A multi-channel rhodamine-pyrazole-based chemosensor (RhPzNH₂) was prepared by a simple synthetic method. The photophysical characteristics of the compound were determined in various organic solvents. The new probe responded discriminately to acidic and basic pHs; in acidic media (pH < 3) it produced a yellow emission centered at 555 nm, while in basic media (pH > 10) its emission was blue with a maximum at 460 nm. Moreover, the new RhPzNH₂ sensor responded significantly to Cu²⁺ by increasing the absorbance at 530 nm (limit of detection (LOD) 7×10⁻⁸ M). The stoichiometric ratio of Cu²⁺ ions and the probe in the complex formed was found to be 1:2, respectively. Possible structural arrangements of the ligand molecule and Cu²⁺ in the complex were studied by DFT computations and the most likely structural organization was proposed. Furthermore, the responses of the [(RhPzNH₂)₂-Cu]²⁺ complex were significant towards Ba²⁺ and CN^–. The substitution of Cu²⁺ in the complex decreased remarkably the absorbance at 530 nm by 72 %. On the other hand, CN^– increased both the absorbance at 530 nm and the fluorescence emission at 550 nm by sharing it in the coordination within the complex increased solubility of the complex, and blocked the energy transfer from the compound to Cu²⁺. Moreover, the RhPzNH₂ mimicked three different INHIBIT logic gates that can be integrated to work as a molecular digital comparator.