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ESPFlight Docs v1
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Docs / Build / Assembly

Assembly

Assemble the v1 reference in controlled stages, then stop for visual, electrical, and first-power checks before flight validation.

ESPFlight Docs · v1 • Validated v1 documentation path

# Before you solder

Work from the official v1.0 schematic/PCB and Assembly Notes. Keep the battery disconnected and all propellers removed.

Use a clean, well-lit, non-conductive work surface.
Keep a multimeter available for continuity, polarity and voltage checks.
Dry-fit Wemos/MPU headers before soldering; do not force module alignment with solder.
Keep M1–M4 labels visible or record the physical motor-to-output mapping before wiring.

# Assembly sequence

  1. 1

    Inspect the bare PCB

    Check the board outline, pads, vias and obvious fabrication damage before installing parts.

  2. 2

    Install PCB parts / verify assembled PCB

    If the PCB was assembled by a service, compare it with the official BOM and inspect orientation and solder quality. If assembling manually, follow the schematic/PCB rather than this page as the placement authority.

  3. 3

    Fit headers and controller module

    Dry-fit the Wemos D1 mini and header connection so the module is square and mechanically relaxed before soldering.

  4. 4

    Fit the MPU-6050 module

    Use the documented I2C wiring and reference orientation. Do not rotate the IMU and assume firmware axes will still match.

  5. 5

    Wire M1–M4 deliberately

    Route each motor to the documented output/corner and keep wires away from the propeller plane and sharp edges.

  6. 6

    Complete battery and peripheral wiring

    Confirm battery polarity and any LED/buzzer/optional-sensor connections against the schematic.

  7. 7

    Secure the mechanical build

    Modules, battery and wiring must not shift into the propellers or pull on small solder joints.

# Electrical inspection before power

Battery disconnected: inspect for solder bridges, reversed modules/connectors and loose strands.
Use the multimeter to check for an unexpected near-short between the board supply input and ground. A brief changing reading can be caused by capacitors; a persistent near-zero resistance needs investigation.
Confirm battery connector polarity against the schematic and the actual battery lead before connecting power.
Check continuity from each documented motor output to the intended physical motor wiring.
Do not install propellers yet.

# Assembly checkpoint

PASS GATE

Continue only when the physical build matches the v1 wiring/orientation reference and there is no unresolved short, polarity, module-orientation or motor-mapping question. Next: Wiring & Orientation, Hardware Verification, then Firmware Download & Flash.