# Puzzled Lavender Robot Maid ## Description Integration of EC800M-CN LTE Module via Modem_Conn Placeholders on ESP32-DevKitC Carrier with Parked Power, Control, SIM, RF, and USB Nets ## Project Details - **Owner:** progr - **Created:** 1/26/2026 - **Last Updated:** 1/26/2026 - **Visibility:** Public - **System Architecture:** ```mermaid flowchart TD ESP32[ESP32-DevKitC] REG[TPS62130ARGTR VBAT Regulator] MODEM[EC800M-CN Modem] SIM[SMN-305 Nano-SIM Holder] ANT1[Chip Antenna with Pi-Match Network] UFL[U.FL Connector with 0 Ohm Link] USB[Optional USB Interface] ESP32 -->|UART/Control| MODEM REG -->|VBAT| MODEM MODEM -->|SIM_VCC, SIM_IO, SIM_CLK, SIM_RST| SIM MODEM -->|RF_OUT| ANT1 MODEM -->|RF_OUT| UFL ESP32 -->|USB D+/D-| USB ``` - **Power Requirements:** USB - **Connectivity:** Cellular - **ERC Findings:** 63 components missing Manufacturer Part Numbers (MPNs); no missing footprints - **Domain:** Telecommunications ## Key Components ### ANT1 — [YC0001AA](https://www.flux.ai/adrian95/yc0001aa~h38.md) - Role Details: Chip antenna for EC800M-CN RF output - Manufacturer Part Number: YC0001AA - Part Type: Antenna - Role: Antenna - Datasheet URL: https://www.quectel.com/wp-content/uploads/2022/04/Quectel_Antenna_YC0001AA_Datasheet_V2.5.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Quectel **Pins:** - FEED [pin 3] - NOT_USED_1 [pin 1] - NOT_USED_10 [pin 12] - NOT_USED_11 [pin 13] - NOT_USED_12 [pin 14] - NOT_USED_13 [pin 15] - NOT_USED_14 [pin 16] - NOT_USED_2 [pin 2] - NOT_USED_3 [pin 5] - NOT_USED_4 [pin 6] - NOT_USED_5 [pin 7] - NOT_USED_6 [pin 8] - NOT_USED_7 [pin 9] - NOT_USED_8 [pin 10] - NOT_USED_9 [pin 11] - RETURN/GND [pin 4] ### Cpi1 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Package: SMD_0402_1005Metric - Manufacturer Part Number: CC0402JRNPO1R0BB - Manufacturer Name: Murata - Capacitance: 1pF - Role Details: Pi-match network capacitor - Part Type: Non-Polarized Capacitor - Role: RF Tuning / Matching **Pins:** - P1 [pin 1] - P2 [pin 2] ### Cpi2 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Part Type: Non-Polarized Capacitor - Capacitance: 1pF - Manufacturer Name: Murata - Role Details: Pi-match network capacitor - Manufacturer Part Number: CC0402JRNPO1R0BB - Package: SMD_0402_1005Metric - Role: RF Tuning / Matching **Pins:** - P1 [pin 1] - P2 [pin 2] ### D1 — [ESDA6V1BC6](https://www.flux.ai/kicad-part-library/esda6v1bc6~vep.md) - Datasheet URL: http://www.st.com/content/ccc/resource/technical/document/datasheet/21/07/21/e3/a8/df/42/a2/CD00001906.pdf/files/CD00001906.pdf/jcr:content/translations/en.CD00001906.pdf - Manufacturer Name: Texas Instruments Inc. - Package or Case Code: SOT-23-6 - Manufacturer Part Number: ESDA6V1BC6 - Role: Protection - Role Details: ESD protection for SIM interface lines (VCC, RST, CLK, Vpp) **Pins:** - COM [pin 5] - COM [pin 2] - TVS1 [pin 1] - TVS2 [pin 3] - TVS3 [pin 4] - TVS4 [pin 6] ### D2 — [ESDA6V1BC6](https://www.flux.ai/kicad-part-library/esda6v1bc6~vep.md) - Package or Case Code: SOT-23-6 - Manufacturer Name: Texas Instruments Inc. - Datasheet URL: http://www.st.com/content/ccc/resource/technical/document/datasheet/21/07/21/e3/a8/df/42/a2/CD00001906.pdf/files/CD00001906.pdf/jcr:content/translations/en.CD00001906.pdf - Role Details: ESD protection for EC800M-CN signal lines (UART, DTR, RTS, RESET, PWRKEY) - Role: Protection - Manufacturer Part Number: ESDA6V1BC6 **Pins:** - COM [pin 5] - COM [pin 2] - TVS1 [pin 1] - TVS2 [pin 3] - TVS3 [pin 4] - TVS4 [pin 6] ### D3 — [ESDA6V1BC6](https://www.flux.ai/kicad-part-library/esda6v1bc6~vep.md) - Datasheet URL: http://www.st.com/content/ccc/resource/technical/document/datasheet/21/07/21/e3/a8/df/42/a2/CD00001906.pdf/files/CD00001906.pdf/jcr:content/translations/en.CD00001906.pdf - Package or Case Code: SOT-23-6 - Manufacturer Name: Texas Instruments Inc. - Role Details: ESD protection for USB D+ and D- lines - Role: Protection - Manufacturer Part Number: ESDA6V1BC6 **Pins:** - COM [pin 5] - COM [pin 2] - TVS1 [pin 1] - TVS2 [pin 3] - TVS3 [pin 4] - TVS4 [pin 6] ### D4 — [SRDA3.3-6.TBT](https://www.flux.ai/baueralex174/srda3p3-6ptbt~pu.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SRDA3.3-6.TBT - Package or Case Code: SOIC127P600X170-9N - Manufacturer Name: Semtech Corporation - Role Details: ESD protection for SIM interface nets (<15 pF) - Compliance: Pb-Free,Halogen Free,RoHS/WEEE Compliant - Role: Protection - Part Type: SRDA3.3-6.TBT - Datasheet URL: https://www.semtech.com/uploads/documents/SRDA3.3-6.pdf **Pins:** - GND [pin 8] - I/O 1 [pin 1] - I/O 2 [pin 2] - I/O 3 [pin 4] - I/O 4 [pin 5] - I/O 5 [pin 6] - I/O 6 [pin 7] - VREF [pin 3] ### D5 — [USBLC6-2P6](https://www.flux.ai/kicad-part-library/usblc6-2p6~djt.md) - Package: SOT-666 - Package or Case Code: SOT-666 - Manufacturer Part Number: USBLC6-2P6 - Role: Protection - Datasheet URL: https://www.st.com/resource/en/datasheet/usblc6-2.pdf - Manufacturer Name: Texas Instruments Inc. - Role Details: ESD protection for USB D+ and D- lines (<1 pF) **Pins:** - GND [pin 2] - I/O1 [pin 6] - I/O1 [pin 1] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### J1 — [SMN-305](https://www.flux.ai/lcsc/smn-305~snw1.md) - Part Type: SIM Card Connectors - Manufacturer Name: XUNPU(讯普) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2012311032_XUNPU-SMN-305_C266890.pdf - Product Info Url: https://lcsc.com/product-detail/Connector-Card-Sockets_XUNPU-SMN-305_C266890.html - Manufacturer Part Number: SMN-305 - LCSC Part Number: C266890 - Connector Gender: Female - Package or Case Code: SIM-SMD_SMN-305 - Connector Type: Card Slot - Connector Pitch: 2.54mm - JLCPCB Part Class: Extended Part - Role Details: Nano-SIM card holder, flip type - Role: Connector **Pins:** - CLK [pin C3] - EP [pin 3] - EP [pin 4] - EP [pin 2] - EP [pin 1] - GND [pin C5] - I/O [pin C7] - RST [pin C2] - VCC [pin C1] - Vpp [pin C6] ### J2 — [61300811121](https://www.flux.ai/jecstronic/61300811121~m8u.md) - Package: 2.54mm 1×8 header - Role Details: Breakout header for UART, DTR, RTS, RESET, PWRKEY, STATUS, USB - Part Type: Connector - Role: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.we-online.com/components/products/datasheet/6130xx11121.pdf - Manufacturer Name: Würth Elektronik - Manufacturer Part Number: 61300811121 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] ### J3 — [U.FL-R-SMT-1(10)](https://www.flux.ai/jecstronic/upfl-r-smt-110~du.md) - Role Details: External antenna U.FL connector - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Hirose%20PDFs/EDC3-302540-10.tif.pdf - Role: Connector - Package: U.FL SMT - Part Type: Connector - Manufacturer Part Number: U.FL-R-SMT-1(10) - Manufacturer Name: Hirose Electric Co Ltd **Pins:** - Center_Contact [pin 2] - Outer_Contact [pin 1] - Outer_Contact [pin 3] ### J6 — [2024100002](https://www.flux.ai/adrian95/2024100002~atk.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Optional USB Host Interface - Role: Connector - Manufacturer Part Number: 2024100002 - Manufacturer Name: Molex - Package: Board Edge Receptacle - Part Type: Connector - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/834/202410002_Pkg_Spec.pdf **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] ### Lpi — [Generic Inductor](https://www.flux.ai/jharwinbarrozo/generic-inductor~wlv.md) - Part Type: Inductor - Inductor Type: Fixed - Manufacturer Part Number: LQG15HN1N0B02D - Inductance: 1nH - Role: RF Tuning / Matching - Package: SMD_0402_1005Metric - Role Details: Pi-match network inductor - Manufacturer Name: Murata **Pins:** - P1 [pin 1] - P2 [pin 2] ### SW1 — [PTS815](https://www.flux.ai/vasy_skral/pts815~6b.md) - Role: Debouncing - Manufacturer Name: C&K - Role Details: PWRKEY momentary push-button for EC800M-CN module PWRKEY input - Manufacturer Part Number: PTS815 SJM 250 SMTR LFS - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf **Pins:** - ~1 [pin 1] - ~2 [pin 2] - ~3 [pin 3] - ~4 [pin 4] ### SW2 — [PTS815](https://www.flux.ai/vasy_skral/pts815~6b.md) - Role Details: RESET momentary push-button for EC800M-CN module RESET input - Role: Debouncing - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf - Part Type: Switch - Manufacturer Part Number: PTS815 SJM 250 SMTR LFS - Manufacturer Name: C&K **Pins:** - ~1 [pin 1] - ~2 [pin 2] - ~3 [pin 3] - ~4 [pin 4] ### U1 — [ESP32-DEVKITC](https://www.flux.ai/vasy_skral/esp32-devkitc~7mc.md) - Manufacturer Name: Espressif Systems - Role: Host MCU - STATUS_pin: IO16 - Role Details: ESP32-WROOM-32E Development Board Host - Manufacturer Part Number: ESP32-DEVKITC - Symbol Style: Parametric - Datasheet URL: http://espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Development Boards **Pins:** - 3V3 [pin 1] - CLK [pin 20] - CMD [pin 18] - EN [pin 2] - EXT_5V [pin 19] - GND1 [pin 14] - GND2 [pin 32] - GND3 [pin 38] - IO0 [pin 25] - IO12 [pin 13] - IO13 [pin 15] - IO14 [pin 12] - 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 9] - IO26 [pin 10] - IO27 [pin 11] - IO32 [pin 7] - IO33 [pin 8] - IO34 [pin 5] - IO35 [pin 6] - IO4 [pin 26] - IO5 [pin 29] - RXD0 [pin 34] - SD0 [pin 21] - SD1 [pin 22] - SD2 [pin 16] - SD3 [pin 17] - SENSOR_VN [pin 4] - SENSOR_VP [pin 3] - TXD0 [pin 35] ### U2 — [TPS62130ARGTR](https://www.flux.ai/ryanf/tps62130argtr~8k9.md) - Manufacturer Part Number: TPS62130ARGTR - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps62130a.pdf?ts=1716649051225&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS62130A - Role Details: 5 V to VBAT step-down switching regulator, up to 3 A for EC800M-CN TX bursts - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Switching Regulator - Role: Power Conversion - Manufacturer Name: Texas Instruments - Package or Case Code: QFN50P300X300X50-17N **Pins:** - AGND [pin 6] - AGND [pin 17] - AVIN [pin 10] - DEF [pin 8] - EN [pin 13] - FB [pin 5] - FSW [pin 7] - PG [pin 4] - PGND [pin 16] - PGND [pin 15] - PVIN [pin 12] - PVIN [pin 11] - SS/TR [pin 9] - SW [pin 2] - SW [pin 3] - SW [pin 1] - VOS [pin 14] ### U3 — [TXS0108EPWR](https://www.flux.ai/adrian95/txs0108epwr~yg.md) - Datasheet URL: https://www.ti.com/lit/ds/symlink/txs0108e.pdf - Role: Logic-level Shifting - Manufacturer Name: Texas Instruments - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Bidirectional logic-level translator between ESP32 3.3V domain and EC800M-CN 1.8V domain - Part Type: Integrated Circuit - Manufacturer Part Number: TXS0108EPWR **Pins:** - A1 [pin 1] - A2 [pin 3] - A3 [pin 4] - A4 [pin 5] - A5 [pin 6] - A6 [pin 7] - A7 [pin 8] - A8 [pin 9] - B1 [pin 20] - B2 [pin 18] - B3 [pin 17] - B4 [pin 16] - B5 [pin 15] - B6 [pin 14] - B7 [pin 13] - B8 [pin 12] - GND [pin 11] - OE [pin 10] - VCCA [pin 2] - VCCB [pin 19] ### Y1 — [ECS-1612MV-260-CN-TR](https://www.flux.ai/adrian95/ecs-1612mv-260-cn-tr~2vf.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: ECS Inc. - Datasheet URL: https://ecsxtal.com/store/pdf/ECS-1612MV.pdf - Role Details: Reference oscillator for EC800M-CN module - Manufacturer Part Number: ECS-1612MV-260-CN-TR - Role: Signal Generation - Part Type: Oscillator **Pins:** - GND [pin 2] - OUTPUT [pin 3] - STAND-BY [pin 1] - VDD [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/progr/puzzled-lavender-robot-maid~sc](https://www.flux.ai/progr/puzzled-lavender-robot-maid~sc).* --- *Generated from [https://www.flux.ai/progr/puzzled-lavender-robot-maid~sc](https://www.flux.ai/progr/puzzled-lavender-robot-maid~sc)*