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set up temperature resolution on DS18B20 and store it
ds.search(addr); // address on 1wire bus
if (addr[0] == DS18B20) // check we are really using a DS18B20
{
ds.reset(); // rest 1-Wire
ds.select(addr); // select DS18B20
ds.write(0x4E); // write on scratchPad
ds.write(0x00); // User byte 0 - Unused
ds.write(0x00); // User byte 1 - Unused
ds.write(0x7F); // set up en 12 bits (0x7F)
ds.reset(); // reset 1-Wire
ds.select(addr); // select DS18B20
ds.write(0x48); // copy scratchpad to EEPROM
delay(15); // wait for end of write
}
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