Hi,
I'm using digitemp to get temperature readings from a few DS18S20s I bought recently.
I have a DS9097U plugged into a USB-Serial adapter. It is working fine.
I have gotten only one DS18S20 to work properly. I'm not sure if it's user error (I'm pretty new to soldering) or something wrong with the sensors.
The error I'm getting is "CRC Failed. CRC is 63 instead of 0x00". The exact command I'm running is digitemp -a -s /dev/ttyU0
I am attempting to wire everything up using some 2-port (RJ11/12) jacks I had laying around. Since phone cable does a crossover, I'm connecting the green cable of port "A" and the red cable of port "B" to GND on the DS18S20, and the red cable of port "A" and green cable of port "B" to DQ. This should be ok.
I've tried wiring them up directly to phone cable as well. Green cable to GND, red to DQ. Same error. With the sensor I do have working though, it worked fine on the phone cable.
Am I doing something noticeably wrong? Perhaps it's my soldering technique? Any tips for a newbie? =)
Thanks!
marco
I'm using digitemp to get temperature readings from a few DS18S20s I bought recently.
I have a DS9097U plugged into a USB-Serial adapter. It is working fine.
I have gotten only one DS18S20 to work properly. I'm not sure if it's user error (I'm pretty new to soldering) or something wrong with the sensors.
The error I'm getting is "CRC Failed. CRC is 63 instead of 0x00". The exact command I'm running is digitemp -a -s /dev/ttyU0
I am attempting to wire everything up using some 2-port (RJ11/12) jacks I had laying around. Since phone cable does a crossover, I'm connecting the green cable of port "A" and the red cable of port "B" to GND on the DS18S20, and the red cable of port "A" and green cable of port "B" to DQ. This should be ok.
I've tried wiring them up directly to phone cable as well. Green cable to GND, red to DQ. Same error. With the sensor I do have working though, it worked fine on the phone cable.
Am I doing something noticeably wrong? Perhaps it's my soldering technique? Any tips for a newbie? =)
Thanks!
marco