Connected FCU · ESP32-C3 · beta
Open-HPA V3 hatBlat
The connected FCU: set it up and follow it from your phone.

hatBlat is the Open-HPA FCU (fire control unit) for HPA replicas with one or two solenoids, in the vein of the Gate Titan 2 and similar. Choose how your replica fires —semi, auto or bursts— and store three profiles to switch setups in seconds.
It has WiFi and Bluetooth: control it from HPA Commander on iPhone and Android, from the Apple Watch or from the Universal LCD. See mode, profile, shots and battery in real time, tune dwell and rate of fire without taking anything apart, and update the firmware over OTA.
Status: beta, being tested with players.
Coming soon: Universal Trigger, a companion board to drive the trigger or fire selector with a push button or a magnetic or optical sensor.
Coming soon
Beta testing program
We'll soon open the beta testing program. You'll be able to sign up with your details, pay for the device and receive it to test it before it gets certified. Beta units are prototypes under testing, without CE certification yet, meant for players who want to help us polish them.
Sign-up isn't open yet: we'll announce it here.
In HPA Commander





Features
- Semi, auto and 2, 3 or 5-round bursts
- 3 switchable profiles
- 11 dwell presets and live tuning
- Control from iPhone, Android, Apple Watch and Universal LCD
- Magazine simulator, tracer and bolt catch
- OTA firmware updates from the app
Specs
| Solenoids | 1 – 2 |
|---|---|
| Fire modes | SAFE · SEMI · AUTO · BURST |
| Profiles | 3 |
| Connectivity | Bluetooth LE · WiFi |
| App | HPA Commander (iOS · Android · Apple Watch) · Universal LCD · web |
| Web UI languages | ES · EN · RU · DE · JA · ZH · IT · FR |
| API | v2 · REST · WebSocket · BLE |
Get HPA Commander
Controlled with HPA Commander
FAQ
Does it work with dual solenoid engines?
Yes. The hatBlat supports both single and dual solenoid engines.
Do I need the app to use it?
Not to shoot: the setup is stored on the board. The app, the Apple Watch or the Universal LCD are for reading the status and changing settings.


HPA Commander