# Awful Cyan Lightcycle ## Description Integrated ESP32 IoT Audio/LTE Node with Completed Power, USB, Test, and RF Topology ## Project Details - **Owner:** theonlydo2 - **Created:** 11/27/2025 - **Last Updated:** 11/28/2025 - **Visibility:** Public - **Software:** Arduino, Bare metal - **Target Use Cases:** IoT audio playback/notification node with LTE backhaul, WiFi/Bluetooth connectivity, and remote power/health monitoring. - **ERC Status:** Latest ERC review fetched; see Reviews panel for current ERC/DRC findings. - **License:** https://creativecommons.org/licenses/by/4.0/ - **Power Architecture Notes:** Single-cell Li-ion via BQ24075 charger/power-path, load switch TPS22918 for switched rail, buck TPS62162 for 3V3_MAIN. Rails: SYS_RAW, SYS_SW, 3V3_MAIN, BATT+. USB-C bus-powered and/or battery-powered operation. - **Reference Design URL:** https://github.com/theonlydo2/awful-cyan-lightcycle - **Domain:** Consumer Electronics - **Manufacturing Quantity Target:** 10 - **System Architecture:** graph TD PWR["Power Subsystem\n(BQ24075, TPS22918, TPS62162, passives)"] USB["USB-C & ESD\n(TYPE-C-31-M-12, TPD4E05U06)"] MCU["MCU Core\n(ESP32-WROOM-32D, pogo pads, status LED)"] AUDIO["Audio Subsystem\n(DFPlayer DFR0299, TPA2011D1, speaker)"] LTE["LTE / Cellular Subsystem\n(SIM7500E, nano-SIM, U.FL + pi-match)"] TEST["Test & Sensing\n(VBAT_SENSE divider, rail TPs, pogo/debug)"] USB -->|VBUS_5V| PWR PWR -->|SYS_RAW, SYS_SW, 3V3_MAIN, BATT+| MCU PWR -->|3V3_MAIN / SYS rails| AUDIO PWR -->|VBAT / SYS rails| LTE MCU -->|UART / GPIO / control| AUDIO MCU -->|UART / control / status| LTE MCU -->|EN, IO0, TX0, RX0| TEST TEST -->|VBAT_SENSE, rail probes| MCU TEST -->|Rail access TPs| PWR - **Power Requirements:** USB, Battery - **Major ICs:** ESP32-WROOM-32D MCU module, SIM7500E LTE modem, DFR0299 DFPlayer audio module, TPA2011D1 class-D amplifier, BQ24075 charger, TPS22918 load switch, TPS62162 buck regulator, TYPE-C-31-M-12 USB-C receptacle, TPD4E05U06 and SRDA3.3-6.TBT ESD protection. - **Human Interface:** Buttons, LEDs - **Connectivity:** WiFi, Bluetooth, Cellular, USB ## Key Components ### D1 — [TPD4E05U06DQAR](https://www.flux.ai/jharwinflux/tpd4e05u06dqar~rl.md) - Manufacturer Part Number: TPD4E05U06DQAR - Part Type: Diode - Manufacturer Name: Texas Instruments Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/lit/ds/symlink/tpd4e05u06.pdf **Pins:** - D1- [pin 2] - D1+ [pin 1] - D2- [pin 5] - D2+ [pin 4] - GND_1 [pin 3] - GND_2 [pin 8] - NC_1 [pin 6] - NC_2 [pin 7] - NC_3 [pin 9] - NC_4 [pin 10] ### IC1 — [B2B-PH-SM4-TB](https://www.flux.ai/vasyl/b2b-ph-sm4-tb~ly.md) - Datasheet URL: https://www.snapeda.com/parts/B2B-PH-SM4-TB(LF)(SN)/JST%20Sales/datasheet/ - Part Type: Connector - Manufacturer Part Number: B2B-PH-SM4-TB - Manufacturer Name: JST **Pins:** - 1 - 2 ### IC3 — [TPS62162QDSGRQ1](https://www.flux.ai/adrian95/tps62162qdsgrq1~y7t.md) - Package or Case Code: SON50P200X200X80-9N - Manufacturer Name: Texas Instruments - Manufacturer Part Number: TPS62162QDSGRQ1 - Part Type: Power Management - Datasheet URL: http://www.ti.com/lit/gpn/tps62162-q1 - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - AGND [pin 4] - EN [pin 3] - EP [pin 9] - FB [pin 5] - PG [pin 8] - PGND [pin 1] - SW [pin 7] - VIN [pin 2] - VOS [pin 6] ### J1 — [TYPE-C-31-M-12](https://www.flux.ai/vasy_skral/type-c-31-m-12~75f.md) - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: Parametric - Part Type: Connector - Datasheet URL: https://en.krhro.com/npublic/opdfjs/web/viewer.html?file=https%3A%2F%2Fomo-oss-file.thefastfile.com%2Fportal-saas%2Fnew2023011311465142457%2Fcms%2Ffile%2F95f41c83-14fa-41cb-9f86-8d6a717317e5.pdf - Manufacturer Part Number: TYPE-C-31-M-12 - Manufacturer Name: Korean Hroparts Elec **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin B1A12] - GND [pin A1B12] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD [pin S3] - SHIELD [pin S1] - SHIELD [pin S4] - SHIELD [pin S2] - VBUS [pin B4A9] - VBUS [pin A4B9] ### J2 — [SMN-305](https://www.flux.ai/lcsc/smn-305~snw1.md) - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2012311032_XUNPU-SMN-305_C266890.pdf - Package or Case Code: SIM-SMD_SMN-305 - Role: Connector - Part Type: SIM Card Connectors - Connector Gender: Female - LCSC Part Number: C266890 - Role Details: Nano SIM Card Holder - Connector Pitch: 2.54mm - Connector Type: Card Slot - Manufacturer Part Number: SMN-305 - Product Info Url: https://lcsc.com/product-detail/Connector-Card-Sockets_XUNPU-SMN-305_C266890.html - Manufacturer Name: XUNPU(讯普) **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] ### J3 — [U.FL-R-SMT-1(10)](https://www.flux.ai/jecstronic/upfl-r-smt-110~du.md) - Role: Connector - Role Details: RF U.FL Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Hirose Electric Co Ltd - Part Type: Connector - Manufacturer Part Number: U.FL-R-SMT-1(10) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Hirose%20PDFs/EDC3-302540-10.tif.pdf **Pins:** - Center_Contact [pin 2] - Outer_Contact [pin 1] - Outer_Contact [pin 3] ### J4 — [YZ00515045R-07](https://www.flux.ai/lcsc/yz00515045r-07~q4vf.md) - Role: Connector - Part Type: Pogo Pin Spring Probe Connector - Package or Case Code: TESTPOINT-SMD_BD2.0-H7.0 - JLCPCB Part Class: Extended Part - Manufacturer Name: Xinyangze(鑫扬泽) - Manufacturer Part Number: YZ00515045R-07 - Role Details: Pogo Pin Test Interface - LCSC Part Number: C3001868 **Pins:** - 1 [pin 1] ### LED1 — [APD3224SURCK-F01](https://www.flux.ai/jecstronic/apd3224surck-f01~ly0.md) - Role Details: Status Indicator for ESP32 - Manufacturer Part Number: APD3224SURCK-F01 - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/APD3224SURCK-F01.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: LED - Part Type: LED - Forward Voltage: 1.95V - Manufacturer Name: Kingbright **Pins:** - A [pin 2] - K [pin 1] ### TP1 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Manufacturer Part Number: 5019 - Manufacturer Name: Keystone Electronics - Role: Test Point - Package or Case Code: 5019 - Part Type: Test Point - Role Details: Probing key nets - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 **Pins:** - 1 [pin 1] ### TP10 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Manufacturer Part Number: 5019 - Role Details: Test point for net SYS_SW - Role: Test Point - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Keystone Electronics - Package or Case Code: 5019 - Part Type: Test Point **Pins:** - 1 [pin 1] ### TP11 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Part Type: Test Point - Package or Case Code: 5019 - Manufacturer Name: Keystone Electronics - Role: Test Point - Manufacturer Part Number: 5019 - Role Details: Test point for net BATT+ **Pins:** - 1 [pin 1] ### TP12 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Package or Case Code: 5019 - Role: Test Point - Role Details: Test point for net 3V3_MAIN - Part Type: Test Point - Manufacturer Name: Keystone Electronics - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Manufacturer Part Number: 5019 **Pins:** - 1 [pin 1] ### TP13 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Role: Test Point - Manufacturer Part Number: 5019 - Role Details: Test point for net GND - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Manufacturer Name: Keystone Electronics - Package or Case Code: 5019 - Part Type: Test Point **Pins:** - 1 [pin 1] ### TP2 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Role: Test Point - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Part Type: Test Point - Package or Case Code: 5019 - Manufacturer Name: Keystone Electronics - Manufacturer Part Number: 5019 - Role Details: Probing key nets **Pins:** - 1 [pin 1] ### TP3 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Manufacturer Part Number: 5019 - Role Details: Probing key nets - Role: Test Point - Part Type: Test Point - Package or Case Code: 5019 - Manufacturer Name: Keystone Electronics - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] ### TP4 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Role Details: Probing key nets - Package or Case Code: 5019 - Part Type: Test Point - Manufacturer Name: Keystone Electronics - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Manufacturer Part Number: 5019 - Role: Test Point **Pins:** - 1 [pin 1] ### TP5 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Manufacturer Part Number: 5019 - Manufacturer Name: Keystone Electronics - Part Type: Test Point - Package or Case Code: 5019 - Role: Test Point - Role Details: Probing key nets - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 **Pins:** - 1 [pin 1] ### TP6 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Part Type: Test Point - Package or Case Code: 5019 - Manufacturer Name: Keystone Electronics - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Role Details: Probing key nets - Manufacturer Part Number: 5019 - Role: Test Point **Pins:** - 1 [pin 1] ### TP7 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Role Details: VBAT_SENSE voltage measurement - Manufacturer Name: Keystone Electronics - Part Type: Test Point - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 5019 - Package: 5019 - Package or Case Code: 5019 - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - Role: Test Point **Pins:** - 1 [pin 1] ### TP8 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Role: Test Point - Manufacturer Part Number: 5019 - Package or Case Code: 5019 - Part Type: Test Point - Role Details: Test point for net VBUS_5V - Manufacturer Name: Keystone Electronics - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] ### TP9 — [5019](https://www.flux.ai/adrian95/5019~fxh.md) - Part Type: Test Point - Package or Case Code: 5019 - Manufacturer Name: Keystone Electronics - Datasheet URL: https://www.keyelco.com/product-pdf.cfm?p=1357 - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Test point for net SYS_RAW - Manufacturer Part Number: 5019 - Role: Test Point **Pins:** - 1 [pin 1] ### U1 — [BQ24075RGTT](https://www.flux.ai/jecstronic/bq24075rgtt~lrh.md) - Manufacturer Part Number: BQ24075RGTT - Role: Power Management - Role Details: Li-ion charger and power-path management IC - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq24075.pdf - Part Type: Power Management - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments **Pins:** - ~CE [pin 4] - ~CHG [pin 9] - ~PGOOD [pin 7] - BAT_1 [pin 2] - BAT_2 [pin 3] - EN1 [pin 6] - EN2 [pin 5] - ILIM [pin 12] - IN [pin 13] - ISET [pin 16] - OUT_1 [pin 10] - OUT_2 [pin 11] - SYSOFF [pin 15] - TMR [pin 14] - TS [pin 1] - VSS [pin 8] - VSS_THERMAL_PAD [pin 17] ### U1 — [BQ24075RGTT](https://www.flux.ai/jecstronic/bq24075rgtt~lrh.md) - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq24075.pdf - Part Type: Power Management - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments - Manufacturer Part Number: BQ24075RGTT **Pins:** - ~CE [pin 4] - ~CHG [pin 9] - ~PGOOD [pin 7] - BAT_1 [pin 2] - BAT_2 [pin 3] - EN1 [pin 6] - EN2 [pin 5] - ILIM [pin 12] - IN [pin 13] - ISET [pin 16] - OUT_1 [pin 10] - OUT_2 [pin 11] - SYSOFF [pin 15] - TMR [pin 14] - TS [pin 1] - VSS [pin 8] - VSS_THERMAL_PAD [pin 17] ### U10 — [YZ00515045R-07](https://www.flux.ai/lcsc/yz00515045r-07~q4vf.md) - LCSC Part Number: C3001868 - Role: Connector - Manufacturer Part Number: YZ00515045R-07 - Manufacturer Name: Xinyangze(鑫扬泽) - JLCPCB Part Class: Extended Part - Part Type: Pogo Pin Spring Probe Connector - Package or Case Code: TESTPOINT-SMD_BD2.0-H7.0 - Role Details: Pogo pad debug interface for nets 3V3, GND, EN, IO0, TX0, RX0 **Pins:** - 1 [pin 1] ### U11 — [YZ00515045R-07](https://www.flux.ai/lcsc/yz00515045r-07~q4vf.md) - Part Type: Pogo Pin Spring Probe Connector - Package or Case Code: TESTPOINT-SMD_BD2.0-H7.0 - JLCPCB Part Class: Extended Part - LCSC Part Number: C3001868 - Role: Connector - Manufacturer Name: Xinyangze(鑫扬泽) - Role Details: Pogo pad debug interface for nets 3V3, GND, EN, IO0, TX0, RX0 - Manufacturer Part Number: YZ00515045R-07 **Pins:** - 1 [pin 1] ### U12 — [YZ00515045R-07](https://www.flux.ai/lcsc/yz00515045r-07~q4vf.md) - LCSC Part Number: C3001868 - Role Details: Pogo pad debug interface for nets 3V3, GND, EN, IO0, TX0, RX0 - Manufacturer Part Number: YZ00515045R-07 - Manufacturer Name: Xinyangze(鑫扬泽) - Part Type: Pogo Pin Spring Probe Connector - Package or Case Code: TESTPOINT-SMD_BD2.0-H7.0 - JLCPCB Part Class: Extended Part - Role: Connector **Pins:** - 1 [pin 1] ### U13 — [SRDA3.3-6.TBT](https://www.flux.ai/baueralex174/srda3p3-6ptbt~pu.md) - Part Type: SRDA3.3-6.TBT - Manufacturer Name: Semtech Corporation - Package or Case Code: SOIC127P600X170-9N - Role Details: SIM interface ESD protection for SIM_DATA, SIM_CLK, SIM_RST, SIM_VCC - Manufacturer Part Number: SRDA3.3-6.TBT - Compliance: Pb-Free,Halogen Free,RoHS/WEEE Compliant - License: https://creativecommons.org/licenses/by/4.0/ - Role: Protection - 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] ### U2 — [TPS22918DBVT](https://www.flux.ai/lcsc/tps22918dbvt~px0b.md) - JLCPCB Part Class: Extended Part - LCSC Part Number: C2680345 - Manufacturer Part Number: TPS22918DBVT - Role: Switching - Part Type: Power Distribution Switches - Role Details: Load switch for SYS_SW rail - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR - Manufacturer Name: TI(德州仪器) **Pins:** - CT [pin 4] - GND [pin 2] - ON [pin 3] - QOD [pin 5] - VIN [pin 1] - VOUT [pin 6] ### U2 — [TPS22918DBVT](https://www.flux.ai/lcsc/tps22918dbvt~px0b.md) - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR - Part Type: Power Distribution Switches - Manufacturer Name: TI(德州仪器) - JLCPCB Part Class: Extended Part - LCSC Part Number: C2680345 - Manufacturer Part Number: TPS22918DBVT **Pins:** - CT [pin 4] - GND [pin 2] - ON [pin 3] - QOD [pin 5] - VIN [pin 1] - VOUT [pin 6] ### U3 — [ESP32-WROOM-32D](https://www.flux.ai/vasyl/esp32-wroom-32d~7py.md) - Manufacturer Name: Espressif Systems - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Microcontroller - Manufacturer Part Number: ESP32-WROOM-32D - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf **Pins:** - 3.3V [pin 2] - AGND [pin 39] - CLK [pin 20] - CMD [pin 19] - EN [pin 3] - GND [pin 38] - GND [pin 15] - GND [pin 1] - 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 32] - RXD0 [pin 34] - SD0 [pin 21] - SD1 [pin 22] - SD2 [pin 17] - SD3 [pin 18] - TXD0 [pin 35] - VN [pin 5] - VP [pin 4] ### U3 — [ESP32-WROOM-32D](https://www.flux.ai/vasyl/esp32-wroom-32d~7py.md) - Manufacturer Name: Espressif Systems - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf - Manufacturer Part Number: ESP32-WROOM-32D - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Microcontroller - Role: Main MCU **Pins:** - 3.3V [pin 2] - AGND [pin 39] - CLK [pin 20] - CMD [pin 19] - EN [pin 3] - GND [pin 38] - GND [pin 15] - GND [pin 1] - 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 32] - RXD0 [pin 34] - SD0 [pin 21] - SD1 [pin 22] - SD2 [pin 17] - SD3 [pin 18] - TXD0 [pin 35] - VN [pin 5] - VP [pin 4] ### U4 — [SIM7500E](https://www.flux.ai/lcsc/sim7500e~d8.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1804162215_SIMCom-Wireless-Solutions-SIM7500E_C126259.pdf - Part Type: 2G/3G/4G/5G Modules - Manufacturer Part Number: SIM7500E - JLCPCB Part Class: Extended Part - Package or Case Code: GSM-SMD_56P-L27.0-W24.0-P1.50-TL - Product Info Url: https://lcsc.com/product-detail/GSM-GPRS-GPS-Modules_SIM7500E_C126259.html - Manufacturer Name: SIMCOM(芯讯通无线科技) - LCSC Part Number: C126259 **Pins:** - ADC [pin 25] - CTS [pin 41] - DBG_TXD [pin 51] - DCD [pin 37] - DIV_ANT [pin 2] - DTR [pin 40] - FLIGHTMODE [pin 49] - GND [pin 35] - GND [pin 28] - GND [pin 53] - GND [pin 6] - GND [pin 3] - GND [pin 29] - GND [pin 54] - GND [pin 47] - GND [pin 31] - GND [pin 44] - GND [pin 43] - GND [pin 56] - GND [pin 32] - GND [pin 1] - GND [pin 16] - GND [pin 15] - GND [pin 22] - GND [pin 46] - GNSS_ANT [pin 55] - GPIO10 [pin 26] - GPIO37 [pin 48] - I2S_MCLK [pin 17] - ISINK [pin 27] - L11_1V8 [pin 23] - MAIN_ANT [pin 45] - NETLIGHT [pin 52] - PCM_CLK [pin 18] - PCM_IN [pin 20] - PCM_OUT [pin 21] - PCM_SYNC [pin 19] - PWRKEY [pin 30] - RESET [pin 24] - RI [pin 42] - RTS [pin 36] - RXD [pin 39] - SCL [pin 4] - SDA [pin 5] - SIM_CLK [pin 11] - SIM_DATA [pin 10] - SIM_DET [pin 12] - SIM_RST [pin 13] - SIM_VDD [pin 14] - STATUS [pin 50] - TXD [pin 38] - USB_DM [pin 7] - USB_DP [pin 8] - VBAT [pin 33] - VBAT [pin 34] - VBUS [pin 9] ### U4 — [SIM7500E](https://www.flux.ai/lcsc/sim7500e~d8.md) - Package or Case Code: GSM-SMD_56P-L27.0-W24.0-P1.50-TL - LCSC Part Number: C126259 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1804162215_SIMCom-Wireless-Solutions-SIM7500E_C126259.pdf - JLCPCB Part Class: Extended Part - Role: Modulation / Demodulation - Product Info Url: https://lcsc.com/product-detail/GSM-GPRS-GPS-Modules_SIM7500E_C126259.html - Manufacturer Name: SIMCOM(芯讯通无线科技) - Role Details: LTE cellular modem for IoT backhaul - Part Type: 2G/3G/4G/5G Modules - Manufacturer Part Number: SIM7500E **Pins:** - ADC [pin 25] - CTS [pin 41] - DBG_TXD [pin 51] - DCD [pin 37] - DIV_ANT [pin 2] - DTR [pin 40] - FLIGHTMODE [pin 49] - GND [pin 35] - GND [pin 28] - GND [pin 53] - GND [pin 6] - GND [pin 3] - GND [pin 29] - GND [pin 54] - GND [pin 47] - GND [pin 31] - GND [pin 44] - GND [pin 43] - GND [pin 56] - GND [pin 32] - GND [pin 1] - GND [pin 16] - GND [pin 15] - GND [pin 22] - GND [pin 46] - GNSS_ANT [pin 55] - GPIO10 [pin 26] - GPIO37 [pin 48] - I2S_MCLK [pin 17] - ISINK [pin 27] - L11_1V8 [pin 23] - MAIN_ANT [pin 45] - NETLIGHT [pin 52] - PCM_CLK [pin 18] - PCM_IN [pin 20] - PCM_OUT [pin 21] - PCM_SYNC [pin 19] - PWRKEY [pin 30] - RESET [pin 24] - RI [pin 42] - RTS [pin 36] - RXD [pin 39] - SCL [pin 4] - SDA [pin 5] - SIM_CLK [pin 11] - SIM_DATA [pin 10] - SIM_DET [pin 12] - SIM_RST [pin 13] - SIM_VDD [pin 14] - STATUS [pin 50] - TXD [pin 38] - USB_DM [pin 7] - USB_DP [pin 8] - VBAT [pin 33] - VBAT [pin 34] - VBUS [pin 9] ### U5 — [DFR0299 - 8673144](https://www.flux.ai/jwace81/dfr0299-8673144~dl.md) - Manufacturer Name: DFRobot - Manufacturer Part Number: DFR0299 - Role: Audio Module - Datasheet URL: https://github.com/Arduinolibrary/DFPlayer_Mini_mp3/raw/master/DFPlayer%20Mini%20Manual.pdf - Role Details: MP3 Player Module **Pins:** - ADKEY1 [pin 12] - ADKEY2 [pin 13] - BUSY [pin 16] - DAC_L [pin 5] - DAC_R [pin 4] - GND [pin 10] - GND [pin 7] - IO1 [pin 9] - IO2 [pin 11] - RX [pin 2] - SPK1 [pin 6] - SPK2 [pin 8] - TX [pin 3] - USB- [pin 15] - USB+ [pin 14] - VCC [pin 1] ### U5 — [DFR0299 - 8673144](https://www.flux.ai/jwace81/dfr0299-8673144~dl.md) - Datasheet URL: https://github.com/Arduinolibrary/DFPlayer_Mini_mp3/raw/master/DFPlayer%20Mini%20Manual.pdf - Manufacturer Part Number: DFR0299 - Role: Audio Module - Role Details: MP3 Player Module - Manufacturer Name: DFRobot **Pins:** - ADKEY1 [pin 12] - ADKEY2 [pin 13] - BUSY [pin 16] - DAC_L [pin 5] - DAC_R [pin 4] - GND [pin 10] - GND [pin 7] - IO1 [pin 9] - IO2 [pin 11] - RX [pin 2] - SPK1 [pin 6] - SPK2 [pin 8] - TX [pin 3] - USB- [pin 15] - USB+ [pin 14] - VCC [pin 1] ### U6 — [TPA2011D1YFFT](https://www.flux.ai/jecstronic/tpa2011d1yfft~27.md) - Role Details: Class-D Amplifier - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Manufacturer Part Number: TPA2011D1YFFT - Manufacturer Name: Texas Instruments - Role: Amplification - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftpa2011d1 **Pins:** - EN [pin C2] - GND [pin A2] - IN- [pin C1] - IN+ [pin A1] - PGND [pin B3] - PVDD [pin B2] - VDD [pin B1] - VO- [pin A3] - VO+ [pin C3] ### U6 — [TPA2011D1YFFT](https://www.flux.ai/jecstronic/tpa2011d1yfft~27.md) - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftpa2011d1 - Manufacturer Name: Texas Instruments - Manufacturer Part Number: TPA2011D1YFFT - Role: Amplification - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Role Details: Class-D Amplifier **Pins:** - EN [pin C2] - GND [pin A2] - IN- [pin C1] - IN+ [pin A1] - PGND [pin B3] - PVDD [pin B2] - VDD [pin B1] - VO- [pin A3] - VO+ [pin C3] ### U7 — [YZ00515045R-07](https://www.flux.ai/lcsc/yz00515045r-07~q4vf.md) - Manufacturer Part Number: YZ00515045R-07 - Manufacturer Name: Xinyangze(鑫扬泽) - LCSC Part Number: C3001868 - Role Details: Pogo pad debug interface for nets 3V3, GND, EN, IO0, TX0, RX0 - Role: Connector - JLCPCB Part Class: Extended Part - Part Type: Pogo Pin Spring Probe Connector - Package or Case Code: TESTPOINT-SMD_BD2.0-H7.0 **Pins:** - 1 [pin 1] ### U8 — [YZ00515045R-07](https://www.flux.ai/lcsc/yz00515045r-07~q4vf.md) - JLCPCB Part Class: Extended Part - Package or Case Code: TESTPOINT-SMD_BD2.0-H7.0 - Part Type: Pogo Pin Spring Probe Connector - Role: Connector - Manufacturer Part Number: YZ00515045R-07 - Manufacturer Name: Xinyangze(鑫扬泽) - Role Details: Pogo pad debug interface for nets 3V3, GND, EN, IO0, TX0, RX0 - LCSC Part Number: C3001868 **Pins:** - 1 [pin 1] ### U9 — [YZ00515045R-07](https://www.flux.ai/lcsc/yz00515045r-07~q4vf.md) - Manufacturer Name: Xinyangze(鑫扬泽) - Role Details: Pogo pad debug interface for nets 3V3, GND, EN, IO0, TX0, RX0 - Manufacturer Part Number: YZ00515045R-07 - LCSC Part Number: C3001868 - JLCPCB Part Class: Extended Part - Package or Case Code: TESTPOINT-SMD_BD2.0-H7.0 - Part Type: Pogo Pin Spring Probe Connector - Role: Connector **Pins:** - 1 [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/theonlydo2/awful-cyan-lightcycle~5r](https://www.flux.ai/theonlydo2/awful-cyan-lightcycle~5r).* --- *Generated from [https://www.flux.ai/theonlydo2/awful-cyan-lightcycle~5r](https://www.flux.ai/theonlydo2/awful-cyan-lightcycle~5r)*