The schematic has been arranged automatically. Flux can redraw it to be more readable, with components placed in related groups and wires drawn more legibly. This takes about 10-60 mins.
Wireless Module Integration
Scope
Integration evidence and action list for ESP32-S3-WROOM-1-N8R2 when Wi-Fi or Bluetooth LE is enabled in the finished dashboard compass. This is an engineering checklist, not legal certification of the end product.
Module Evidence
Module family: ESP32-S3-WROOM-1 with onboard PCB antenna; U1 module outline is 18.0 × 25.5 × 3.1 mm.
The ESP32-S3-WROOM-1 datasheet identifies Figure 11-1 as the recommended PCB land pattern containing the antenna-area dimensions required for PCB design.
The datasheet directs base-board module placement to Espressif’s hardware-design guidelines and requires minimizing base-board interference with the antenna.
Implemented Antenna Geometry
U1 is mounted on the bottom, at the left board edge, with its antenna facing outward.
A component-local 18.0 × 5.75 mmESP32 Antenna Keepout zone follows U1 orientation.
The zone is configured across all copper layers and excludes components, pads, vias, routes, fills, polygons, and nets.
Placement verification found zero keepout violations and zero out-of-bounds components.
The exact zone dimensions follow the authoritative footprint/package graphical antenna region. The machine-readable datasheet text identifies the controlling drawing but did not expose its internal dimension labels; verify the final fabrication view against Figure 11-1 before release.
Prefer the onboard PCB antenna outside the base board, with the feed point close to the board edge.
If it cannot overhang, keep the feed point as close to the edge as possible and provide adequate clearance.
Keep the antenna away from USB circuitry, high-frequency clocks, crystals, UART traces/test points, switching nodes, and other noise sources.
Provide adequate ground copper and dense ground vias near, but not inside, the antenna clearance area.
Maintain at least 15 mm clearance in all directions inside the product housing around the PCB antenna.
Test the final product for communication throughput and range.
FCC Evidence and Conditions
FCC ID: 2AC7Z-ESPS3WROOM1.
The Espressif FCC certificate identifies a Single Modular Approval for 2.4 GHz Wi-Fi and Bluetooth under Part 15C.
The grant requires the integrator to ensure the final composite product complies with FCC requirements and points to KDB 996369.
Different antenna configurations and portable configurations under §2.1093 require separate approval/evaluation.
The OEM integration manual states the certified integral antenna configuration, no transmitter co-location without evaluation, a 20 cm user-separation condition for the modular authorization, and visible end-product wording: “Contains FCC ID: 2AC7Z-ESPS3WROOM1” (public manual copy).
Because a vehicle dashboard can be closer than 20 cm to occupants, do not assume the module grant alone closes RF-exposure compliance. Obtain a product-specific regulatory assessment if the installed geometry cannot reliably maintain the stated separation.
Evaluated configuration: PCB antenna, 3.26 dBi; Wi-Fi 2412–2472 MHz at 19.9 dBm EIRP rated; Bluetooth LE 2402–2480 MHz at 10 dBm EIRP rated.
Certificate evidence includes EN IEC 62368-1, EN 50665 / EN IEC 62311, EN 55032 / EN 55035, ETSI EN 301 489-1/-17, and ETSI EN 300 328.
The certificate scope is the submitted module evidence, not automatic conformity of the finished compass. The final product still needs a RED/EMC/safety assessment and technical file appropriate to its markets.
Product Integration Checklist
Preserve ESP32-S3-WROOM-1-N8R2 and its integral PCB antenna; no antenna substitution.
Confirm no copper/component/fastener intrusion in the all-layer antenna keepout on final Gerbers.
Maintain ≥15 mm housing clearance around the antenna; keep metal and wiring outside the clearance.