My improvements, in addition to asynchronous-like operation, include being able to request a sensors by index and making the bulk of the work into reusable functionsīecause we haven't programmed in our sensors ROM addresses yet you'll get some bogus temperature readings and some likes like: ROM = 28 E7 B 63 4 0 0 44 Sensor not found in arrayĬopy out all these ROM lines, one for each sensor, so we can put them in the sketch. The DS18B20 specific code in this example is based on the code at which I did not write. If using an ESP-01, supporting circuit for programming and running it (not included in the drawings here).USB-Serial device if your board doesn't have one built in.A basic understanding of programming in the Arduino IDE.A basic understanding of how to upload programs your ESP8266 module.Arduino IDE installed with the ESP8266 board profile installed (I recommend Adafruit's Huzzah guide, which can easily be applied to any ESP8266 based board).The solution is to emulate an asynchronous system by using the Arduino millis() function and a variable. However, due the conversion delay required for DS18B20 readings this can introduce quite a delay in your Arduino sketch if you use the delay() function like most examples do. One of the coolest things about OneWire and DS18B20 temperature sensors is that each sensor has its own embedded address so you can have many of them on 1 data wire.
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