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Cameras & sensors / Device firmware

A tiny viewfinder for your Ricoh GR

A hot-shoe screen provides camera live view and a wireless shutter.

Read the original build See shopping list
A tiny viewfinder for your Ricoh GR — build photo from the creator’s source
tinker_zhang · build photo

What the hardware does

A StickS3 mounted on the camera's hot shoe receives live view over Wi-Fi and sends shutter commands, providing a compact alternative to a phone remote.

How the agent helped

The creator explicitly says the firmware was written with Codex and documents camera-specific connection steps and physical testing. Compatibility depends on the exact GR model.

Before you build

Requires model-specific pairing, firmware and a printed mount. Creator reports physical tests; directory has not repeated them.

Follow the build

youcanjustbuildthings.openai.chatgpt.site

Original build story

Creator showcase

github.com

Supporting source

Hardware

All hardware

Shopping list

Save as Markdown

The camera generations have different pairing paths. GR III without x and HDF variants have separate evidence levels in the repository; firmware and physical regression should be checked for the exact body.

Quantities are for one build. Unless marked source-specified, they are planning quantities; confirm kit contents and the chosen configuration before ordering.

  1. Qty. 1Plan / confirm
    Required

    M5Stack StickS3

    Wireless viewfinder and shutter controller.

    Sources & quantity basis

    Creator source. Planning quantity for one build; check the selected configuration.

    View product

    Product page

  2. Qty. 1Plan / confirm
    Required

    Supported RICOH GR camera

    Camera being controlled.

    Choose ONE: GR II, GR III/IIIx or GR IV under the repository’s model-specific support matrix. Link is GR IV only; not a recommendation to replace an existing camera.

    Sources & quantity basis

    Creator source. Planning quantity for one build; check the selected configuration.

    View product

    Exact product; firmware must be checked separately

  3. Qty. 1Plan / confirm
    Required

    3D-printed StickS3 hot-shoe mount

    Attach the display.

    Use STL/STEP from the repository cad folder; do not assume a generic cold-shoe adapter fits.

    Sources & quantity basis

    Creator source. Planning quantity for one build; check the selected configuration.

    No exact purchase link verified; confirm the model and requirements above before ordering.

  4. Qty. 1Plan / confirm
    Required

    USB-C data cable

    Connect to the computer for programming or data.

    A charge-only cable cannot flash firmware. Example requires a USB-A host port. If your computer has only USB-C, use an appropriate USB-C data cable instead. Reuse the device’s included cable where possible; this is not a standalone power-supply recommendation.

    Sources & quantity basis

    Setup requirement — check against your configuration. Planning quantity for one build; check the selected configuration.

    Example part

    Accessory example: USB-A to USB-C, 1 m, data capable

  5. Qty. 1Plan / confirm
    Tool

    Computer for setup

    Build, configure or flash the software.

    Sources & quantity basis

    Setup requirement — check against your configuration. Planning quantity for one build; check the selected configuration.

    Use existing equipment or match the specification above. No exact purchase link verified.

Source reviewed, not assembled or hands-on tested. A working product page does not confirm stock, firmware compatibility or a complete build.

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