wisp
huulanka
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.
Components (55)
| Reference | Value | Description |
|---|---|---|
| Q3 | AO3400A | |
| Q4 | MMBT3904 | |
| U2 | AP63203WU-7 | |
| U3 | ESP32-S3-WROOM-1-N8 | |
| U4 | SCD41-D-R2 | |
| U5 | SGP41 | |
| U6 | BH1750FVI-TR | |
| U7 | BME280 | |
| U8 | USBLC6-2SC6 | |
| BZ1 | Buzzer | |
| C2,C7,C9,C10,C16-C19 | 100nF | |
| C3,C5,C12,C13 | 10uF | |
| C4,C20,C21 | 1uF | |
| C6,C14 | 22uF | |
| D1 | WS2812B | |
| D2,D3,D5-D10,D13-D15 | PESD5V0L1UL | |
| D4 | SS14 | |
| D11 | 1N4148W | |
| D12 | GREEN | |
| F1 | 500mA | |
| J1 | USB-C | |
| J2 | Second I2C Bus | |
| J3 | mmWave UART (LD2410) | |
| J4 | I2S Mic (INMP441) | |
| J5 | Switched DC Output | |
| J6 | Reed/Hall Contact | |
| J7 | 1-Wire Bus | |
| J8 | Analog Sensor Pad | |
| J9 | Expansion Header | |
| L1 | 2.2uH | |
| R1,R2 | 5.1k | |
| R3,R4,R20 | 10k | |
| R7 | 330R | |
| R8-R11,R14 | 4.7k | |
| R12 | 100R | |
| R13 | 1k | |
| R15-R17 | 220R | |
| R18 | 100k | |
| R21 | 2.2k | |
| R22 | 4.7R | |
| SW1 | RESET | |
| SW2 | BOOT | |
| TP1 | JTAG_MTDI | |
| TP2 | JTAG_MTCK | |
| TP3 | JTAG_MTMS | |
| TP4 | JTAG_MTDO | |
| TP5 | +3V3 | |
| TP6 | GND | |
| TP7 | SDA | |
| TP8 | SCL | |
| TP9 | EN | |
| TP10 | IO0 | |
| TP11 | UART0_TX | |
| TP12 | UART0_RX | |
| TP13 | LED_DOUT |