Abstract: A method to control a mixer (10) for concrete, mortar, powders, dry and semi-dry granulates, cement-based mixes or similar or comparable mixes or mixtures, comprises an input step in which it provides to communicate to a control and command unit (15) of the mixer (10) a plurality of input data correlated to the formulation of the mix that has to be treated in the mixing cycle, a detection step in which it provides to detect the values of an electric quantity characteristic of the electric power line of a drive unit (12) comprised in the mixer (10), a processing step in which the control and command unit (15) processes the data detected in the detection step in order to calculate the overall active power that is generated as a function of time, and to carry out one or more verifications, comparing the data processed with one or more of the respective data introduced among the input data, in order to transmit to a programmable logic controller (14) that commands the functioning of the mixer (10) alternately a c