A serial communication protocol providing data communication and power transmission over a single line.

learn more… | top users | synonyms

0
votes
2answers
46 views

Is this possible to read internal CPU temp sensor directly from cpp code?

I am working on the kind of RPi platform to collect some external sensors data or control relays (using the remote tools like web or sms). Next problem I am tring to solve now is to get the direct ...
4
votes
1answer
832 views

Raspbian /sys/bus/w1/devices/ is empty when having multiple 1-wire DS18B20 temperature sensors

I have a RasPi model B rev. 2.0 and two DS18B20 1-wire temperature sensors and they are working individually fine. I know I should be able to connect multiple 1-wire sensors in parallel but I can't ...
2
votes
1answer
120 views

One wire temperature sensor DS18B20 sudden precission drop

I wired 10 DS18B20 to the raspberry pi, in the normal powered mode. I am using the Raspbian's built in w1-gpio and w1-therm. I am able to read all the 10 sensor values. Problem is, after (seemingly ...
4
votes
3answers
2k views

What is a failproof method for testing a GPIO pin?

So, basically, I've been trying to get my raspberry pi to get the room temperature from a DS18B20 1-wire temperature sensor. I've read only GPIO 4 is capable of this, and I think for some reason GPIO ...
0
votes
0answers
143 views

Sensor DS18B20 - i2C - weird response

I'm using the raspberry pi (model B) with the DS18B20 to read temperature. I connected 9 sensors through the 1wire (port 4), however I'm having a few sensors with a weird problem. The sensors ...
0
votes
3answers
486 views

Raspberry Pi to Arduino protocol

So I'm looking to use a few (2 for now, more later) Arduinos in combo with a single Raspberry Pi master. This is basically the setup I want: What sort of protocol would be best for this type of ...
2
votes
1answer
815 views

Dallas 1-wire temperature sensor not working

I've connected a temperature sensor (DS18B20) to my Pi and want to read it using 1-wire, but it doesn't work. I have loaded the w1-gpio and w1-therm modules, added them to /etc/modules and rebooted a ...
1
vote
0answers
423 views

How to change the Pin used for the 1-wire Bus [closed]

By default the header Pin Nr. 7 us used by the 1-wire kernel module. I would like to change it to a one of the 4 new GPIO Pins of an Rev 2 Pi.