Temperature and Humidity Sensor Node Design
continue
Thought for 3 sec
I’ll inspect the current schematic and project docs, run design checks, then fix any schematic issues I find before summarizing what remains for layout.
Worked for 52 sec
I’m blocked because the account has no available ACUs, so I can’t continue AI layout actions right now.
Completed this session:
- Verified the schematic/ERC state: no open errors or warnings were reported.
- Set up the PCB as a 45 mm × 30 mm rounded rectangle with a standard 4-layer stackup and 0.5 mm board keepout.
- Confirmed the board area is workable, though routing may be tight around the ESP32/power section.
Remaining work:
- Place components with ESP32 antenna keepout, USB-C edge placement, compact buck/eFuse layout, and isolated SHT41 placement.
- Route the PCB.
- Run DRC and airwire checks.
- Fix any routing or layout violations before manufacturing export.
Review placement constraints
Check ACU balance
Run layout checks
Estimate board size
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Technical Construction File — USB-C WiFi BLE Environmental Sensor Node
Status
Draft.
Applicable Areas
- FCC Part 15 / intentional radiator and unintentional radiator considerations.
- CE RED / EMC / RoHS / REACH considerations for EU sales.
- ISED/UKCA as needed by target market.
Wireless Technology Summary
Table
| Module | MPN | Technology | Frequency band | Notes |
|---|---|---|---|---|
| U1 | ESP32-C3-WROOM-02-N4 | Wi-Fi 802.11 b/g/n + BLE 5.x | 2.4 GHz ISM | Use module antenna keepout and integration rules. |
Produced Project Files
- Project specification: requirements and block-level decisions.
- Power budget and design notes: power-path decisions and current-limit strategy.
- Firmware starter: initial firmware and pin map.
- Board bring-up plan: first-article validation procedure.
RF Integration Notes
- Place module antenna at board edge with no copper/components in the antenna keepout on any layer.
- Preserve module ground/antenna recommendations and do not change antenna type.
- Final enclosure material and nearby metal must be evaluated for RF detuning.
Consumer Product Notes
- If using USB logos, confirm USB-IF requirements.
- Include labeling/user manual statements required by the selected module grant and target market.
- Plan EMC testing on the complete product, especially due to buck regulator and USB cable emissions.
- Implement secure provisioning, signed OTA updates, credential protection, and factory reset behavior.
Open Items Requiring External Evidence
- Final PCB layout/Gerbers.
- Module grant/certification evidence and exact labeling statements.
- Accredited EMC/RF test reports.
- Final user manual and Declaration of Conformity signed by TechSpec.
Status
Applicable Areas
Wireless Technology Summary
Produced Project Files
RF Integration Notes
Consumer Product Notes
Open Items Requiring External Evidence
