PID Control Retrofit KIT for Rancilio Silvia w/ screw RTD sensor PID Temperature Control Retrofit KIT for Rancilio Silvia Espresso machine [KIT-RSRTD] - $144.99 : Auber Instruments, Inc., Temperature control solutions for
How Rancilio Silvia Espresso Machine works with PID Control consecutive shots - YouTube
Auber PID voor Rancilio Silvia espressomachine
PID Controlled Thermostat Using ESP32 (Applied to a Rancilio Silvia Coffee Machine) : 6 Steps (with Pictures) - Instructables