4 layers85 × 50 mm
Weather Kit Project
Mikecerc/WeatherKit_MainBoard
KiCAD Schematic Files for the weatherkit main board
98 parts
4 layers37 × 45 mm
Weather Kit Project
Mikecerc/WeatherKit_MainBoardKiCAD Schematic Files for the weatherkit main board
- Size
- 37 × 45 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 68
- Pads
- 269
- Tracks, vias
- 541, 66
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 20 Oct 2026
- Updated
- 6 Nov 2026
Overview
Weather Kit Project is an open-source printed circuit board by Mikecerc, from the Mikecerc/WeatherKit_MainBoard repository on GitHub. It is a 4-layer board of 37 × 45 mm with 39 parts on 68 nets, routed with 541 tracks and 66 vias.
It is built around the LPS22HH and TP4056-42-ESOP8. Its parts include 15 capacitors, 8 ICs, 5 resistors, 1 connector and 1 inductor. It belongs with the STM32 boards of this library.
Main components
2
LPS22HH
HLGA-10(2x2)-40℃~+85℃ 0.025hpa 0.5hpa 1.7V~3.6V 26Kpa~1.26bar 900nA I2C、SPI On-chip temperature compensation、Integrated ADC and digital interface、On-chip calibration and non-volatile storage、Integrated signal amplifier、On-chip temperature output HLGA-10(2x2) Pressure Sensors ROHSSTMicroelectronicsPressure Sensors
TP4056-42-ESOP8
ESOP-8-40℃~+85℃ 1 1A 2uA 4.2V 4V~8V Charging IC Lithium Battery Support ESOP-8 Battery Management ROHSTOPPOWERBattery Management
Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 1µF | Capacitor_SMD:C_01005_0402Metric | C5, C6, C7, C9, C13, C14, C15 |
| 6 | 10µF | Capacitor_SMD:C_01005_0402Metric | C1, C2, C3, C4, C8, C12 |
| 6 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1, TP2, TP3, TP4, TP5, TP6 |
| 2 | 470pF | Capacitor_SMD:C_01005_0402Metric | C10, C11 |
| 2 | 5.1kΩ | Resistor_SMD:R_01005_0402Metric | R1, R2 |
| 1 | 10KΩ | Resistor_SMD:R_01005_0402Metric | R5 |
| 1 | 500KΩ | Resistor_SMD:R_01005_0402Metric | R4 |
| 1 | AS3935 | Package_DFN_QFN:MLPQ-16-1EP_4x4mm_P0.65mm_EP2.8x2.8mm | U8 |
| 1 | Ai-Thinker-Ra-02 | RF_Module:Ai-Thinker-Ra-01-LoRa | U4 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_TDK_PS1240P02BT_D12.2mm_H6.5mm | BZ1 |
| 1 | L | RF_Antenna:Coilcraft_MA5532-AE_RFID | L1 |
| 1 | LPS22HH | Package_LGA:ST_HLGA-10_2x2mm_P0.5mm_LayoutBorder3x2y | U6 |
| 1 | LTC3245xDE | Package_DFN_QFN:DFN-12-1EP_3x4mm_P0.5mm_EP1.7x3.3mm | U5 |
| 1 | MCP2221AxML | Package_DFN_QFN:QFN-16-1EP_4x4mm_P0.65mm_EP2.5x2.5mm | U2 |
| 1 | R | Resistor_SMD:R_01005_0402Metric | R3 |
| 1 | SHT4x | Sensor_Humidity:Sensirion_DFN-4_1.5x1.5mm_P0.8mm_SHT4x_NoCentralPad | U7 |
| 1 | STM32U031K8Ux | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm | U3 |
| 1 | TP4056-42-ESOP8 | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm_ThermalVias | U1 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_GCT_USB4110 | J1 |
The 37 most common of 39 parts.
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Questions
How big is the Weather Kit Project PCB?
It measures 37 × 45 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Weather Kit Project use?
39 parts, built around the LPS22HH and TP4056-42-ESOP8. 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 Weather Kit Project KiCad files?
From the Mikecerc/WeatherKit_MainBoard repository on GitHub, at the commit this page was made from: the board is Sensor_Board/Weather_Kit_Project.kicad_pcb and its schematic Base_Station/Display.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Weather Kit Project design in my own project?
Its repository states no licence, so its author keeps all rights: ask Mikecerc before reusing the design.