# AvocAudio: v3\.2 \- Root

## Description

AvocAudio is a compact tinyML community board designed for extensive audio data collection for various tinyML  applications\. It leverages the Raspberry Pi RP2040 and integrates a LoRa\-E5 LoRaWAN Transceiver Module for connectivity\. Equipped with an SD card slot for local data storage, the board ensures efficient data collection\. The board operates on solar power or a lithium\-ion battery, ensuring flexible and efficient energy use\. \#raspberryPi \#rp2040 \#lorawan \#iot \#solar 

## Project Details

- **Owner:** collinsemasi
- **Created:** 3/23/2025
- **Last Updated:** 9/30/2026
- **Visibility:** Public
- **License:** https://creativecommons\.org/licenses/by/4\.0/
- **Operating Voltage:** 3\.3
- **Domain:** Scientific
- **Data Storage:** SD Card
- **Compliance:** RoHS
- **Human Interface:** Buttons
- **Sensor Interface:** Microphone, Temperature sensor, Humidity sensor
- **Data type:** Audio
- **Connectivity:** LoRaWAN
- **Stars:** 1
- **Copies:** 33

## Key Components

### D1 — [PMEG3020EGWJ](https://flux.ai/lcsc/pmeg3020egwj~7z7h.md)

- Part Type: Schottky Barrier Diodes \(SBD\)
- Package or Case Code: SOD\-123\_L2\.8\-W1\.8\-LS3\.7\-RD
- Manufacturer Part Number: PMEG3020EGWJ
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2410010202\_Nexperia\-PMEG3020EGWJ\_C552875\.pdf
- Manufacturer Name: Nexperia\(安世\)
- Product Info Url: https://lcsc\.com/product\-detail/presales\_Nexperia\-PMEG3020EGWJ\_C552875\.html
- Functional Group: IO J3 Micro USB
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C552875

**Pins:**
- A [pin 2]
- C [pin 1]

### D2 — [LED\_0603\_1608Metric](https://flux.ai/adrian95/led06031608metric~990.md)

- Forward Voltage: 2\.0V
- Manufacturer Name: Foshan NationStar Optoelectronics
- Part Type: LED
- Color: Green
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://datasheet\.lcsc\.com/lcsc/2008201032\_Foshan\-NationStar\-Optoelectronics\-NCD0603C1\_C84264\.pdf
- Manufacturer Part Number: NCD0603C1
- Functional Group: MCU U1 Main Controller
- Forward Current: 20mA

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### D3 — [LED\_0603\_1608Metric](https://flux.ai/adrian95/led06031608metric~990.md)

- Forward Voltage: 2\.0V
- Manufacturer Name: Foshan NationStar Optoelectronics
- Functional Group: IO J5 Solar Input
- Part Type: LED
- Color: Green
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://datasheet\.lcsc\.com/lcsc/2008201032\_Foshan\-NationStar\-Optoelectronics\-NCD0603C1\_C84264\.pdf
- Manufacturer Part Number: NCD0603C1
- Forward Current: 20mA

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### D4 — [LED\_0603\_1608Metric](https://flux.ai/adrian95/led06031608metric~990.md)

- Current: 20mA
- Manufacturer Name: Foshan NationStar Optoelectronics
- Part Type: LED
- Color: Red
- Manufacturer Part Number: NCD0603R1
- Datasheet URL: https://datasheet\.lcsc\.com/lcsc/2008201032\_Foshan\-NationStar\-Optoelectronics\-NCD0603R1\_C84263\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/
- Forward Voltage: 2\.0V
- Functional Group: POWER U5 Li\-Ion Charger

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### D5 — [LED\_0603\_1608Metric](https://flux.ai/adrian95/led06031608metric~990.md)

- Functional Group: POWER U5 Li\-Ion Charger
- Forward Voltage: 2\.0V
- Manufacturer Name: Foshan NationStar Optoelectronics
- Part Type: LED
- Color: Green
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://datasheet\.lcsc\.com/lcsc/2008201032\_Foshan\-NationStar\-Optoelectronics\-NCD0603C1\_C84264\.pdf
- Manufacturer Part Number: NCD0603C1
- Forward Current: 20mA

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### D6 — [LED\_0603\_1608Metric](https://flux.ai/adrian95/led06031608metric~990.md)

- Forward Voltage: 2\.0V
- Manufacturer Name: Foshan NationStar Optoelectronics
- Part Type: LED
- Color: Green
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://datasheet\.lcsc\.com/lcsc/2008201032\_Foshan\-NationStar\-Optoelectronics\-NCD0603C1\_C84264\.pdf
- Functional Group: IO J3 Micro USB
- Manufacturer Part Number: NCD0603C1
- Forward Current: 20mA

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### D7 — [LED\_0603\_1608Metric](https://flux.ai/adrian95/led06031608metric~990.md)

- Forward Voltage: 2\.0V
- Manufacturer Name: Foshan NationStar Optoelectronics
- Part Type: LED
- Color: Green
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://datasheet\.lcsc\.com/lcsc/2008201032\_Foshan\-NationStar\-Optoelectronics\-NCD0603C1\_C84264\.pdf
- Manufacturer Part Number: NCD0603C1
- Functional Group: IO J2 Battery Connector
- Forward Current: 20mA

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### J1 — [1140084168](https://flux.ai/collinsemasi/1140084168~wa.md)

- Part Type: Connector
- Datasheet URL: https://mm\.digikey\.com/Volume0/opasdata/d220001/medias/docus/1139/114\-00841\-68\.pdf
- Manufacturer Part Number: 114\-00841\-68
- Manufacturer Name: Amphenol ICC \(Commercial Products\)
- Insertion/Removal method: Push In, Pull Out
- Card Type: Secure Digital \- microSD™
- Number of positions: 10 \(8 \+ 2\)
- Functional Group: IO J1 microSD Storage
- Compliance: RoHS

**Pins:**
- S2 [pin S2]
- S4 [pin S4]
- S3 [pin S3]
- 1 [pin 1]
- 10 [pin 10]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]
- 5 [pin 5]
- 6 [pin 6]
- 7 [pin 7]
- 8 [pin 8]
- 9 [pin 9]
- SHIELD [pin S1]

### J2 — [JST B2B PH K 01x02 Connector](https://flux.ai/jharwinbarrozo/jst-b2b-ph-k-01x02-connector~zu5.md)

- Manufacturer Part Number: B2B\-PH\-K\-S\(LF\)\(SN\)
- Manufacturer Name: JST Sales America
- Functional Group: IO J2 Battery Connector
- Part Type: Connector
- Datasheet URL: https://www\.jst\-mfg\.com/product/pdf/eng/ePH\.pdf

**Pins:**
- PIN1 [pin 1]
- PIN2 [pin 2]

### J3 — [10118192\-0001LF](https://flux.ai/jecstronic/10118192-0001lf~agz.md)

- Manufacturer Part Number: 10118192\-0001LF
- Part Type: USB B
- Datasheet URL: https://cdn\.amphenol\-cs\.com/media/wysiwyg/files/documentation/datasheet/inputoutput/io\_usb\_micro\.pdf
- Manufacturer Name: Amphenol ICC \(FCI\)
- Functional Group: IO J3 Micro USB
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- D\- [pin 2]
- D\+ [pin 3]
- GND [pin 5]
- ID [pin 4]
- SHIELD [pin SH1]
- SHIELD [pin SH4]
- SHIELD [pin SH2]
- SHIELD [pin SH3]
- SHIELD [pin SH6]
- SHIELD [pin SH5]
- VUSB [pin 1]

### J4 — [IPEX1](https://flux.ai/collinsemasi/ipex1~7o.md)

- Frequency Max: 6GHz
- Number of Ports: 1
- Impedance: 50Ω
- Interface Diameter: 2mm
- RF Series: IPEX
- Functional Group: RF U6 LoRa Module
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: BWU\.FL\-IPEX1
- Interface Length: 1\.25mm
- Datasheet URL: https://datasheet\.lcsc\.com/lcsc/2208151830\_BAT\-WIRELESS\-BWU\-FL\-IPEX1\_C5137195\.pdf
- Manufacturer Name: BAT WIRELESS
- Part Type: Connector

**Pins:**
- GND [pin 1]
- GND [pin 3]
- SIGNAL [pin 2]

### J5 — [OSTVN02A150](https://flux.ai/collinsemasi/ostvn02a150~fy.md)

- Manufacturer Name: Cixi Kefa Elec
- Datasheet URL: https://jlcpcb\.com/api/file/downloadByFileSystemAccessId/8588888675048697856?\_gl=1\*16cxxcw\*\_gcl\_au\*MTgyODk0NzY4MS4xNzQyODIxMTkxLjE1MDA0MDg5ODguMTc0MjgyMjMxOS4xNzQyODIzMjA4\*\_ga\*NDQ2NjgwODgwLjE3NDI4MjExOTE\.\*\_ga\_BZ8D96C9TK\*MTc0MjgyMTIyNC4xLjEuMTc0MjgyMjMxOC42MC4wLjA\.\*\_ga\_VB33MLCQS2\*MTc0MjgyMTIyNC4xLjEuMTc0MjgyMjMxOC42MC4wLjA\.
- Manufacturer Part Number: KF128\-2\.54\-2P
- Functional Group: IO J5 Solar Input
- Manufacturer Part Number: OSTVN02A150

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J6 — [B4B\-PH\-K\-S \(LF\)\(SN\)](https://flux.ai/jecstronic/b4b-ph-k-s-lfsn~r8.md)

- Interface: To interface DH11 or DH22
- Functional Group: IO J6 DHT Sensor
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Name: JST Sales America Inc\.
- Datasheet URL: https://www\.jst\-mfg\.com/product/pdf/eng/ePH\.pdf
- Manufacturer Part Number: B4B\-PH\-K\-S \(LF\)\(SN\)
- Part Type: Connector

**Pins:**
- PIN\_1 [pin 1]
- PIN\_2 [pin 2]
- PIN\_3 [pin 3]
- PIN\_4 [pin 4]

### J8 — [Pin Header 01x03 2\.54mm Vertical](https://flux.ai/adrian95/pin-header-01x03-254mm-vertical~cp4.md)

- Part Type: Connector
- Functional Group: IO J8 SWD Debug
- Manufacturer Name: Würth Elektronik
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: 61300311121

**Pins:**
- Pin\_1 [pin 1]
- Pin\_2 [pin 2]
- Pin\_3 [pin 3]

### MK3 — [ICS\-43434](https://flux.ai/jecstronic/ics-43434~9uz.md)

- Functional Group: SENSE MK3 Digital Microphone
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Microphone
- Datasheet URL: https://invensense\.tdk\.com/wp\-content/uploads/2016/02/DS\-000069\-ICS\-43434\-v1\.2\.pdf
- Manufacturer Part Number: ICS\-43434
- Manufacturer Name: TDK InvenSense

**Pins:**
- GND [pin 3]
- LR [pin 2]
- SCK [pin 4]
- SD [pin 6]
- VDD [pin 5]
- WS [pin 1]

### Q2 — [RU1C001ZPTL](https://flux.ai/lcsc/ru1c001zptl~rrra.md)

- Manufacturer Part Number: RU1C001ZPTL
- JLCPCB Part Class: Extended Part
- Manufacturer Name: ROHM\(罗姆\)
- Functional Group: IO J5 Solar Input
- LCSC Part Number: C510010
- Package or Case Code: SOT\-323\-3\_L2\.0\-W1\.3\-P1\.30\-LS2\.1\-BR

**Pins:**
- D [pin 3]
- G [pin 1]
- S [pin 2]

### SW1 — [Tactile Switch SPST\-NO PTS526 SK15 SMTR2 LFS](https://flux.ai/collinsemasi/tactile-switch-spst-no-pts526-sk15-smtr2-lfs~83.md)

- Manufacturer Part Number: PTS526 SK15 SMTR2 LFS
- Functional Group: MCU U1 Main Controller
- Manufacturer Name: C&K
- Datasheet URL: https://www\.ckswitches\.com/media/2780/pts526\.pdf
- Part Type: Switch

**Pins:**
- 4 [pin 4]
- 2 [pin 2]
- 1 [pin 1]
- 3 [pin 3]

### SW2 — [Tactile Switch SPST\-NO PTS526 SK15 SMTR2 LFS](https://flux.ai/collinsemasi/tactile-switch-spst-no-pts526-sk15-smtr2-lfs~83.md)

- Manufacturer Part Number: PTS526 SK15 SMTR2 LFS
- Functional Group: MCU U1 Main Controller
- Manufacturer Name: C&K
- Datasheet URL: https://www\.ckswitches\.com/media/2780/pts526\.pdf
- Part Type: Switch

**Pins:**
- 4 [pin 4]
- 2 [pin 2]
- 1 [pin 1]
- 3 [pin 3]

### U1 — [RP2040](https://flux.ai/vasy_skral/rp2040~kqt.md)

- Datasheet URL: https://datasheets\.raspberrypi\.com/rp2040/rp2040\-datasheet\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/
- Peripherals: Brown\-out Detect/Reset, DMA, I2S, LCD, POR, PWM, WDT
- Manufacturer Part Number: RP2040
- Hardware reference design URL: https://datasheets\.raspberrypi\.com/rp2040/hardware\-design\-with\-rp2040\.pdf
- Program memory type: External Program Memory
- Connectivity: I2C, IrDA, QSPI, SPI, UART/USART, USB
- Data Converters: A/D 4x12b SAR
- Voltage Supply \(Vcc/Vdd\): 1\.8V \~ 3\.3V
- Manufacturer Name: Raspberry Pi
- Core Processor: ARM® Cortex®\-M0\+
- Speed: 133M
- Functional Group: MCU U1 Main Controller
- Part Type: Microcontroller
- Operating Temperature: \-40°C \~ 85°C \(TC\)
- Compliance: RoHS
- Number of I/O: 30

**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 — [W25Q128JVSIQ](https://flux.ai/jecstronic/w25q128jvsiq~tqj.md)

- Memory Size: 128Mbit
- Memory Format: FLASH
- Write Cycle Time \- Word, page: 3ms
- Memory organization: 16M x 8
- Operating Voltage: 2\.7V \~ 3\.6V
- Memory Type: Non\-Volatile
- Memory Interface: SPI \- Quad I/O, QPI, DTR
- Operating Temperature: \-40°C \~ 85°C \(TA\)°C
- Manufacturer Name: Winbond Electronics
- Part Type: Integrated Circuit
- Functional Group: MCU U1 Main Controller
- Compliance: REACH
- Datasheet URL: https://datasheet\.lcsc\.com/lcsc/1811142111\_Winbond\-Elec\-W25Q128JVSIQ\_C97521\.pdf
- Clock Frequency: 133 MHz
- Technology: FLASH \- NOR
- Manufacturer Part Number: W25Q128JVSIQ

**Pins:**
- \~CS [pin 1]
- CLK [pin 6]
- DI\(IO0\) [pin 5]
- DO\(IO1\) [pin 2]
- GND [pin 4]
- IO2 [pin 3]
- IO3 [pin 7]
- VCC [pin 8]

### U3 — [SY6280](https://flux.ai/collinsemasi/sy6280~70.md)

- Manufacturer Name: Silergy Corp
- Functional Group: POWER U4 3V3 Supply
- Manufacturer Part Number: SY6280A  AC
- Datasheet URL: https://www\.lcsc\.com/datasheet/lcsc\_datasheet\_1810121532\_Silergy\-Corp\-SY6280AAC\_C55136\.pdf
- Package or Case Code: SOT\-23\-5
- Part Type: Integrated Circuit
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- EN [pin 4]
- GND [pin 2]
- ISET [pin 3]
- VIN [pin 5]
- VOUT [pin 1]

### U4 — [RT8059GJ5](https://flux.ai/collinsemasi/rt8059gj5~n5.md)

- Functional Group: POWER U4 3V3 Supply
- Manufacturer Part Number: RT8059GJ5
- Datasheet URL: https://www\.lcsc\.com/datasheet/lcsc\_datasheet\_1811100910\_Richtek\-Tech\-RT8059GJ5\_C20542\.pdf
- Package or Case Code: SOT\-23\-5
- Part Type: Integrated Circuit
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- EN [pin 1]
- FB [pin 5]
- GND [pin 2]
- LX [pin 3]
- VIN [pin 4]

### U5 — CN3063 Test

- Functional Group: POWER U5 Li\-Ion Charger
- Regulation voltage: Internally fixed at 4\.2V with 1% accuracy, adjustable with external resistor
- Compliance: REACH
- Battery compatibility: Single cell Li\-ion and Li Polymer rechargeable batteries
- Part Type: Complete constant\-current/constant voltage linear charger
- Manufacturer Name: Shanghai Consonance Elec
- Part Type: Integrated Circuit
- Additional Features: \- Undervoltage lockout \- Automatic recharge \- Battery temperature sensing \- Charging/termination indicator
- Manufacturer Part Number: CN3063
- On\-chip components: \- Power MOSFET \- 8\-bit ADC
- Package or Case Code: SOP\-8\-EP
- Datasheet URL: https://datasheet\.lcsc\.com/lcsc/1811051510\_ShangHai\-Consonance\-Elec\-CN3063\_C28078\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/
- Programmable charge current: Yes, programmable externally with a single resistor
- Low power mode: Automatically enters low power sleep mode \(\< 3uA battery drain\) when input supply is removed

**Pins:**
- 9 [pin 9]
- \~CHARG [pin 7]
- \~DONE [pin 6]
- BAT [pin 5]
- FB [pin 8]
- GND [pin 3]
- ISET [pin 2]
- TEMP [pin 1]
- VIN [pin 4]

### U6 — [LoRa\-E5 \(STM32WLE5JC\)](https://flux.ai/seeedstudio/wio-e5-stm32wle5jc~gl.md)

- Manufacturer Name: Seeed Technology Co\., Ltd
- Manufacturer Part Number: 317990687
- Datasheet URL: https://files\.seeedstudio\.com/products/317990687/res/LoRa\-E5%20module%20datasheet\_V1\.0\.pdf
- Functional Group: RF U6 LoRa Module
- Part Type: RF Transceiver Module

**Pins:**
- GND [pin 16]
- GND [pin 14]
- GND [pin 22]
- GND [pin 2]
- PA0 [pin 23]
- PA10 [pin 27]
- PA13 [pin 3]
- PA14 [pin 4]
- PA15 [pin 6]
- PA2 [pin 19]
- PA3 [pin 18]
- PA9 [pin 21]
- PB0 [pin 28]
- PB10 [pin 20]
- PB13 [pin 24]
- PB14 [pin 26]
- PB15 [pin 5]
- PB3 [pin 8]
- PB4 [pin 7]
- PB5 [pin 11]
- PB6 [pin 10]
- PB7 [pin 9]
- PB9 [pin 25]
- PC0 [pin 13]
- PC1 [pin 12]
- RFIO [pin 15]
- RST [pin 17]
- VCC [pin 1]

### Y1 — [CRYSTAL 12MHZ 18PF SMD FL1200112](https://flux.ai/collinsemasi/crystal-12mhz-18pf-smd-fl1200112~ce.md)

- Operating mode: Fundamental
- Functional Group: MCU U1 Main Controller
- Compliance: RoHS, REACH
- Load capacitance: 18pF
- Operating Temperature: \-40 \~ 85°C
- Manufacturer Part Number: ABM8\-272\-T3
- Datasheet URL: https://www\.lcsc\.com/datasheet/lcsc\_datasheet\_2410121909\_Abracon\-LLC\-ABM8\-272\-T3\_C20625731\.pdf
- Manufacturer Name: Abracon LLC
- ESR \(Equivalent Series Resistance\): 50Ohms
- Frequency Stability: ±30ppm
- Frequency: 12MHz

**Pins:**
- CASE\_1 [pin 2]
- CASE\_2 [pin 4]
- XTAL\_1 [pin 1]
- XTAL\_2 [pin 3]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/collinsemasi/avocaudio\-v3p2\-root\~xt](https://flux.ai/collinsemasi/avocaudio-v3p2-root~xt).*

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*Generated from [https://flux\.ai/collinsemasi/avocaudio\-v3p2\-root\~xt](https://flux.ai/collinsemasi/avocaudio-v3p2-root~xt)*