PID Controlled Thermostat Using ESP32 (Applied to a Rancilio Silvia Coffee Machine) : 6 Steps (with Pictures) - Instructables
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PID Control Retrofit KIT for Rancilio Silvia w/ screw RTD sensor PID Temperature Control Retrofit KIT for Rancilio Silvia Espresso machine [KIT-RSRTD] - $149.50 : Auber Instruments, Inc., Temperature control solutions for