This paper deals with the problem of clock synchronization in WSN. Clocks are modeled as non-identical double integrators with uncertain zeros and outputs corresponding to their time-readings. Synchronization is achieved through a control strategy based on second order linear consensuslike algorithm, and its robustness with the respect to the uncertainties on the clocks' dynamics is studied resorting to recently developed tools for synchronization of heterogeneous networks. An implementable,

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... linear version of the previous control strategy is also revised. Numerical simulations show that the behavior of the linear model which is analyzed here well approximates that of the implementable, realistic one.