Mikrokontroler utama yang mengelola logika timer koin, komunikasi heartbeat via WiFi, dan kendali smart
charging relay 8 tablet.
GPIO 26
IN1 (Relay Charger Tablet 1)
GPIO 25
IN2 (Relay Charger Tablet 2)
GPIO 33
IN3 (Relay Charger Tablet 3)
GPIO 32
IN4 (Relay Charger Tablet 4)
GPIO 13
IN5 (Relay Charger Tablet 5)
GPIO 14
IN6 (Relay Charger Tablet 6)
GPIO 4
IN7 (Relay Charger Tablet 7)
GPIO 17
IN8 (Relay Charger Tablet 8)
GPIO 27
Relay 1 Channel (NO/COM)
GPIO 16
Signal Pulsa Koin (COIN PIN)