An iButton is a small metal disc which contains an electronic serial number which can be determined when the iButton is placed in a suitable receptacle. This serial number can be used to control entry access to buildings or allow other authorisation or for personnel logging.
The DS18B20 temperature sensor module can be configured to use an iButton connection cable (part RSA002) instead of the temperature sensor. This allows this module to be used as an iButton create module.
Bill of Materials
|iButton Probe (with LED) ||RSA002 ||1 ||Buy Now |
|iButton DS1990A-F5 ||LOG020 ||1 ||Buy Now |
|330 resistor (pack 100) ||RES330R ||1 ||Buy Now |
|4k7 resistor (pack 100) ||RES4K7 ||1 ||Buy Now |
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