I try connect multiple ds18b20 ( 18 pcs ) to two arduino with same power....
The results are strange; sometimes read value, sometimes it does not, etc. 4 second is OK, then 1 second ....
My question is how work sensor DS18B20,
- Send all the time temperature value every x msecond, and arduino only open port, to receive value with the command sensors.requestTemperatures
- sensor waiting for the command from arduino "sensors.requestTemperatures" and then send value to arduino....
I would like to use the same sensors on two Arduino. One is in the room where run code for the web server and 2x lcd displey, the other is in the boiler-fired room where run code for 7segment display.. I know I should probably use i2c connection between them,
But to me it is not clear why it would not be possible to use the same sensors on two arduino ( wuth sane power source )
Thank you for interpretation