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Temp Probe – DS18B20 — 2 wire configuration and tested May 12, 2011

Posted by rik94566 in aquaponic automation, aquaponics, arduino, DIY aquaponics, DS18B20, indoor aquaponics, indoor gardens, sensor, Stainless Steel Temp Probe, Standards, Temperature Probe.
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In so many cases there is never just one solution to a situation.  So is the case here.  DS18B20 can be connected using only a two wire configuration.  If you want to cut down on wire or have only two wires to work with the mission can be accomplished

2-wire configuration

In the 2-wire configuration the resistor is connected to the signal (YELLOW)  lead from the probe and connected with the resistor in between the power (RED) side of the arduino.  The arduino signal wire  (YELLOW) connection is taken off the signal side of the resistor.

When the sketch test is run, results are generated as expected.

2-wire configuration - correct readings from sketch

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