I’m using on my system a few DS temp sensor connected in standard mode to RPI (power in to rpi +3V3 pin 1, and data out to GPIO 4, 4k7 resistor between V+ and data). All works fine from several years.
I want to add 2 more DS sensors, but there is a wire limitation, and I have at this place only the +5V, GND, and the data wire from the RPI. First i placed a 3V3 stabilizer IC for supply these 2 sensors, the system recognized the sensors, but the values are readed wrong (-180 ~ -200 grade C). After this i built a voltage divider with 2 resistors, but the system become very unstable, all the sensors appeared / disappeared randomly.
Can anyone have similar situation when multiple DS sensors must be powered in different way?
Can be the default GPIO 4 (input for DS sensors) changed to any other GPIO?