Apparatus and associated methods relate to a smart hook, a safety harness module, and associated electronic components that detect a safety state of a user by monitoring various parameters at the smart hook and safety harness module and determining whether the user is using proper safety protocol at extreme heights and/or whether the user has experienced a height-related accident. In an illustrative example, the user may don a safety harness that may include a module that contains sensors that monitor an acceleration/velocity/position of the user and/or ambient air pressure around the user. The module may receive wireless signals from at least one rebar hook having sensors that monitor the acceleration/velocity/position and gate position of the rebar hooks. A controller included with the safety harness module may use these sensors to advantageously determine the safety state of the user and generate alert/warning signals.