.25V - Footprint: SOT-23-6 - Operating Temperature: -40°C ~ 150°C (TJ) - Package: SOT-23-6 - Part Type: ESD PROTECTION - Manufacturer Name: STMicroelectronics **Pins:** - 1 [pin 1] - 3 [pin 3] - 4 [pin 4] - 6 [pin 6] - GND [pin 2] - VBUS [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ahmetbektes/esp32-enviro-monitor~w3](https://www.flux.ai/ahmetbektes/esp32-enviro-monitor~w3).* --- *Generated from [https://www.flux.ai/ahmetbektes/esp32-enviro-monitor~w3](https://www.flux.ai/ahmetbektes/esp32-enviro-monitor~w3)*