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

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30 views

pigpio and 1wire working together

I want to have two more-or-less independent programs running on my Raspberry Pi, one that monitors temperature and another that does protocol translation between two asynchronous serial devices. I ...
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1answer
26 views

IEEE80211n message transmission between 2 Raspberry Pi

I have got a wifi dongle that supports the ieee80211n protocol. This one is plugged into the pi that gets real time data from the device.The data it receives from the client needs to be sent (may be ...
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47 views

My Pi2 doesn't cognize One-Wire

I'm using Raspberry Pi 2 with Gentoo. I tried to use Digital Thermometer(DS18B20) with 1-wire so I prepared: login as: qwpo1030 Using keyboard-interactive authentication. Password: ...
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2answers
118 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
916 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
135 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 ...
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155 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 ...
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3answers
537 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
974 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 ...
2
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0answers
460 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.