S0tool

ESPHome-based DIY device that turns water and energy meters into smart, monitored meters.

Physical productone_timeeu

S0tool is a DIY, ESPHome-based device and hardware kit that reads S0 pulse outputs from water and energy meters, turning them into smart meters that report real-time consumption to Home Assistant. It's sold as a build-it-yourself kit with documentation, a shop, and community support. It's aimed at home automation hobbyists who want to monitor utility consumption from a standard non-smart meter.

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