I am trying to use the Spark Core to read from a bunch of sensors and send the data up to a webserver.
When I hook up the DS18B20 to the Spark Core on a breadboard, it works every time. However when I solder it into my circuit with a bunch of other sensors on it, I fail to find any devices on the OneWire bus. This makes me think it’s a problem with my circuit. I would love for someone to check out my schematic and look for potential problems.
Edit: Corrected schematic to fix switched pH and ORP probes and to put CHG_N on D1.