4 layers27.9 × 63.9 mm
Tiny4FSKGeneralShield
mpkendall/Tiny4FSK-Ecosystem
Set of expansion boards, sensor breakouts, and additional modules to operate with the Tiny4FSK tracking system.
35 parts3GPL-3.0
2 layers23.3 × 18.8 mm
BME280Breakout
mpkendall/Tiny4FSK-Ecosystem3Set of expansion boards, sensor breakouts, and additional modules to operate with the Tiny4FSK tracking system.
- Size
- 23.3 × 18.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 17
- Nets
- 5
- Pads
- 39
- Tracks, vias
- 63, 30
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Apr 2025
- Updated
- 23 Mar 2026
Overview
BME280Breakout is an open-source printed circuit board by mpkendall, from the mpkendall/Tiny4FSK-Ecosystem repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 23.3 × 18.8 mm with 17 parts on 5 nets, routed with 63 tracks and 30 vias.
It is built around the BME280. Its parts include 4 capacitors, 2 resistors, 2 connectors and 1 IC. It belongs with the sensors and measurement boards of this library.
Main components
1README
README.mdTiny4FSK Ecosystem
A set of additional features, tools, and boards to expand functionality of Tiny4FSK
TinyShield
TinyShield is an expansion board which sits atop of Tiny4FSK's expansion pins. It adds:
- An OLED screen for basic flight diagnostics,
- SD card for logging,
- 5v logic headers for more sensors,
- Integrated buck/boost for wider range of power sources, including a LiPo connector,
- Qwiic headers for adding more sensors!
Code in the Tiny4FSK repository already implements automatic sensor, SD card, and screen scanning and initialization. Functions pertaining to these features are configurable in both config.h and the main Tiny4FSK.ino file.
To get started, solder female headers to the 2.54mm pins on the back side of the shield. To interface with the Tiny4FSK board, additionally solder 2.54mm male header rows to the USB, power, and data headers on the Tiny4FSK. Mounting them for alignment may assist with soldering.
Insert the shield board onto the Tiny4FSK's headers as shown. No code changes are required to continue with SD card logging and screen initialization.
Parts
17| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 2 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C3, C4 |
| 2 | 4.7k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | LOGO | SparkFun-Qwiic:qwiic_4mm | G***, G*** |
| 2 | Qwiic Connector | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J5, J6 |
| 1 | BME280 | Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering | U1 |
| 1 | I2C Address | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP2 |
| 1 | LOGO | LOGO | G*** |
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Questions
How big is the BME280Breakout PCB?
It measures 23.3 × 18.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BME280Breakout use?
17 parts, built around the BME280. 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 BME280Breakout KiCad files?
From the mpkendall/Tiny4FSK-Ecosystem repository on GitHub, at the commit this page was made from: the board is BreakoutBoards/BME280Breakout/BME280Breakout.kicad_pcb and its schematic BreakoutBoards/BME280Breakout/BME280Breakout.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BME280Breakout design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).