A tiny Bluetooth trigger that plugs into the RZ67's electrical remote port, and an Android app to fire it. Instant shutter, bulb exposures and self-timer countdowns, all from your phone. Rev 1 is built and shooting film. Rev 2 is on the bench.
Each piece lives in its own repository with its own build instructions, releases and issue tracker. This page is the map.
ESP32-C3 firmware and a custom PCB. Two isolated PhotoMOS channels close the camera's S1/S2 contacts. Runs off a 250 mAh LiPo with light sleep and 0 dBm BLE for long standby.
Companion app for Android. Finds the trigger automatically, reconnects when the link drops, and puts the three shooting modes one tap away.
An iPhone app speaking the same BLE protocol. Not started yet. If you want to build it, the protocol is six bytes and fully documented.
The RZ67's remote port exposes two contacts, S1 and S2. Shorting them to camera ground fires the shutter. The trigger does exactly that with optically isolated PhotoMOS relays, so the ESP32 never shares a ground with the camera.
Four pins, viewed from the front of the camera.
| Pin | Signal |
|---|---|
| 1 | 6 V — do not connect |
| 2 | GND |
| 3 | S1 switch |
| 4 | S2 switch |
The trigger advertises as OpenRZ67. Commands are single bytes written without response. Value = button × 10 + state.
| Byte | Action |
|---|---|
| 11 | Fire shutter, 100 ms pulse |
| 21 / 20 | Start / end bulb |
| 31 / 30 | Start / cancel 10 s countdown |
| 3 n 1 | Countdown of n seconds |
Direct release, countdown, bulb. Switch modes at the top, fire with the big button. Follows your system light or dark theme.
This works today, but it is a hobby project under active development, not a product. Rev 1 boards are fabricated and in regular use. Rev 2 is designed, not yet fabricated, and is what the repo currently ships. Read the trigger README before ordering anything.
Order the PCB from the Gerbers in pcb/kicad/out, or wire a XIAO ESP32C3 and two PhotoMOS relays per the diagram above.
Clone the trigger repo and run pio run -t upload with PlatformIO. Hold BOOT while resetting if upload doesn't start.
Four-pin JST XH to the camera's remote plug. Leave pin 1 unconnected and double-check orientation before you plug it in.
Grab the APK from releases. Power on the trigger and the app connects on its own.
PhotoMOS relays instead of mechanical, side-entry camera connector, and a print-tested enclosure.
Same protocol, same three modes. Open to contributors.
The remote port is only the first thing on this camera worth opening up.