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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0answers
5 views

Using Rpi + nodejs to get reading of analog light sensor?

So I tried this tutorial: Tut light sensor and pi. I was unsuccessful in the tutorial as it jsut read out zeros endlessly? Question: is it possible to use Node.js to read values of a lightsensor ...
4
votes
2answers
123 views

Building a Raspberry Pi network monitor. My code is not working

Long story short. I moved, put my home server is a closet and started worrying about temp and humidity, saw a guide online to make a network temperature and humidity monitor from a rasberry pi and an ...
2
votes
1answer
44 views

Emulation of the Raspberry Pi with sensors

I am trying to emulate NOOBS or some other Raspberry Pi distro. I have tried QEMU but unfortunately this does not simulate peripheral devices (eg. Sensors) I was wondering if it was possible that a ...
1
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2answers
186 views

How to hook up an AM2302 temperature & humidity sensor several feet away from the Raspberry pi?

I have a raspberry pi running pipgio and am using the provided code under the python section to get the temperature and humidity reading from the AM2302 (http://www.adafruit.com/products/393). If I ...
0
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2answers
50 views

Ant and termite detection using PIR [closed]

I would like to detect ant and termite using either one of the following sensor. PIR or infrared object detection sensor. Is it possible to detect insects with them or it can detect only larger sized ...
1
vote
2answers
58 views

Soil moisture sensor compatibility

Can this sensor for ardunino can be used with raspberry pi b+ model? The specs of the sensor is Operating voltage: 3.3V~5V Dual output mode,analog output more accurate A fixed bolt ...
0
votes
1answer
35 views

external power supply to sensors

I will be using all of the following sensors at the same time on raspberry pi b+ model with 2Amp power supply. 1) DHT-11 Digital Temperature & Humidity Sensor for temperature and humidity ...
0
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0answers
87 views

Why my Raspberry Pi cannot find Si7021 (temperature and humidity sensor)?

I use this temperature and humidity sensor: Si7021, like below link http://www.dfrobot.com/wiki/index.php/SI7021_Temperature_and_humidity_sensor_SKU:TOY0054 I can get the sensor data by Arduino ...
1
vote
1answer
130 views

GPIO Temperature Sensor not Recognized

I recently tried to connect a temperature sensor (http://www.adafruit.com/product/381) to my RasPi via the GPIO, with a 4.7k (2Watt) resistor connecting the power and data (Source: ...
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0answers
49 views

BCM2835 Event Detection

I've got 2 motors, 2 encoders, a motor controller, and my B+ wired up. My B+ is running Arch with kernel: Linux drd 3.12.35-1-ARCH #1 PREEMPT Tue Dec 23 07:14:51 MST 2014 armv6l GNU/Linux. The 2 ...
1
vote
1answer
44 views

How to decide the amount of resistors for gpio

I will be using raspberry pi for connecting following sensors DHT-11 Digital Temperature & Humidity Sensor for temperature and humidity measurement HC-SR501 PYROELECTRIC INFRARED PIR MOTION ...
2
votes
1answer
224 views

Raspberry Pi as an captive portal with CoovaChilli

i'm looking to do something maybe not that common with my Rpi; I have a rowing machine and I want to connect it to my Pi to motivate me to do sport. To do this, I have an Arduino connected to a Pi ...
1
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0answers
42 views

pyvisa connection [closed]

I was hoping to use my RPi to read a sensor output, then (used as slave) to send the read values to a PC. I've been told that it could be done by using the pyVisa library in the master PC but I cannot ...
1
vote
1answer
45 views

Issues with multiple SDA sensors

I am facing some issues trying to connect two sensors which make use of the SDA GPIO. Ultra sound sensor HC-SR04 Gyroscope & Accelerometer MPU-6050 Separately, they work just fine, however ...
2
votes
1answer
45 views

Sensor minimum/maximum operating voltage

I've bought this sensor, and I'd like to connect it to Raspberry Pi (unless I manage i2c on dagu minidriver). The spec on the sensor say: Minimum operating voltage: 2.5 V Maximum operating ...
2
votes
1answer
260 views

How to connect a 12V fan sensor wire to the Pi

I have a 3-wire 12v DC fan (Sanyo Denki 9S1212M4011). It's actually getting 15V because my "12V" wall wart isn't accurate. When the fan is not running my multimeter tells me there is 14V on the ...
2
votes
3answers
107 views

Starting raspberry pi from button

I want to have a raspberry pi inside a hollowed out book with a contact switch that detects the book cover lifting, which will then send a signal to the pi to turn itself on/wake from a low power ...
0
votes
1answer
148 views

Maximum number of Sensors supported by raspberry pi [closed]

i would like to know how many sensors can be connected to raspberry pi at a time (i would like to connect sensors like temperature sensor,humidity sensor,pir motion sensor and 3 to 4 leds)
0
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1answer
22 views

Headers to connect xtrinsic sensor board

I have both (pi and board) as illustrated here. However, both boards have pins. Neither have the female ends for the connection. What kind of headers do i need? Are there female - female available? I ...
2
votes
2answers
567 views

Sensor to detect water/liquid level

I have a swamp cooler that does not turn off automatically when the water level evaporates below the safe level, and if I fail to turn it off even once I could damage it. The sensor simply needs to ...
1
vote
1answer
566 views

How many ultrasonic sensor can a Raspberry pi B+ can handle?

im planning to build a simple robot. having several ultrasonic sentor and 12 servo motor. How many ultrasonic sensor can a Raspberry pi B+ can handle? i need 8 ultrasonic working at the same time ...
0
votes
2answers
244 views

Control sensor: SainSmart TGS-2600

I've purchased a SainSmart TGS2600 Air Contaminants Sensor, but got no data sheet or the like. Does anybody know how to connect this breakout to the Pi?
0
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0answers
194 views

Camera doesn't work with GPIO PIR Sensor

I am using a 3 pin PIR Sensor to detect motion (https://www.modmypi.com/pir-motion-sensor). This is connected to the GPIO pins. I also have the RPI Camera module attached to the Camera CSI. I would ...
0
votes
0answers
125 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
1answer
197 views

Does the kernel support a BMP180 BMP85 digital pressure sensor out of the box?

The kernel generates a virtual file with the values for the famous temperature sensor DS 18B20. Is there a plug and play kernel support for the I2C digital pressure sensors BMP180 and BMP85 too? ...
0
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0answers
48 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
73 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
297 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
75 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
249 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
vote
2answers
535 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 ...
-3
votes
1answer
36 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
179 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
36 views

Mesure weight using force [closed]

Is it possible to use this force-sensitive resistor to measure weight between 10g-5kg(0,4oz-176oz)?
0
votes
1answer
1k 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 ...
1
vote
1answer
377 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 ...
2
votes
2answers
128 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
83 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
266 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
109 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
289 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
2answers
242 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
341 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
220 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
372 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
259 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
108 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 ...
3
votes
3answers
264 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
245 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
52 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 ...