diff --git a/README.md b/README.md new file mode 100644 index 0000000..32ae049 --- /dev/null +++ b/README.md @@ -0,0 +1,19 @@ +DS2482_OneWire +============== + +A OneWire library using the DS2482 I2C->1-Wire bridge. Released under GPL. + +This is designed to use Dallas DS18B20 temperature sensors connected to a DS2482 I2C->1-Wire bridge as part of a temperature monitoring system. + +The code heavily borrows from two sources: +* Paeaetech's DS2482 library (https://github.com/paeaetech/paeae/tree/master/Libraries/ds2482) - the bulk of the functionality if from here, slighty changed. +* OneWire library (http://www.pjrc.com/teensy/td_libs_OneWire.html) - the CRC code is from here, along with all method names so we can use new library in place of this. + +DS18B20 is a 1-Wire temperature sensor (http://www.maximintegrated.com/datasheet/index.mvp/id/2812). These are commonly driven directly from an I/O pin using the OneWire library. This is fine for short and simple networks, but errors start to occur with large numbers (6+ devices) and networks longer than 5m or so. + +The DS2482-100 is a I2C->1-Wire bridge (http://www.maximintegrated.com/datasheet/index.mvp/id/4382), containly functionality that means it is better at driving long and complex networks. + +Breakouts for the Raspberry Pi, which can be connected to Arduino, are available from Sheepwalk Electronics: +http://www.sheepwalkelectronics.co.uk/product_info.php?cPath=22&products_id=30 + +