# Meshtastic ESP32-S3 Sensor Node ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** eddie2020 - **Created:** 4/20/2026 - **Last Updated:** 4/23/2026 - **Visibility:** Public ## Key Components ### D1 — [SP0502BAHT](https://www.flux.ai/kicad-part-library/sp0502baht~nla.md) - Manufacturer Part Number: SP0502BAHT - Manufacturer Name: Texas Instruments Inc. - Role Details: Clamp transient events on USB power input lines - Package or Case Code: SOT-23 - Datasheet URL: http://www.littelfuse.com//media/files/littelfuse/technical%20resources/documents/data%20sheets/sp05xxba.pdf - Role: ESD Protection - Package: SOT-23 **Pins:** - A [pin 3] - K [pin 1] - K [pin 2] ### J1 — [54-00285](https://www.flux.ai/adrian95/54-00285~482.md) - Manufacturer Part Number: 54-00285 - Datasheet URL: https://tensility.s3.us-west-2.amazonaws.com/uploads/pdffiles/54-00285.pdf - Manufacturer Name: Tensility International Corp - Role: USB-C Power Input - Package: USB-C Power Only - Role Details: USB-C sink connector with CC1 and CC2 pull-down resistors for 5V input - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - CC1 [pin A5] - CC2 [pin B5] - GND_A [pin A12] - GND_B [pin B12] - VBUS_A [pin A9] - VBUS_B [pin B9] ### J2 — [B2B-PH-K-S](https://www.flux.ai/adrian95/b2b-ph-k-s~fx.md) - Part Type: Connector - Manufacturer Part Number: B2B-PH-K-S - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Package or Case Code: JST_B2B-PH-K-S - Package: JST-PH-2 Through Hole - Role: Battery Connector - Manufacturer Name: JST - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Single-cell LiPo battery input connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J3 — [132289](https://www.flux.ai/adrian95/132289~90u.md) - Manufacturer Part Number: CONN_001P_000C_1 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Amphenol RF - Part Type: Connectors - Datasheet URL: https://www.amphenolrf.com/en-us/assets/file/4065786470/ - Package: Edge Mount SMA - Role: RF Connector - Role Details: SMA antenna connector for SX1262 RF output **Pins:** - 1 [pin 1] ### LED1 — [0603GBD0790S01](https://www.flux.ai/adrian95/0603gbd0790s01~iak.md) - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 0603GBD0790S01 - Manufacturer Name: ORIENTAL TECHNOLOGY - Role: Power LED - Package: 0603 - Role Details: Indicates presence of regulated 3.3V rail - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/4336/0603GBD0790S01.pdf **Pins:** - A [pin 2] - K [pin 1] ### LED2 — [KT-0603B](https://www.flux.ai/adrian95/kt-0603b~oob.md) - Role: Status LED - Part Type: LED - Package: 0603 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.lcsc.com/datasheet/C2288.pdf - LCSC Part Number: C2288 - Role Details: General purpose activity indicator driven by ESP32 GPIO - Manufacturer Part Number: KT-0603B - Manufacturer Name: Hubei KENTO Elec **Pins:** - A [pin 2] - K [pin 1] ### Q1 — [2N7002K](https://www.flux.ai/jecstronic/2n7002k~8y.md) - Manufacturer Name: MDD - Role: Auto Reset MOSFET - Manufacturer Part Number: 2N7002K - Datasheet URL: https://www.infineon.com/dgdl/Infineon-2N7002-DS-v02_04-en.pdf - Role Details: USB-UART DTR/RTS inverter and gating MOSFET for ESP32 EN/BOOT auto programming - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Package: SOT-23 **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q2 — [2N7002K](https://www.flux.ai/jecstronic/2n7002k~8y.md) - Manufacturer Name: MDD - Role Details: USB-UART DTR/RTS inverter and gating MOSFET for ESP32 EN/BOOT auto programming - Manufacturer Part Number: 2N7002K - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Role: Auto Reset MOSFET - Package: SOT-23 - Datasheet URL: https://www.infineon.com/dgdl/Infineon-2N7002-DS-v02_04-en.pdf **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### SW1 — [L101011MS02Q](https://www.flux.ai/adrian95/l101011ms02q~ck2.md) - Manufacturer Name: C&K - Manufacturer Part Number: L101011MS02Q - Package: SPST Slide Switch - Role Details: Battery input power switch between battery positive and system rail - License: https://creativecommons.org/licenses/by/4.0/ - Role: Power Switch - Datasheet URL: https://www.ckswitches.com/media/1423/l.pdf - Part Type: Switch **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [ESP32-S3FN8](https://www.flux.ai/adrian95/esp32-s3fn8~7y7.md) - Manufacturer Name: Espressif Systems - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Manufacturer Part Number: ESP32-S3FN8 - Datasheet URL: https://www.snapeda.com/parts/ESP32-S3FN8/Espressif%20Systems/datasheet/ - Symbol Style: parametric-v1 **Pins:** - CHIP_PU [pin 4] - GND [pin 57] - GPIO0 [pin 5] - GPIO1 [pin 6] - GPIO10 [pin 15] - GPIO11 [pin 16] - GPIO12 [pin 17] - GPIO13 [pin 18] - GPIO14 [pin 19] - GPIO17 [pin 23] - GPIO18 [pin 24] - GPIO19 [pin 25] - GPIO2 [pin 7] - GPIO20 [pin 26] - GPIO21 [pin 27] - GPIO3 [pin 8] - GPIO33 [pin 38] - GPIO34 [pin 39] - GPIO35 [pin 40] - GPIO36 [pin 41] - GPIO37 [pin 42] - GPIO38 [pin 43] - GPIO4 [pin 9] - GPIO45 [pin 51] - GPIO46 [pin 52] - GPIO5 [pin 10] - GPIO6 [pin 11] - GPIO7 [pin 12] - GPIO8 [pin 13] - GPIO9 [pin 14] - LNA_IN [pin 1] - MTCK [pin 44] - MTDI [pin 47] - MTDO [pin 45] - MTMS [pin 48] - SPICLK [pin 33] - SPICLK_N [pin 36] - SPICLK_P [pin 37] - SPICS0 [pin 32] - SPICS1 [pin 28] - SPID [pin 35] - SPIHD [pin 30] - SPIQ [pin 34] - SPIWP [pin 31] - U0RXD [pin 50] - U0TXD [pin 49] - VDD_SPI [pin 29] - VDD3P3 [pin 3] - VDD3P3 [pin 2] - VDD3P3_CPU [pin 46] - VDD3P3_RTC [pin 20] - VDDA1 [pin 55] - VDDA2 [pin 56] - XTAL_32K_N [pin 22] - XTAL_32K_P [pin 21] - XTAL_N [pin 53] - XTAL_P [pin 54] ### U2 — [SX1262IMLTRT](https://www.flux.ai/jecstronic/sx1262imltrt~l3n.md) - Part Type: Integrated Circuit - Datasheet URL: https://www.rfsolutions.co.uk/downloads/1537522406DS_SX1261-2_V1.1_SEMTECH.pdf - Manufacturer Name: Semtech Corporation - Manufacturer Part Number: SX1262IMLTRT - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - BUSY [pin 14] - DCC_SW [pin 9] - DIO1 [pin 13] - DIO2 [pin 12] - DIO3 [pin 6] - GND_1 [pin 2] - GND_2 [pin 5] - GND_3 [pin 8] - GND_4 [pin 20] - GND_5 [pin 25] - MISO [pin 16] - MOSI [pin 17] - NRESET [pin 15] - NSS [pin 19] - RFI_N [pin 22] - RFI_P [pin 21] - RFO [pin 23] - SCK [pin 18] - VBAT [pin 10] - VBAT_IO [pin 11] - VDD_IN [pin 1] - VR_PA [pin 24] - VREG [pin 7] - XTA [pin 3] - XTB [pin 4] ### U5 — [CH340C](https://www.flux.ai/vasy_skral/ch340c~xfo.md) - Manufacturer Part Number: CH340C - Package: SOIC-16 - Manufacturer Name: Wah - Datasheet URL: https://datasheet.lcsc.com/szlcsc/Jiangsu-Qin-Heng-CH340C_C84681.pdf - Part Type: Integrated Circuit - Role Details: USB to UART bridge for ESP32-S3 programming and serial console - Role: USB-UART Bridge **Pins:** - ~CTS [pin 9] - ~DCD [pin 12] - ~DSR [pin 10] - ~DTR [pin 13] - ~RI [pin 11] - ~RTS [pin 14] - GND [pin 1] - NC [pin 7] - NC [pin 8] - R232 [pin 15] - RXD [pin 3] - TXD [pin 2] - UD- [pin 6] - UD+ [pin 5] - V3 [pin 4] - VCC [pin 16] ### U6 — [XC6220B331MR](https://www.flux.ai/kicad-part-library/xc6220b331mr~l55.md) - Manufacturer Part Number: XC6220B331MR - Package or Case Code: SOT-23-5 - Role Details: Low dropout regulator generating 3.3V rail for ESP32, SX1262, and sensors - Role: 3.3V Regulation - Datasheet URL: https://www.torexsemi.com/file/xc6220/XC6220.pdf - Package: SOT-23-5 **Pins:** - CE [pin 3] - GND [pin 2] - NC [pin 4] - VIN [pin 1] - VOUT [pin 5] ### U7 — [CN3791](https://www.flux.ai/adrian95/cn3791~qp8.md) - License: https://creativecommons.org/licenses/by/4.0/ - Package: SSOP-10 - Manufacturer Part Number: CN3791 - Role Details: Solar and USB derived LiPo charging controller for single-cell battery - Part Type: Integrated Circuit - Role: Battery Charger - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810010241_ShangHai-Consonance-Elec-CN3791_C154992.pdf - Manufacturer Name: ShangHai Consonance Elec **Pins:** - ~CHRG [pin 3] - ~DONE [pin 4] - BAT [pin 7] - COM [pin 5] - CSP [pin 8] - DRV [pin 10] - GND [pin 2] - MPPT [pin 6] - VCC [pin 9] - VG [pin 1] ### X1 — [XVHEELNANF-40MHZ](https://www.flux.ai/lcsc/xvheelnanf-40mhz~u45h.md) - Package or Case Code: CRYSTAL-SMD_4P-L5.0-W3.2-BL - Role: Main Clock - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_TAITIEN-Elec-XVHEELNANF-40MHZ_C295530.pdf - Manufacturer Part Number: XVHEELNANF-40MHZ - Package: Crystal SMD 4P - Manufacturer Name: TAITIEN(泰艺电子) - Product Info Url: https://lcsc.com/product-detail/Others_TAITIEN-Elec-XVHEELNANF-40MHZ_C295530.html - JLCPCB Part Class: Extended Part - Part Type: Crystals - LCSC Part Number: C295530 - Role Details: 40MHz crystal connected to ESP32 XTAL_P and XTAL_N **Pins:** - GND [pin 4] - GND [pin 2] - OSC1 [pin 1] - OSC2 [pin 3] ### X2 — [NX2016SA-32MHZ-EXS00A-CS06654](https://www.flux.ai/intellugogroup/nx2016sa-32mhz-exs00a-cs06654~1u.md) - Role: LoRa Clock - Manufacturer Part Number: NX2016SA-32MHZ-EXS00A-CS06654 - Package: Crystal SMD 4P - Part Type: Oscillator - Frequency: 32MHz - Role Details: 32MHz crystal connected to SX1262 XTA and XTB - Package or Case Code: NX2016SA_NDK **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/eddie2020/meshtastic-esp32-s3-sensor-node~nv](https://www.flux.ai/eddie2020/meshtastic-esp32-s3-sensor-node~nv).* --- *Generated from [https://www.flux.ai/eddie2020/meshtastic-esp32-s3-sensor-node~nv](https://www.flux.ai/eddie2020/meshtastic-esp32-s3-sensor-node~nv)*