Single wire bus communication system with method for handling simultaneous responses from multiple clients

A single wire bus communication system, comprising:

• a bus wire;
• a message originating device having an output connected to said bus wire, a pull-up device connected to pull said bus wire up to a “high” logic level when enabled, and a pull-down device connected to pull said bus wire down to a “low” logic level when enabled;
• at least one client device, each client device having an output connected to said bus wire, a pull-up device connected to pull said bus wire up to a “high” logic level when enabled, and a pull-down device connected to pull said bus wire down to a “low” logic level when enabled;
• wherein each of said client devices' pull-up devices conducts more current when enabled than said message originating device's pull-down device;
• said system arranged such that, in response to a trigger event that requires responses from multiple client devices simultaneously, said message originating device enables its pull-down device, and each of said client devices disables its pull-down device when conveying a “low” logic level onto the bus wire.