Mikrokontroler utama yang mengelola logika timer koin, komunikasi heartbeat via WiFi, dan kendali smart
charging relay 8 tablet.
GPIO 13
IN1 (Relay Charger Tablet 1)
GPIO 14
IN2 (Relay Charger Tablet 2)
GPIO 27
IN3 (Relay Charger Tablet 3)
GPIO 26
IN4 (Relay Charger Tablet 4)
GPIO 25
IN5 (Relay Charger Tablet 5)
GPIO 33
IN6 (Relay Charger Tablet 6)
GPIO 32
IN7 (Relay Charger Tablet 7)
GPIO 23
IN8 (Relay Charger Tablet 8)
GPIO 18
Relay 1 Channel (NO/COM)
GPIO 19
Signal Pulsa Koin (COIN PIN)