# A tiny viewfinder for your Ricoh GR

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

## Hardware
M5Stack StickS3; RICOH GR II, III/IIIx or IV

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.

## Shopping list

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 × M5Stack StickS3
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Wireless viewfinder and shutter controller.
- Destination: https://shop.m5stack.com/products/m5sticks3-esp32s3-mini-iot-dev-kit
- Match: Product page
- Link review: Page checked; stock not assessed
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-c2ac6e11f54cc9e37f847dda361f3ccefde2cecb6fc800bd6c0cbddc0619cf38
- Source: https://github.com/sky18Dragon/RICOH-GR-Live-View-Shooting

### 1 × Supported RICOH GR camera
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Camera being controlled.
- Notes: 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.
- Destination: https://us.ricoh-imaging.com/products/gr-iv
- Match: Exact product; firmware must be checked separately
- Link review: Page checked; stock not assessed
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-c2ac6e11f54cc9e37f847dda361f3ccefde2cecb6fc800bd6c0cbddc0619cf38
- Source: https://github.com/sky18Dragon/RICOH-GR-Live-View-Shooting

### 1 × 3D-printed StickS3 hot-shoe mount
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Attach the display.
- Notes: Use STL/STEP from the repository cad folder; do not assume a generic cold-shoe adapter fits.
- Sourcing: No exact purchase link verified; confirm the model and requirements above before ordering.
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-c2ac6e11f54cc9e37f847dda361f3ccefde2cecb6fc800bd6c0cbddc0619cf38
- Source: https://github.com/sky18Dragon/RICOH-GR-Live-View-Shooting

### 1 × USB-C data cable
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Connect to the computer for programming or data.
- Notes: 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.
- Destination: https://www.adafruit.com/product/4474
- Match: Accessory example: USB-A to USB-C, 1 m, data capable
- Link review: Page checked; stock not assessed
- Evidence: Setup requirement — check against your configuration
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-c2ac6e11f54cc9e37f847dda361f3ccefde2cecb6fc800bd6c0cbddc0619cf38
- Source: https://github.com/sky18Dragon/RICOH-GR-Live-View-Shooting
- Source: https://www.adafruit.com/product/4474

### 1 × Computer for setup
- Requirement: Tool
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Build, configure or flash the software.
- Sourcing: Use existing equipment or match the specification above. No exact purchase link verified.
- Evidence: Setup requirement — check against your configuration
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-c2ac6e11f54cc9e37f847dda361f3ccefde2cecb6fc800bd6c0cbddc0619cf38
- Source: https://github.com/sky18Dragon/RICOH-GR-Live-View-Shooting

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

## Setup
Device firmware

## Coding tool
Codex

## 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.

## Sources
- Original build: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-c2ac6e11f54cc9e37f847dda361f3ccefde2cecb6fc800bd6c0cbddc0619cf38
- Supporting source: https://github.com/sky18Dragon/RICOH-GR-Live-View-Shooting

Source reviewed 2026-11-04. Not hands-on tested.