A method for controlling an automatic coffee bean grinder (2) which is separate from an automatic coffee brewing machine (1) using ground coffee produced by said coffee bean grinder (2), is shown, wherein a flowmeter sniffer element (15) is located in or at a housing (3) of said coffee brewing machine (1) is capturing the water flow-through information measured by a water flowmeter (5) of said coffee brewing machine (1), and transmits the water flow-through information to a grinder control unit (26) located in the automatic coffee bean grinder (2), and the grinder control unit (26) controls the grinder module (24) as a function of the water flow-through information transmitted from said flowmeter sniffer element (15).