A Pebble with Tasker could get you there (HTTP POST) or one of the integrations. Even IFTTT or DO. You could probably also even go with the Magic Form app descr

A Pebble with Tasker could get you there (HTTP POST) or one of the integrations. Even IFTTT or DO. You could probably also even go with the Magic Form app described in the OP's article. Making it context aware is possible too (e.g. in the bathroom or at work) with some thinking of Wifi routers or if you wanted NFC tags, iBeacons.