DUMLAB
Hardware · DLM-1C9620C3

DUMLAB RELAY MINI

The module inside every DUMLAB switchboard — relay, TRIAC fan control and the full firmware stack, on one 20×20mm board.

PHYSICAL SWITCHGPIO interrupt · debounced
RELAY OUTPUT10A · 230V rated
TRIAC FAN CTRLZero-cross phase dimming
CLOUD + OTAMQTT · signed firmware
// HARDWARE

WHAT'S ON THE BOARD

ESP32Dual-core MCU · WiFi + BLE · runs the full local control loop
RELAY10A · 230V rated · mechanical click feedback
TRIAC DIMMERPhase-angle control, 5 calibrated fan speed levels
ZERO-CROSS DETECTIONSynchronizes firing angle to the AC waveform
HLK ISOLATED PSUMains-isolated 230V→5V supply, no shared ground
// SOFTWARE

WHAT RUNS ON IT

CAPTIVE PORTALSelf-hosted WiFi onboarding, no app account required
MQTTLocal broker first, DUMLAB Cloud broker as fallback
OTASigned, resumable, delta-aware firmware updates
DEVICE SHADOWDesired vs. reported state, reconciled on reconnect
SCHEDULINGRuns entirely on-device — survives internet outages
// CONSOLE

BOOTS LIKE REAL HARDWARE

Because it is. This is the same serial output you'd see over USB.

serial0 · dumlab-core