1-wire DS18B20 change resolution

[gjniewenhuijse]

Oke, i can do a reading and custom precision with:

Code:

require('ow')
value = ow.readfile('SENSORID', 'temperature', true) -- third argument will force a new conversion
log( round(value,1) )

I know its theoretical, but can i change the precision by lm4 or do i need to connect them to a arduino and execute the following code:

Code:

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, next reboot it has the new precision
   delay(15);              // wait for end of write
}