ESP32-Platine mit Sensoren
Thought for 9 sec
Ich kontrolliere jetzt die aktuelle Platzierung gezielt auf Konflikte: Überlappungen, Bauteile außerhalb der Platine, fehlende Footprints, Schutzbereich-Verletzungen und stale/dangling traces. Airwires bewerte ich separat, weil die Platine noch nicht geroutet ist.
Worked for 53 sec
Ich habe einen echten Konflikt gefunden: Der USB-C-Shield von J1 kollidiert mit C21. Ich verschiebe jetzt nur C21 aus dem Shield-Bereich heraus und prüfe anschließend erneut.
Worked for 6 mins 17 sec
Kontrolle abgeschlossen und korrigiert.
Gefunden:
- Ein echter Platzierungskonflikt: J1 USB-C Shield kollidierte mit C21.
Korrigiert:
- C21 wurde aus dem USB-C-Shield-Bereich verschoben.
- Dabei wurden kleinere Nachbaranpassungen vorgenommen, ohne die Grundplatzierung zu ändern.
- Die erneute Prüfung zeigt: keine Überlappungen, keine Bauteile außerhalb der Platine, keine fehlenden Footprints, keine ungültigen Layer-/Schutzbereichsfehler.
Hinweis: Die verbleibenden Airwires sind normal, weil noch nicht geroutet wurde.
DRC ausführen
Airwires prüfen
Platzierung optimieren
J1-Abstände prüfen
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Ask about this doc
Project Specification — 24V ESP32-C6 Matter Environmental Presence Sensor
Status
This file captures the revised target architecture requested on 2026-05-17. The existing schematic currently contains a USB-C powered ESP32-C6 environmental sensor with SHT40, TPS259474 eFuse, TPS62840 buck, USB-C programming, USB ESD, buttons and status LED. The new request is a larger architecture change: primary 24 V DC input, Matter/Thread capability, mmWave + PIR presence/motion sensing, more environmental sensors, and optional battery/solar operation.
User Requirements
- MCU: ESP32-based design.
- Connectivity: WiFi, Bluetooth LE, Matter and Thread capable.
- Programming: USB-C.
- Primary power: 24 V DC.
- Sensors:
- mmWave presence detection.
- PIR motion detector.
- Temperature.
- Humidity.
- Light level.
- Air quality.
- Future/optional power: rechargeable battery with solar panel input.
Recommended Architecture
MCU / Wireless
Use the existing ESP32-C6 module family if possible, because ESP32-C6 supports WiFi, Bluetooth LE and IEEE 802.15.4, enabling Thread/Matter designs. Keep native USB programming over USB-C and retain BOOT/RESET buttons.
Power Tree
Recommended power domains:
Text
24V DC input -> input fuse / reverse polarity / surge TVS / EMI filter -> high-voltage buck converter to 5V system rail -> efficient 3.3V buck or buck/LDO post-regulator for ESP32 + sensors USB-C 5V VBUS -> USB data + ESD protection for programming -> optional alternate 5V power input OR programming-only VBUS sense, depending on final choice Solar panel input -> solar-capable single-cell Li-ion/LiPo charger / power-path IC -> battery connector + protection -> system rail OR backup rail feeding 3.3V regulator
Power Path Decision Needed
There are two viable approaches:
-
24V-primary device with optional battery backup
- 24 V powers the system normally.
- Solar charges the battery when available.
- Battery keeps the low-voltage system alive during 24 V outage.
- Recommended for wall/ceiling/building sensor nodes.
-
Battery/solar-primary device with 24V auxiliary input
- Battery powers the sensor most of the time.
- 24 V is treated as an external charging/supply source.
- Requires aggressive sleep design; mmWave sensors may dominate power.
Default assumption for schematic work: 24V-primary with optional 1-cell Li-ion/LiPo backup and solar charger header.
Preliminary Power Budget
Approximate sizing values until all exact sensor MPNs are chosen:
Table
| Rail | Load | Typical | Peak / Notes |
|---|---|---|---|
| 3.3V | ESP32-C6 module | 80-180 mA | WiFi peaks can be several hundred mA |
| 3.3V or 5V | mmWave presence module | 60-150 mA | Depends strongly on module |
| 3.3V | PIR sensor interface | 50-500 uA | Many PIR modules need 3.3V or 5V |
| 3.3V | Temp/humidity sensor | <1 mA average | SHT40 already present |
| 3.3V | Light sensor | <1 mA | I2C |
| 3.3V | Air-quality sensor | 10-80 mA | MOX/VOC sensors draw more due heater |
| 3.3V | Pull-ups/LEDs/margin | 5-20 mA | LED current configurable |
Initial design target:
- 3.3 V rail: at least 600 mA peak capability.
- 5 V rail: at least 500 mA if mmWave or external sensor modules need 5 V.
- 24 V input buck: size for at least 3 W output plus margin.
Candidate Functional Blocks
1. 24V Input Protection
- 2-pin screw terminal or pluggable terminal block for 24 V DC.
- Fuse or resettable PTC sized after final current budget.
- Reverse polarity protection, ideally P-channel MOSFET or ideal-diode controller.
- TVS diode rated for 24 V industrial transients.
- Input bulk capacitor and EMI filtering.
2. 24V to 5V/3.3V Conversion
- Replace or supplement the current low-voltage TPS62840 path; it is not suitable as a direct 24 V input regulator.
- Use a high-voltage buck regulator with adequate input voltage margin, followed by 3.3 V conversion.
- Keep regulator input/output capacitors and inductor values strictly datasheet-based.
3. USB-C Programming
- Keep USB-C 2.0 receptacle.
- Keep CC1/CC2 5.1 kΩ pull-downs.
- Keep USB D+/D- ESD protection.
- ESP32-C6 native USB D+/D- to module pins.
- Decide whether USB-C powers the board during programming or is programming-only.
4. ESP32-C6 Core
- ESP32-C6 module retained for Matter/Thread/WiFi/BLE.
- 3.3 V decoupling and bulk capacitance near module.
- EN pull-up and reset filter.
- BOOT and RESET buttons.
- Antenna keepout and edge placement required in layout.
5. Sensor Bus
- I2C bus for temperature/humidity, light, and air-quality sensors.
- One shared pair of I2C pull-ups only.
- Each sensor gets local 100 nF decoupling.
- Optional interrupt pins routed where useful.
6. Presence / Motion
- mmWave module likely UART or GPIO + 3.3/5 V supply. Choose exact module before schematic wiring.
- PIR sensor can be digital GPIO input; add RC/filter and ESD/protection if connectorized.
7. Battery / Solar Option
- Solar input connector.
- Single-cell Li-ion/LiPo battery connector with NTC if supported.
- Solar charger / power-path IC chosen after panel voltage/current and battery capacity are known.
- Load sharing so 24 V/solar/USB/battery sources do not backfeed each other.
Suggested Sensor Choices to Evaluate
Final parts must be selected from available library parts and datasheets before wiring.
- Temperature/humidity: existing Sensirion SHT40 can stay.
- Light: VEML7700, OPT3001, or similar I2C ambient light sensor.
- Air quality: SGP40/SGP41/BME688/SCD40 family depending whether VOC-only or CO2-equivalent/real CO2 is desired.
- mmWave: LD2410/LD2410C-style module, Seeed MR24HPC1, or another documented 3.3/5 V UART module.
- PIR: low-power digital PIR module/sensor with 3.3 V-compatible output.
Open Decisions Before Schematic Rebuild
- Should USB-C also power the board, or only program/debug it?
- Battery type/capacity: single-cell Li-ion/LiPo assumed; confirm capacity and connector type.
- Solar panel voltage/current range.
- Preferred mmWave module.
- Air-quality definition: VOC index only, CO2-equivalent, or real CO2 measurement?
- Board form factor and connector preferences.
Proposed Schematic Rebuild Sequence
- Keep ESP32-C6, USB-C, USB ESD, buttons, status LED and SHT40 where suitable.
- Add 24 V input connector and protection block.
- Replace/add high-voltage buck conversion for 24 V input.
- Add optional solar/battery charger and power-path block.
- Add light, air-quality, mmWave and PIR sensor blocks.
- Wire all ICs per datasheet, with decoupling and pull-ups.
- Run ERC and fix remaining schematic issues.
- Only after schematic is clean: proceed to PCB sizing, placement and routing.
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