2 layers66.6 × 41.3 mm
UPIC46
emertcakir/uPIC46
PIC18F46K22-based versatile development board with CAN, RS-485, EEPROM, RTC, and user LEDs
111 parts2MIT
4 layers100 × 75 mm
OpenAirScope
emertcakir/OpenAirScope26Open-source air quality and environmental monitoring node with STM32H743 + ESP32-C3, LoRaWAN, RS485, USB-C, Li-ion charging, and multi-sensor support.
- Size
- 100 × 75 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 282
- Nets
- 239
- Pads
- 959
- Tracks, vias
- 1,775, 473
- Pours
- 408
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 10 Sep 2025
- Updated
- 14 Jun 2026
Overview
OpenAirScope is an open-source printed circuit board by emertcakir, from the emertcakir/OpenAirScope repository on GitHub, published under the MIT licence. It is a 4-layer board of 100 × 75 mm with 282 parts on 239 nets, routed with 1,775 tracks and 473 vias.
It is built around the ESP32-C3-WROOM-02-H4, MAX3485ED and MCP73871EV, with the SN65HVD230D, LTR-303ALS-01 and SCD40-D-R2 among its other parts. Its parts include 92 resistors, 89 capacitors, 16 diodes, 15 ICs and 13 connectors. It belongs with the interfaces and adapters and sensors and measurement boards and the ESP32, STM32 and RISC-V boards of this library.
Main components
12
ESP32-C3-WROOM-02-H4
SMD,20x18mm-105dBm -40℃~+105℃ 2.4GHz 20.5dBm 345mA 3V~3.6V 82mA Bluetooth5.0 ESP32-C3 On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,20x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
MAX3485ED
SOP-8-40℃~+85℃ 1 1 10Mbps 1mA 3.135V~3.465V 32 Half-Duplex Transceiver ±8kV SOP-8 RS-485 / RS-422 ICs ROHSHTC Korea TAEJIN TechRS-485 / RS-422 ICsMCP73871EV
-ModulesMicrochip Technology
SN65HVD230D
SOIC-8-40℃~+85℃ 1 17mA 1Mbps 370uA 3V~3.6V CAN Transceiver Low-power mode、Wake-up function、ESD protection、Thermal shutdown protection、Bus fault protection、Hot-swap protection SOIC-8 CAN Transceivers ROHSTexas InstrumentsCAN Transceivers
LTR-303ALS-01
DFN-6(2x2)-30℃~+70℃ 0.7mm 16bit 2.4V~3.6V 2mm 2mm 64klx I2C Light Intensity Low power/sleep mode、Spectral correction/filtering、Adjustable gain control、Interrupt/event trigger、Built-in temperature compensation DFN-6(2x2) Ambient Light Sensors ROHSLite-OnAmbient Light Sensors
SCD40-D-R2
LGA-20(10.1x10.1)-10℃~+60℃ 10.1mm 10.1mm 15mA 2.4V~5.5V 400ppm~2000ppm 6.5mm Air quality I2C Reset function ±5% LGA-20(10.1x10.1) Gas Sensors ROHSSensirionGas SensorsSGP41-D-R4
DFN-6(2.4x2.4)DFN-6(2.4x2.4) VOC Sensors ROHSSensirionVOC SensorsDS3231MZ+
SOIC-8-40℃~+85℃ 2.3V~5.5V I2C Temperature compensation、Backup power management and battery charging、Alarm function、Periodic interrupt output SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
LD39150DT33-R
DPAK-40℃~+125℃@(Tj) 1 1.5A 100uVrms 1mA 3.3V 55dB@(1kHz) 6V Fixed Over Current Protection、Over Temperature Protection、Enable Positive DPAK Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsM95256-WMN6P
SO-8-40℃~+85℃ 2.5V~5.5V 200 Years 20MHz 256Kbit 4,000,000 Cycles 5ms Hardware write protection function、Software write protection function、Built-in power-on reset (POR)、Built-in error correction code (ECC) function、Built-in write enable latch (WEL) SPI SO-8 EEPROM ROHSSTMicroelectronicsEEPROMRAK3172-SIP
LGA73_12X12mmLGA73_12X12mm New Arrivals ROHSRAKwirelessUncategorised
TPD2E2U06DCK
SC-70-3-40℃~+125℃ 1.5pF 10nA 12.4V 2 5.5A@8/20us 5.5V 6.5V 75W@8/20us Bidirectional IEC 61000-4-2、IEC 61000-4-5 TVS SC-70-3 ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)
README
README.mdEMC
OpenAirScope 🌍💨
OpenAirScope is an open-source hardware and software project designed for advanced environmental monitoring and air quality measurement. It is based on the STM32H743 and ESP32-C3, supports LoRaWAN, and is equipped with a wide range of up-to-date sensors and display options.
PCB 3D
Features
-
High-Performance MCU:
- STM32H743 (ARM Cortex-M7, 400 MHz)
- Capable of running advanced algorithms and real-time data processing
- Multiple communication interfaces (I²C, SPI, UART, CAN, USB, RS485)
-
Wireless Communication:
- ESP32-C3-WROOM-02 → Wi-Fi + Bluetooth LE
- RAK3172 (LoRaWAN) → Low-power, long-range wireless communication
- External SMA antenna connector (for LoRa)
-
Sensor Support (Optional/Modular):
- SGP41-D-R4 → Gas sensor (VOC and NOx measurement)
- SCD40-D-R2 → CO₂, temperature, and humidity sensor
- SPS30 → Particulate matter sensor (PM1.0, PM2.5, PM4, PM10)
- LTR-303ALS-01 (Optional) → Ambient light sensor
- SPH0645LM4H-B (2 units) → Digital MEMS microphone (ambient noise, sound level, acoustic analysis)
- Expandable design: additional sensors such as pressure or UV can be integrated
-
Display:
- 1.5-inch RGB OLED Display Module
- 65K RGB colors, 128×128 resolution
- SPI interface for fast graphics and real-time data visualization
-
Power Management:
- Li-Ion battery support
- USB-powered with simultaneous battery charging
- Suitable for both portable and stationary applications
-
Flexible Communication:
- USB-C interface
- RS485 (for industrial environments)
- CAN-Bus support
- IoT integration via Wi-Fi and LoRaWAN
-
Modular Design:
- Optional sensor add/remove capability
- External SMA antenna for long-range connectivity
- Developer-friendly accessible pinout
-
Software:
- STM32CubeIDE / PlatformIO support
- Open-source drivers and example libraries
- Example algorithms for air quality and environmental data evaluation
- OLED display example code for real-time visualization of sensor data
Use Cases
- Smart city solutions
- Industrial environment monitoring
- Indoor/outdoor air quality tracking
- Noise pollution and sound analysis
- Portable IoT devices with OLED display
- Long-range LoRaWAN field applications
- Research and education projects
Contributing
This project is open source. Contributions are welcome for new sensor support, software development, or documentation improvements. You can submit pull requests or open issues.
License
Released under the MIT License.
CRITICAL WARNING: This PCB design is currently an experimental, unverified prototype (AS-IS). I have not yet manufactured or functionally tested this version. Proceeding with production carries a high risk of failure and is undertaken solely at your own risk.
Parts
282| Qty | Value | Footprint | References |
|---|---|---|---|
| 39 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C14, C17, C22, C23, C24, C25, C26, C27, C28, C29, C30, C31, C32, C33, C34 +23 |
| 22 | 0R | Resistor_SMD:R_0603_1608Metric | R11, R14, R15, R16, R17, R18, R21, R22, R23, R24, R25, R26, R31, R34, R38, R39 +6 |
| 21 | 10k | Resistor_SMD:R_0603_1608Metric | R12, R13, R20, R27, R28, R29, R30, R33, R35, R36, R37, R41, R42, R43, R45, R46 +5 |
| 15 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP9, TP10, TP11, TP12, TP13, TP14, TP15, TP16 |
| 14 | 1uF | Capacitor_SMD:C_1206_3216Metric | C1, C5, C7, C21, C38, C50, C63, C68, C69, C70, C71, C73, C77, C82 |
| 14 | 4.7k | Resistor_SMD:R_0603_1608Metric | R52, R57, R58, R59, R60, R70, R71, R72, R73, R74, R75, R86, R87, R88 |
| 11 | 1k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R54, R64, R65, R66, R67, R68, R69 |
| 10 | Fiducial | Fiducial:Fiducial_1mm_Mask2mm | FID1, FID2, FID3, FID4, FID5, FID6, FID7, FID8, FID9, FID10 |
| 9 | LED | LED_SMD:LED_0603_1608Metric | D2, D3, D4, D9, D10, D11, D12, D13, D14 |
| 7 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C4, C6, C8, C12, C20, C48, C60 |
| 7 | BC817 | Package_TO_SOT_SMD:SOT-23 | Q1, Q3, Q4, Q5, Q6, Q7, Q8 |
| 6 | 22k | Resistor_SMD:R_0603_1608Metric | R82, R84, R89, R91, R92, R94 |
| 6 | 47k | Resistor_SMD:R_0603_1608Metric | R76, R77, R78, R79, R80, R81 |
| 5 | 10uF | Capacitor_SMD:C_1206_3216Metric | C3, C16, C19, C47, C57 |
| 5 | 1nF | Capacitor_SMD:C_0603_1608Metric | C37, C40, C84, C90, C92 |
| 4 | FerriteBead | Inductor_SMD:L_0603_1608Metric | FB1, FB2, FB3, FB4 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_ISO7380 | H1, H2, H3, H4 |
| 3 | 22nF | Capacitor_SMD:C_0603_1608Metric | C83, C89, C91 |
| 3 | Conn_01x08_Pin | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J4, J5, J14 |
| 3 | ESD9B3.3ST5G | Diode_SMD:D_SOD-923 | D15, D16, D17 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H13mm | SW3, SW4, SW5 |
| 2 | 100R | Resistor_SMD:R_0603_1608Metric | R6, R19 |
| 2 | 100pF | Capacitor_SMD:C_0603_1608Metric | C59, C62 |
| 2 | 10pF | Capacitor_SMD:C_0603_1608Metric | C45, C46 |
| 2 | 120R | Resistor_SMD:R_0603_1608Metric | R32, R40 |
| 2 | 2.2uF | Capacitor_SMD:C_1206_3216Metric | C43, C44 |
| 2 | 200pF | Capacitor_SMD:C_0603_1608Metric | C72, C74 |
| 2 | 22uF | Capacitor_SMD:C_1206_3216Metric | C15, C18 |
| 2 | 47pF | Capacitor_SMD:C_0603_1608Metric | C9, C10 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R7, R8 |
| 2 | 51R | Resistor_SMD:R_0603_1608Metric | R50, R51 |
| 2 | Conn_01x07_Pin | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J7, J13 |
| 2 | PTVS5V0Z1USKYL | Diode_SMD:Nexperia_DSN1608-2_1.6x0.8mm | D1, D5 |
| 2 | SPH0645LM4H-B | Sensor_Audio:Knowles_SPH0645LM4H-6_3.5x2.65mm | MK1, MK2 |
| 2 | Screw_Terminal_01x02 | TerminalBlock_RND:TerminalBlock_RND_205-00045_1x02_P5.00mm_Horizontal | J8, J9 |
| 2 | ~ | Capacitor_SMD:C_0402_1005Metric | C53, C54 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C75 |
| 1 | 1825910-6 | digikey-footprints:Switch_Tactile_THT_6x6mm | S1 |
| 1 | 2.2nF | Capacitor_SMD:C_0805_2012Metric | C11 |
| 1 | 4R7 | Resistor_SMD:R_0603_1608Metric | R44 |
| 1 | 5k | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 732k | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | Buzzer | Buzzer_Beeper:MagneticBuzzer_ProSignal_ABT-410-RC | BZ1 |
| 1 | CM1624 | Package_DFN_QFN:OnSemi_UDFN-16-1EP_1.35x3.3mm_P0.4mm_EP0.4x2.8mm | U14 |
| 1 | Conn_ST_STDC14 | Connector_PinHeader_1.27mm:PinHeader_2x07_P1.27mm_Vertical | J3 |
| 1 | DS3231M | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U15 |
| 1 | ECS-_327-12_5-34B-TR | digikey-footprints:SMD-2_3.2x1.5mm | XTAL1 |
| 1 | ESD-Logo_6.6x6mm_SilkScreen | Symbol:ESD-Logo_6.6x6mm_SilkScreen | l1 |
| 1 | ESP32-C3-WROOM-02 | RF_Module:ESP32-C3-WROOM-02 | U7 |
| 1 | KiCad-Logo2_5mm_SilkScreen | Symbol:KiCad-Logo2_5mm_SilkScreen | l4 |
| 1 | L | Inductor_SMD:L_0603_1608Metric | L2 |
| 1 | LD39150DT33-R | Package_TO_SOT_SMD:TO-252-3_TabPin2 | U4 |
| 1 | LTR-303ALS-01 | OptoDevice:Lite-On_LTR-303ALS-01 | U13 |
| 1 | M95256-WMN6P | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 1 | MAX3485 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U10 |
| 1 | MCP73871 | Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm_ThermalVias | U1 |
| 1 | Micro_SD_Card | Connector_Card:microSD_HC_Wuerth_693072010801 | J11 |
| 1 | OSHW-Logo2_24.3x20mm_SilkScreen | Symbol:OSHW-Logo2_24.3x20mm_SilkScreen | l3 |
| 1 | PESD1CAN_215 | digikey-footprints:SOT-23-3 | D6 |
| 1 | RAK3172 | RAK3172:RAK3172 | U8 |
| 1 | RFPC-SMA27-F | RFPC-SMA27-F:GRADCONN_RFPC-SMA27-F | J6 |
| 1 | S2B-PH-K-S_LF__SN_ | S2B-PH-K-S_LF__SN_:JST_S2B-PH-K-S_LF__SN_ | J2 |
| 1 | S5B-ZR_LF__SN_ | S5B-ZR_LF__SN_:JST_S5B-ZR_LF__SN_ | J10 |
| 1 | SCD40-D-R2 | Sensor:Sensirion_SCD4x-1EP_10.1x10.1mm_P1.25mm_EP4.8x4.8mm | U12 |
| 1 | SGP41-D-R4 | SGP41-D-R4:XDCR_SGP41-D-R4 | U11 |
| 1 | SM712_SOT23 | Package_TO_SOT_SMD:SOT-23 | D7 |
| 1 | SN65HVD230 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U9 |
| 1 | STM32H743ZITx | Package_QFP:LQFP-144_20x20mm_P0.5mm | U5 |
| 1 | Symbol_CreativeCommonsPublicDomain_SilkScreenTop_Small | Symbol:Symbol_CreativeCommonsPublicDomain_SilkScreenTop_Small | l5 |
| 1 | TPD2E2U06DCK | Package_TO_SOT_SMD:SOT-323_SC-70 | U2 |
| 1 | TPS61023DRLT | TPS61023DRLT (1):SOT50P160X60-6N | U3 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4110 | J1 |
| 1 | WE-SL2 | WE-SL2:WE-SL2 | L3 |
| 1 | WEEE-Logo_4.2x6mm_SilkScreen | Symbol:WEEE-Logo_4.2x6mm_SilkScreen | l2 |
| 1 | XEL4030-102MEC | XEL4030-102MEC:IND_XEL4030-102MEC | L1 |
The 281 most common of 282 parts.
Questions
How big is the OpenAirScope PCB?
It measures 100 × 75 mm and has 4 copper layers, 1.6 mm thick.
What parts does the OpenAirScope use?
282 parts, built around the ESP32-C3-WROOM-02-H4, MAX3485ED, MCP73871EV and SN65HVD230D. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the OpenAirScope KiCad files?
From the emertcakir/OpenAirScope repository on GitHub, at the commit this page was made from: the board is hardware/OpenAirStation-V0-Draft/OpenAirScope.kicad_pcb and its schematic hardware/OpenAirStation-V0-Draft/AirSensors.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the OpenAirScope design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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