
Wisp
huulanka/wisp
Open-source ESP32 room climate monitor — CO2, VOC, humidity, temperature and light sensing with custom PCB, MQTT/HomeKit integration, and OTA firmware updates. Full hardware + software, from schematic to BOM.

Hs sensor shield is an open-source printed circuit board by Heimonen-Solutions-AS, from the Heimonen-Solutions-AS/hs-sensor-shield repository on GitHub. It is a 4-layer board of 65 × 56 mm with 14 parts on 38 nets, routed with 168 tracks and 31 vias.
It is built around the BH1750FVI-TR, LPS22HB and SCD41-D-R2. Its parts include 5 ICs, 4 capacitors and 2 connectors. It belongs with the sensors and measurement boards of this library.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4 |
| 2 | MountingHole_2.7mm_M2.5 | MountingHole:MountingHole_2.7mm_M2.5 | MH1, MH2 |
| 1 | BH1750FVI-TR | sensors:WSOF-6_L2.6-W1.6-P0.50-TL-EP | U5 |
| 1 | Conn_02x05_Odd_Even | Connector_PinSocket_1.27mm:PinSocket_2x05_P1.27mm_Vertical_SMD | J2 |
| 1 | GPIO | Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical | J1 |
| 1 | LOGO | logos:heimonen solutions | G*** |
| 1 | LPS22HB | Package_LGA:ST_HLGA-10_2x2mm_P0.5mm_LayoutBorder3x2y | U4 |
| 1 | SCD41-D-R2 | Sensor:Sensirion_SCD4x-1EP_10.1x10.1mm_P1.25mm_EP4.8x4.8mm | U3 |
| 1 | SHT4x | Sensor_Humidity:Sensirion_DFN-4_1.5x1.5mm_P0.8mm_SHT4x_NoCentralPad | U2 |
| 1 | ~ | sensors:SGP41 | U1 |
It measures 65 × 56 mm and has 4 copper layers, 1.6 mm thick.
14 parts, built around the BH1750FVI-TR, LPS22HB and SCD41-D-R2. 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.
From the Heimonen-Solutions-AS/hs-sensor-shield repository on GitHub, at the commit this page was made from: the board is hs-sensor-shield.kicad_pcb and its schematic hs-sensor-shield.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask Heimonen-Solutions-AS before reusing the design.

huulanka/wisp
Open-source ESP32 room climate monitor — CO2, VOC, humidity, temperature and light sensing with custom PCB, MQTT/HomeKit integration, and OTA firmware updates. Full hardware + software, from schematic to BOM.

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