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

learn more… | top users | synonyms

1
vote
0answers
11 views

cansend to a CANBus device doesnt work

I am trying to control an Elcon battery charger (http://www.elconchargers.com/catalog/item/7344653/7638003.htm ) which outputs a DC voltage and current and can be set through a CANBus adapter. I ...
2
votes
1answer
35 views

Secugen Hamster Plus Fingerprint Sensor Raspberry Pi Integration

I have a Raspberry Pi and SecuGen Hamster Plus fingerprint sensor. I am trying to get fingerprint inputs from the sensor to Raspberry Pi using the following code. import sys import usb.core import ...
1
vote
0answers
22 views

long distance measuring modules - experiences: ME007-ULS V1

I am searching for a cheap non contact long distance (1 to more than 10 metres) measurement sensor with an accuracy <= 1cm. I'm already using the hc-sr04 ultrasonic in combination with the dht22 ...
1
vote
1answer
51 views

Using SignalR Client in UWP running on Windows IoT

I'm running Windows IoT on a Raspberry Pi. After I turn on my Raspberry Pi and Windows IoT starts up, I want to automatically begin reading sensor data from a serial port continuously, and also send ...
0
votes
1answer
19 views

How to use the Display - O - Tron 3000 with the hc-sr04?

I've got a Pimoroni Display-O-Tron 3000 and a HC - SR04 ultrasonic sensor. I want to use the Display to output the distance that the ultrasonic sensor reads, however, the DOT 3000 uses all the 5v ...
2
votes
0answers
40 views

what is required for automation in plantation? [closed]

What i want to do is when the moisture of the soil gets decreased i just want to give water to the plants or if i can just get a notification about the moisture would be fine. I have very little ...
3
votes
1answer
37 views

Any tutorials for the 10Dof DfRobot IMU? ADXL345 - HMC5883L - ITG-3205 - BMP085

I would like to connect this Imu to the Raspberry Pi via I2C. I am looking for a C/C++ or Python code to use the data provided by this imu. It integrates the ADXL345 accelerometer, HMC5883L ...
0
votes
1answer
39 views

Wireless vibration sensor

I have a raspberry pi and I want to connect a vibration sensor. The connection to the sensor should be wireless. I want to have approximately a range from 30m up to 100m. What would be a low price ...
4
votes
1answer
68 views

Windows IoT on Raspberry Pi: how to eliminate huge variations in reading pins values? (C#)

I have been porting the library for HX711 (Weighting sensor module amplifier) for Arduino to C# for Raspberry Pi Windows 10 Core. Source here on GitHub Arduino library It does work, I am even using ...
3
votes
3answers
68 views

Slot car races time recording

I'm new to Raspberry PI. I have to develop a system that records the lap times of slot car races on eight lane tracks, so I was thinking to use a Raspberry PI and a sensor for each lane installed on ...
0
votes
0answers
25 views

Pressure Sensor BMP183 and Raspberry Pi 2

I have a BMP183 (from Adafruit) and I'm trying to make it working on my Raspberry Pi 2 B, but I'm getting the following error: BMP183 returned ',#randomnumber#, ' instead of 0x55. Communication ...
1
vote
2answers
24 views

Sparkfun ADXL345 wiring issues

My project is using two TMP102's, one BMP180, and one ADXL345, all on I2C (there are a few other items, but not on I2C). I'm having no issues with anything but the ADXL345. Even when it's the only ...
0
votes
1answer
35 views

How to set up a leak sensor?

I'd like to set up a few water leak sensors in/under my house to avoid the kinds of plumbers' bills that I got recently! I had been hoping somebody had built such a thing with 1-wire or I2C ready to ...
0
votes
1answer
40 views

Sensing soil moisture levels with the RPI - ADC/GPIO & ADC/USB solutions anyone?

I bought a 'Soil Moisture Sensor' like this https://www.tiagoespinha.net/wp-content/uploads/2014/05/2014-05-09-12.51.20.jpg from ebay, and it turns out it's really nothing of the sort (just a ...
0
votes
0answers
10 views

Sensor for very low temperature (liquid nitrogen) [migrated]

I'm looking for a way to measure temperatures in range of 40 to -200 °C (100 to −320 °F). The usual DS18B20 digital thermometer works only down to -55 °C (-67 °F). A precision of 2 °C would be good ...
0
votes
1answer
45 views

Sensors With Raspberry pi Model 2

Can i connect any Sensor with raspberry pi? For example, I have a water flow sensor like this one, and an ultrasonic sensor like this one. Is it possible to connect it to a Raspberry Pi? Or I'll need ...
1
vote
1answer
42 views

Air pressure switch for balloon

For a demo that I want to prepare I need a pressure switch (pressure sensor) that regulate the pressure inside the balloon. The schema is the following: balloon inflated by an air compressor, ...
2
votes
3answers
353 views

Where to find libraries for using existing popular sensors? [closed]

I am new to pi and was wondering if there are any existing libraries for common sensors. I have used Arduino in the past and that time I didn't use any existing libraries, just checked specs for ...
1
vote
0answers
38 views

Motion sensor does not detect motion unless “shaken”

I have the following hardware: Raspberry Pi 2 Motion sensor (http://www.amazon.com/Great-Deal-HC-SR501-Infrared-Raspberry/dp/B00M1H7KBW) Female to female wires And followed the tutorial here: ...
0
votes
0answers
26 views

USB accelerometer options for the pi?

Im trying to minimize the time to prototype a device and I'm curious to know if there are any USB ways of connecting an inexpensive accelerometer to the pi ? If not then are there any ways to ...
4
votes
1answer
58 views

Is there a way to attach multiple serial port devices to a single raspberry pi?

I have three separate devices that all need access to a data serial port on the pi. My devices are an accelerometer, a GPS unit, and a GMS cell service chip. I've found tutorials on how to attach ...
1
vote
1answer
80 views

Connecting RF 433MHZ receiver to a raspberry pi 2

I'm pretty noob at electronics and Raspberry Pi. I'm pretty good at programming though (both ruby and python). I wan't to connect RF receiver to a Raspberry Pi, so that it can read signals from ...
1
vote
1answer
52 views

LM35 long electric wire [closed]

I want to measure temperature on Pi with LM35 sensor. I have cables like this it's 4 x 0.75mm^2 and the longest is about 10 meters. I can't change them to UTP. Is this gonna work on this cables or ...
0
votes
1answer
64 views

About Raspberry Pi mote in Contiki OS

I have started exploring Contiki OS. I have a tool named COOJA simulator in it to simulate sensor networks (Here, the sensor node is called "mote"). In this simulator where in we have many types of ...
5
votes
2answers
70 views

Sensor Question

I am following this tutorial: http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/temperature/. The problem is I don't have that specific temperature sensor on me. Since I don't have that specific ...
1
vote
1answer
35 views

Connecting a PIR sensor and a screen

I want to connect a PIR Sensor and an LCD touchscreen to my Raspberry Pi B+. However, it seems that they both use the same pins on the GPIO, which makes me unable to connect them both directly. What ...
0
votes
1answer
120 views

Connecting DHT11 sensor

I want to use the DHT11 sensor with my Raspberry PI 2 Model B. I'm using pin#01 for the VCC, pin#39 for GND, but I don't know which pin should I use for DATA? Should I enable some GPIO ports to use ...
2
votes
2answers
59 views

Any remote sensors for the Rasperry Pi?

I would like to build a temperature/humidity station with the PI, but I need several remote sensors to distribute around my house (crawlspace, attic, various rooms where I have plants, and yes, ...
2
votes
1answer
81 views

Overlay a plot of sensor readings on video output

I'm working on a project where I use a Pi + camera + sensors. I would like to use the picamera module and overlay a moving plot of the real-time sensor readings on the video output by using the ...
1
vote
1answer
381 views

DS18B20 not detected by Raspberry Pi

I'm trying to have a DS18B20 working with my Raspberry Pi Model B Revision 1.0, and it doesn't work. No matter what I try I still see nothing in /sys/bus/w1/devices/ besides: pi@raspberrypi ~ $ ls ...
1
vote
1answer
47 views

I2Cdetect doesnt detect my I2C device

I am using a BQ27441EVM-G1B. It is a TI battery fuel gauge board, that is used to measure the battery voltage, current and charge left etc. Datasheet - http://www.ti.com/lit/ds/symlink/bq27441-g1.pdf ...
0
votes
0answers
37 views

Why sensors malfunction using an external power supply?

So i have my raspberry 2 ready to read from a GPIO the outout of a motion sensor from parallax (PIR Sensor Rev B 555-28027)using the usb port from my computer. it works prefectly using the 5V or the ...
2
votes
0answers
46 views

Raspberry Pi sensor error with high CPU

I have a passive infrared sensor attached to a Raspberry Pi. Namely this model which has digital output in addition to the analog one so it can be attached directly to Raspberry Pi. The data pin is ...
2
votes
1answer
143 views

Multiple differential air pressure sensors using I²C bus?

I have an Exhaust Air Heat Pump (Nibe F470) and I would want to monitor pressure differential between incoming and outgoing pipes and pressure differential between the house and outdoor air pressure. ...
-1
votes
1answer
57 views

What sort of sensors can and can't be connected to the Raspberry Pi [closed]

I'm new to the Raspberry Pi so apologies if this question is basic. I would like to know if a sensor or bit of hardware has to be made to work with the Raspberry Pi or whether any sensor can be ...
1
vote
1answer
186 views

Vibration sensor - What I am doing wrong?

I am trying to use a vibration sensor with my Raspberry Pi. The wiring looks like this: 3.3V -> VIBRATION SENSOR -> LED (Grounded) -> GPIO6 Whenever I touch the vibration sensor, the ...
0
votes
0answers
50 views

Connecting Dallas 1-wire temperature sensor

I have Dallas 1-wire temperature sensor, and 10k Ohm resistor. Is it OK to use 10k instead of 4.7k? Because I'm having a problem that if I use this resistor, sensor gets really hot and Pi won't boot. ...
1
vote
0answers
205 views

Image Processing With Windows IoT Core

I am a Newbie to Raspberry Pi Windows IoT core, I wanted to create a system to detect total number of Chairs/Tables present in a room for business, I researched a lot, I had a few sites stating that I ...
1
vote
0answers
34 views

Power sensor 230 V [closed]

I would like to use a RPI to log when a heat pump is turning on and off. The pump is running on 230 V; what I need is a power sensor that can detect changes in voltage level and translate that to ...
0
votes
0answers
87 views

B+ DS18B20 sensor still not listed in Linux raspberrypi 4.1.7+

Firstly I have read many many comments in other posts, but I cam't solve my problem. :( I bought a DS18B20 waterproof sensor: I connected it correctly to my Raspberry Pi b+ and used 4.7k7 resistor ...
1
vote
0answers
90 views

Multiple sensors to I2C Bus [closed]

I want to connect multiple sensors to Raspberry's I2C bus. I know that can be done via connecting different sensors to different address bus. My question is how can we identify identify or assign ID ...
1
vote
0answers
33 views

Detecting which object was picked up even if misplaced in different resting spot [closed]

I was wondering if anyone has a solution to detecting which object was picked up. The PROBLEM, is that the objects can be moved around. In other words, if I have a stand with 10 objects, a customer ...
0
votes
0answers
35 views

How to detect specfic items?

I'm making a escape game and wish to create a shelf (or similar) such that the raspberry pi will execute some code only if the certain books are put on the shelf in the correct order. How may I go ...
0
votes
0answers
31 views

How can I get a Raspberry Pi to monitor a large number of Switches and Relays?

I have a raspberry pi, and I a significant number of relays in my house that I want to monitor. How can I use the Raspberry pi to monitor these relays, I do know a bit of electronic knowledge and good ...
0
votes
1answer
131 views

Sonar 3D Mapping

My friend sent me this link http://img-9gag-fun.9cache.com/photo/aYwPX47_460sv.mp4 it's interesting I had to give him that, I want to make something similar like that but to the Raspberry Pi. Problem ...
1
vote
1answer
158 views

Analog input with MCP3008

I'm trying to connect a Turner C-Sense pCO2 sensor to an RPi2B using an MCP3008 ADC. The probe is powered via dedicated 9V inverter. The probe's analog output wires include a signal out (+) and AGND ...
1
vote
0answers
115 views

Raspberry Pi 2 and DS1621

I am connecting temperature sensor, DS1621 with Raspberry Pi 2. Pin 5,6,7 and 8 of DS1621 is connected to 3.3V and pin 1 is connected to SDA, pin2 is connected to Clock and pin 4 is connected to GND. ...
1
vote
1answer
558 views

Getting YL-69 Moisture sensor to work and display analogue input

I'm new to the raspberry pi and after getting a simple temperature sensor to work bought a YL-69 (comes with YL-38 too) but can't get any analogue data from it. ...
0
votes
2answers
314 views

How many sensors I can connect to one breadboard ? (raspberry pi 2)

I'm a new user of raspberry pi 2. I'm preparing a school project and I wonder how many sensors I can plug in to my raspberry pi. I would like to connect 3 sensors: PIR sensor DHT22 DS18B20 ...
1
vote
1answer
50 views

Measure where someone is standing?

I have a camera with an API to turn and pan it. (Hangs from a ceiling so it can turn and pan every side) I want to use the Raspberry Pi to control the panning and tilting based on where a ...