For questions dealing with devices that measure the physical world around us and translate it into signals for the Raspberry Pi.

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-1
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0answers
14 views

Can I use RPi for a Connected sensors Project? [on hold]

I am currently in my third year of my UG course in Computer Science. As a mini project, I am working on a Connected sensors for Home automation. The project was to use arduino to collect data from ...
0
votes
0answers
5 views

tsl235 and the RPi

I'm trying to get the tsl235 (https://www.sparkfun.com/products/9768) working with the PI and the bcm2835 library (or without it, just using a simpler mmio) and while the operation of the tsl235 ...
0
votes
1answer
31 views

Can a 74LVC8T245 be used for 5v inputs all by itself?

I got this kit that came with a 74LVC8T245 (http://www.wvshare.com/product/74LVC8T245-Board.htm) that I have been able to get 5v output working just fine but as for a 5v input sensor I'm not 100% sure ...
3
votes
1answer
55 views

Multimeter functionality for raspberry pi

Are there any sensors that would allow me to measure voltage/current/resistance similar to using a multimeter but would allow me to interface with them through a library? (for example, measuring ...
0
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0answers
26 views

cheapest presence sensor for a dor

I have a big wardrobe in a dark room, I put leds inside and I want to light them up when the door (sliding door) opens. Whats the cheapest and more robust way to detect door opening, with less damage ...
0
votes
1answer
25 views

One Wire Temperature auto setup while booting

I have temperature sensor (DS18B20), also known as a 'one-wire sensor'. I've connected it to pin 4. I am using this code that someone wrote (source). #!/usr/bin/env python import time ...
1
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1answer
64 views

IndexError DS18B20 Temperature sensor

I have this temperature sensor (DS18B20). I've followed the tutorial on Adafruit (here). First I had to setup some modules by doing: sudo modprobe w1-gpio sudo modprobe w1-therm Then I check the ...
-2
votes
1answer
28 views

How to set ID for multiple sensor like LED, Temperature Sensor and etc?

Sorry to disturb you guys, I would like know how to set a custom ID to sensor like LED, Temperature Sensor and etc. Example: Like 1 LED sensor, not smart LED. Only can display real time data and ...
0
votes
3answers
41 views

Connecting multiple light sensors to one port

Is it possible to connect multiple light sensors to one port and similiarly control multiple motors through one port only? (I've tried searching for answers on Google, couldn't find a convincing ...
1
vote
1answer
23 views

Mesure weight using force [on hold]

Is it possible to use this force-sensitive resistor to measure weight between 10g-5kg(0,4oz-176oz)?
0
votes
1answer
359 views

Connecting a bluetooth module to GPIO?

I got a bluetooth sensor from this Chinese company. Model is BC417. The module has six pins: KEY RXD TXD 5.0 3.3 GND I'm totally newbie about GPIO and sensors, only got that module and a few ...
0
votes
1answer
160 views

How to send multiple sensor data from arduino to the raspberry pi, and from there to google docs

I want to build a arduino- based weather station, now I want to know how I can send sensor data from the arduino uno to the raspberry pi and from there to a spreadsheet in gdocs. My problem is, that I ...
1
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0answers
44 views

How to develop for Mikroe's click boards with free software only?

Hardware offer for the Raspberry Pi When looking for sensors, actuators etc, that are easy to use, one can spot that a Raspberry can host a Pi click shield - extension board for Raspberry Pi® with ...
1
vote
1answer
61 views

May I connect directly to GPIO headers without stripboard

I wish to install a thermo and a humidity sensor on my Raspi but I have no place for a stripboard or veroboard in my waterproofcase. So I would like to know whether I can connect them directly on the ...
0
votes
1answer
104 views

Use Arduino library on raspberry

I am not sure whether this is a stupid question or not, but you may be able to help. I bought a sensor board and the manufacturer provides an Arduino-library to use the sensor. Is there a way for me ...
1
vote
1answer
78 views

Real-Time Computaion! Processing Speed Problem!

I am pretty new to the c++ and raspberry pi. I am trying to run a real time sensor motor control with the help of Raspberry pi, using cpp. I am sniffing the sensor data through Ethernet and sending ...
2
votes
2answers
163 views

Graphic output sensor data

I have some experience with Arduino but never used Raspberry Pi. I'm looking for the best way to show my sensors data via RPi. What I would want to do is: Arduino to read sensor data and send it to ...
1
vote
1answer
80 views

Using FSR with Raspberry Pi

I am trying to get values from a force sensitive resistor with Raspberry Pi. I saw an example using Arduino such as this http://learn.adafruit.com/force-sensitive-resistor-fsr/using-an-fsr and I can ...
1
vote
0answers
132 views

Using 5 volts on an mcp3008

I have a couple different types of hall effect sensors I would like to test out using an mcp3008 ADC to interface with my pi. The sensors run on 4.5v minimum. Before I configure the ADC for 5 volts I ...
0
votes
1answer
92 views

Analog to Digital converter

Can I connect a ADC0804LCN to a raspberry pi ? http://pdf1.alldatasheet.com/datasheet-pdf/view/77309/INTERSIL/ADC0804LCN.html
1
vote
0answers
206 views

How to use photoelectronic sensor (keyence PZ2-42) with raspberry pi

Please help meee..I want to use the photoelectronic with the raspberry pi for a micromouse maze Using sensors to detect the presence of micromouse at specific locations .I was given all this from my ...
1
vote
1answer
107 views

Connecting an etape using spi

I have an etape liquid level sensor http://www.adafruit.com/datasheets/eTape%20Datasheet%2012110215TC-12_040213.pdf hooked up to my raspberry pi model b through an MCP3008. The MCP3008 is connected ...
1
vote
1answer
74 views

How you would build a Robot with a raspberry Brain? [closed]

I think about building a Robot with the raspberry as the Control Unit. Anybody of you done that already? The question is about Which hardware can controlled by the raspberry? How you would solve the ...
2
votes
0answers
117 views

Connecting multiple ds18b20 to different GPIO ports

There are loads of examples of using the ds18b20 temp probe, or even multiples all to GPIO #4, and then running: modprobe w1-gpio modprobe w1-therm cat /sys/bus/w1/devices/28-*/w1_slave The issue I ...
3
votes
4answers
180 views

System for determining occupied seats

I need an app that can do live monitoring of whether each seat in an auditorium is occupied, so visitors can load the app and see where to sit. The auditorium has a relatively flat ceiling 4m ...
1
vote
1answer
47 views

IR detector lamp, digital monitoring

I just bought this IR-detector+lamp device: http://www.biltema.se/sv/Bygg/Belysning-och-lampor/Arbetslampa/Halogenstralkastare-med-IR-detektor-46191/ It turns the light on for a certain time when ...
2
votes
4answers
601 views

Looking for a pi-compatible thermometer for brewing

I would like to use my Raspberry Pi to monitor my fermentation temperature. I would like a thermometer I can attach to the side of the carboy and wire up to the Raspberry from a few feet away. For ...
1
vote
1answer
173 views

Having trouble reading (MQ 4) sensor digital value

I've a MQ 4 (smoke etc) sensor module, as listed here. It has these inputs/outputs: VCC = +5V DOUT = digital out AOUT = analogue out GND When I connect it to a voltmeter it outputs (DOUT) 3.1V ...
2
votes
1answer
547 views

Do I have to connect a resistor to my DHT22 humidity sensor?

I've just bought a DHT22 sensor to connect to my RPi but most tutorials mention there should be a resistor connected between the sensor and the GPIO pin. Is this necessary? Will it work without or ...
2
votes
1answer
311 views

How can I convert an optical mouse into an optical flow sensor?

I'm working on a rover.I'm using it with Raspberry Pi as my microprocessor.And can anyone tell me that whether i need an encoder with it.
1
vote
0answers
83 views

Anyone who encountered this error while building the SensorKinect from source?

Anyone who encountered this error while building the SensorKinect from source? The source was downloaded from https://github.com/avin2/SensorKinect. The guide that I'm following was this: ...
1
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2answers
1k views

How to connect 20 DS18B20 temperature sensors to RPi?

RPi is working fine with 10 1-wire temperature sensors, but I need to connect 20.
0
votes
2answers
323 views

Best source for raspberry pi sensors and accesories [closed]

this is a bit of a vague question but I have been building my own pi robot and am just getting to the stage where I wish to start adding some sensing capability however I am not an experienced techie ...
1
vote
0answers
186 views

USB Temp/hum sensor for Pi help [closed]

Im currently in the middle of making my pi read data from a humidity and temperature sensor. My plan is to: Connect a sensor to my pi which will read humidity and temp A perl script will then be ...
2
votes
3answers
1k views

Raspberry Pi and BMP085 (I²C)

I tried to get the temperature and pressure with the BMP085 sensor and my Raspberry Pi (256MB) via I2C. I used this Adafruit tutorial: Using the BMP085 with Raspberry Pi, but this isn't working for ...
2
votes
1answer
410 views

Sensor via USB to PI

I have a temperature/humidity sensor that connects via USB to a PC. There is a program that reads it and displays the data. Is there an easy way to get the Pi to read this data and get it into an Open ...
4
votes
5answers
10k views

Multiple temperature sensors with a Raspberry Pi

I have seen plenty of examples for using one temperature sensor with the Raspberry Pi, however, how can I multiplex 5-6 temperature sensors to a Raspberry Pi? I want to read the temperature from ...
1
vote
1answer
588 views

Using a 12 bit ADC with raspberry pi

I have a LM35 sensor connected to my Pi using the MCP3204(12bit ADC). To read the values I found a python wrapper for the Spi protocol called py-spidev. I am following tutorials which uses use the ...
1
vote
1answer
1k views

How to trigger GPIO event using an active infrared sensor

Trying to get an active infrared sensor to trigger an event on a GPIO pin. I'm using python and the RPi.GPIO library on an RPi model B. Some background info, not sure how relevant it is, but I'm a ...
1
vote
1answer
494 views

Error accessing 0x13: Check your I2C address

When I run this (sudo i2cdetect -y 1): I get: pi@raspberrypi ~ $ sudo i2cdetect -y 1 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- ...
4
votes
1answer
226 views

A good sensor for a Bed Occupied detector?

I'm trying to build a presence sensor for my bed, to help trigger assorted home automation functions. My first thought was to use a FSR and place it between the frame and boxsprings. I know how to ...
0
votes
2answers
795 views

Reading common food thermometer probes

I have 2 temp probes from a Maverick ET-7 (common on Amazon.com). I would like to setup my Raspberry Pi to read temps from these. I purchased a breadboard and Pi cobbler + cable from Adafruit. Is this ...
2
votes
1answer
873 views

help to understand the dht22 C code

This is the C code that i'm using to read the temperature and the humidity from the DHT22 sensor but i have some doubts about how this code works. #define BCM2708_PERI_BASE 0x20000000 #define ...
1
vote
2answers
2k views

What can I do on a Pi with an Infrared sensor but no Arduino?

So, in a recent batch of purchases from Adafruit, I picked up one of these $2 gadgets: http://learn.adafruit.com/ir-sensor/overview It can pick up signals from TV remotes and such. I'm wondering, ...
1
vote
2answers
3k views

How to get an SPI Analog-to-Digital (MCP3204) working with the GPIO?

I have an MCP3204 12-bit Analog-to-Digital Converter (ADC), and a Raspberrypi. Does anyone know what I need to plug where to get them to communicate? Is there an SPI python library I can use? O am ...
4
votes
1answer
359 views

How can I use the RPi GPIO to make a headphone sensing audio jack?

I am working on a project that involves a raspberry pi acting as an internet radio client which the public can access by plugging their own headphones into a 3.5mm (1/8”) jack. They will have access ...
2
votes
2answers
2k views

i2cdetect doesn't catch ANY address. How can I tell if I2C working correctly?

I'm having difficulties interfacing the Raspberry Pi to basically any I2C sensor. I've gone through a lot of tutorials on how to get the I2C driver to work and my connections are correct. Still, ...
0
votes
1answer
1k views

PiFace module and sensors

I'm looking all over the forums in order to be sure that I'm able to have two sensors (temperature in my case) and a proximity sensor. Can anyone guide me to a compatibile sensor (I'd prefer a ...
1
vote
1answer
721 views

Communication with XBee devices

I am going to build a sensor network composed by some Arduino Fio that will collect some data and send it to a RaspberryPi. After a little research it seems that XBee would be a good choice for the ...
0
votes
1answer
179 views

Photometer / Colormeter

I am wondering if there is a photometer/colormeter sensor that would be easily plugged into a raspberry pi. I am looking at driving my Philips HUE from the exterior light color, to brighten my ...