Here, we examine how a polyelectrolyte reaction network is capable of dynamic switching, a feature we consider important for molecular information processing. Fig. depicts the network motif comprising two weakly charged polyelectrolytes, polyallylamine (PAH) and polyacrylic acid (PAA) and their corresponding polyelectrolyte complex (PAH-PAA). A microfluidic device, with PLL-coated surfaces, was used to perturb this acid-base equilibrium. According to the literature, the complexation of PAH and PAA can display different relaxation times, allowing us to investigate how the gradients could influence the history dependency of the polyelectrolyte complex (PEC). We introduced pH gradients to maintain the network under out-of-equilibrium conditions and demonstrated that such gradients allow for finetuning of the assembly and disassembly process during the formation of PECs, impacting how a preceding state of the system can determine the next state. Surprisingly, however, this dependency on the preceding state is lost in the presence of a PLL-coated surface. We demonstrate that the polyelectrolyte reaction network is capable of processing information encoded in the frequency of a temporal signal.