I need help with a ds18b20 problem. I have four ds18b20 sensors running on a single Prop pin. They all work fine as long as temperatures are below approximately 120 degrees Fahrenheit. Frequently but not always, when the temperature reaches 120 the sensor fails. Giving no Reading and stopping data from the other three sensors. Basically I stop getting any readings from any of the sensors when any one of them goes above approx 120F. When the temperature drops the sensors all begin providing data.
I duplicated the hardware and got exactly the same result. I am using Micah Dowtys objec,t as the program to read data from the sensors. I am thinking
I have bad batch of sensors from Maxim.
Has anyone experienced anything like this?
Thanks in advance for any help.