The PIENU experiment at TRIUMF aims to measure the pion decay branching ratio $R={Gamma}({pi}^+{rightarrow}e^+{ u}_e({gamma}))/{Gamma}({pi}^+{rightarrow}{mu}^+{ u}_{mu}({gamma}))$ with precision $<0.1$% to provide a sensitive test of electron-muon universality in weak interactions. The current status of the PIENU experiment is presented.
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