Questions tagged [arduino]

For questions pertaining to the Arduino microcontroller and it's integration with Raspberry Pi projects. Questions about Arduino only are off-topic and can be asked at Arduino Stack Exchange.

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10 views

reading EMG on Rpi3 using Teensy 3.2 on usb serial

We are using MyoWare EMG sensor and reading the RAW EMG pin as well as filtered SIG pin on the board. What it basically does is sends an analog value as a fraction of the input Voltage, which in this ...
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1answer
37 views

Peculiar features of I2C communication between RPi and Arduino

I am currently trying to establish two-way communications between an Arduino Leonardo and a Pi model B using the I2C bus, as slave and master respectively. Spookily, the Pi can successfully send ...
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2answers
49 views

Can I drive a custom LED matrix from my Pi

I have an idea for a project, but I am unsure of the best route to take. I am going to create a custom 11x10 LED matrix (addressable LEDs like WS2812) with the intention of lighting up certain LEDs ...
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1answer
43 views

I2C Communication between Arduino and RPi failing when Arduino is sending data

I'm trying to read some data from the Arduino slave and when I receive the data it shows some numbers but not the correct ones. I'm using node and i2c-bus module, also tried with wiringPi but got the ...
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1answer
32 views

How can I reproduce arduino's shiftOut( ) fonction on a raspberry pi 3+ in C langage?

Can someone help me to reproduce arduino's shiftOut( ) fonction on a raspberry pi 3+ in C langage? Preferably using bcm2835 library.
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1answer
39 views

Serial Communication of <raspberry pi zero w> with <arduino nano>

Background I'm trying to control some motors by raspberry pi zero w. I did, but the PWM produced by Software was unstable. So I decided to use arduino uno with zero. (Zero is required because I ...
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1answer
88 views

How to send and read a string from Raspberry pi to Arduino via serial interface?

I was trying to send and receive data between Raspberry pi and Arduino UNO. I'm able to send and receive a string from Arduino to Pi using Serial.println. I spent hours searching a better tutorial or ...
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1answer
248 views

How to get Data from Rasperry to Arduino?

Id like to get a simple integer from my pi over to my Arduino (live, so while both are running and with Minimum latency), but I cant use any Pins because im already using all of them because I use a ...
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34 views

USB com port Assignment

When the Raspberry pi boots up, it looks for the Arduino connected serially. I have a udev rules that finds the USB port Arduino is connected. This works just fine. In the program I am bit-banging ...
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2answers
34 views

Raspberry Pi and Arduino Due Spi

Is there any way to establish SPI communnication between Raspberry Pi 3B + and Arduino Due. Both only support master mode. I tried to google but mostly answers from 2013 come up. Has there any recent ...
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25 views

Raspberry Pi3 not receiving HTTP request from Arduino

I have been running an application on an older original Raspberry Pi. The Raspberry Pi was running Incredible PBX and I have some tables set up in the MySQL database to store data received from an ...
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1answer
29 views

Incorrect i2c read bytes

NOTE: Please read the bottom. There's a plot twist. I'm reading three bytes and my NodeJS code reads 3, 192, 144 in decimal while my logic analyzer reads 0x03, 0xC0, 0x10 which translates to 3, 192, ...
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1answer
51 views

Arduino slave initiating an I2C transmission to Raspberry Pi master

Is there any way for an Arduino slave to send a byte array to the raspberry pi master without the master having called on it?
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2answers
38 views

ARDUINO Code in Raspberry Pi 3

I'm new with this kind of projects and I'm trying to do my graduation project using Raspberry Pi 3 and vibration sensors. The sensor is Piezo LDT0-028K and I'm using ADS1115 to convert analog to ...
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1answer
119 views

Serial Communication from Raspbian using Python to Arduino

In Terminal its working but not working using python code. My Code: import serial from time import sleep ser = serial.Serial ("/dev/ttyS0") while True: received_data = ser.read() ...
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20 views

How to read voltage data from arduino nano (slave) using i2c communication

python code: import smbus import time bus = smbus.SMBus(1) SLAVE_ADDRESS = 0x10 def requestreading(): # try: # # b1 = data[0] # b2 = data[1] # b3 = data[2] # ...
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2answers
345 views

Serial to Arduino totally non-responsive

I'm trying to connect my Arduino to my Raspberry Pi using the GPIO pins. I understand that the Pi uses a 3.3V signal while the Arduino uses a 5V signal so I bought a bi-directional logic level ...
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2answers
292 views

Unable to install Arduino 1.8.9 on raspberry Pi 3B+

Im trying to install the arduino IDE on my raspi. I am using the .tar from the website to get the last version (Linux Arm 64b) I tried from interface and from the terminal, in the opt or in the usr ...
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1answer
52 views

Serial comms to Arduino unexpcted behaviour

R Pi 3 B+, Arduino Mega 2650 I am trying to send motor control instructions via user input from the Pi to the Mega. Pi side code... import serial port = "/dev/ttyACM0" rate = 9600 s1 = serial....
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1answer
63 views

Home System with Raspberry or Arduino?

I am sketching a wireless system for my house to handle: from 4 up to 10 magnetic/pir sensors thermostatic sensor + display and 3 buttons (on/off heaters and up/down threshold temp) change the actual ...
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1answer
51 views

Mapping Arduino pins to Raspberry Pi pins

I am following instructions on wiring an LED screen to an Arduino. I have a Raspberry Pi 3 Model B, so I am having to "interpret" the instructions. I'm stuck on a step where the instructions say to ...
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0answers
109 views

RPi camera OCR,and save output in variable (pyhton with tesseract)

I want to make a python code for the raspberry pi, with the tesseract OCR engine, that it keeps reading text from the camera in realtime, saves in a variable, and sends output to Arduino. Is there a ...
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39 views

Raspberrypi 3b+ interface with Voice recognition module V3.1

I have write program for Voice recognition Module V3.1 and Raspberrypi 3b+ , but my problem is I am not able to write any of my voice command on voice module when I speech my command its not return ...
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2answers
69 views

Is it possible to compile and Arduino Sketch into a C++ file to run on Raspberry Pi?

Since Arduino uses C++ for its programming with libraries that are specific to Arduino, is it possible to compile your sketch and have it run as a C++ program on a Raspberry Pi? I saw there was ...
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1answer
28 views

Breadboard / Jumper Cables Instead of Arduino Uno Shield

I have the following hardware that mounts on top of Arduino Uno: https://www.cooking-hacks.com/documentation/tutorials/control-hvac-infrared-devices-from-the-internet-with-ir-remote/ I need to ...
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50 views

Send IP packets between two Arduino or two Raspberry boards

I have two Arduino boards and I want to do a small project with them. I want them the do the following: Firstly, I want to send an IP packet through the network from the first Arduino to the other. ...
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16 views

Is it possible to use Adafruit's Arduino libraries for my Raspberry Pi alone? [duplicate]

I have a MPR121 touch sensor, LSM303DLHC accelerometer & magnetometer, & SSD1306 128x64 display, and I don't have a Arduino.
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1answer
104 views

I2C Level Shifter 3.3V Raspi 5V Arduino Mega

I am connecting RasPi (Master) via I2C with Arduino Mega (Slave). Do I need a level shifter for this or is it non compulsory? As of now my code runs for some time before I get a Remote I/O Error ...
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49 views

I2C Raspi (Master) Arduino Mega (Slave) creating a csv File from sensor values

i am trying to connect raspi 3 (master) with an Arduino Mega (slave). I have 4 analog sensors on the on the Arduino Pins A0 - A3. I now want to be able to manually start and stop the readings from ...
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1answer
96 views

How to control Arduino Uno using Raspberry Pi after image processing is done?

I am working on a project which is basically a robot car to collect garbage after the image in front of it is determined as Garbage (image processing using Raspberry Pi). I want my car movements to be ...
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1answer
53 views

Serial read from arduino not working properly

I am trying to read analog read from ardunio connected to my raspberry pi. Following are my raspberry pi and arduino codes. Raspbery pi: import time import serial ser = serial.Serial('/dev/ttyACM0'...
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43 views

arduino to raspberry pi serial communication getting wrong result

am trying to get the heart rate bpm from Arduino to raspberry through the serial communication. #define USE_ARDUINO_INTERRUPTS true #include <PulseSensorPlayground.h> const int PulseWire = 0; ...
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1answer
44 views

Raspberry pi + L298 H bridge motor speed reduced when battery circuit shows 50%

I made a raspberry pi car. The pi is powered by two 18650 (Breewell New Multipurpose Flat Top 18650 Battery 2000 mAh 3.7 Volt Lithium Genuine Rechargeable Battery -Pack of 2 https://www.amazon.in/dp/...
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37 views

Is there anyway to use raspberry pi to control an air compressor driving a hydraulic press?

I have a 20 ton shop press that I would like to automate to have certain run settings at a certain psi for a specific amount of time. For instance if I wanted to press something at 140 psi for 3 ...
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2answers
465 views

RPi to Arduino I2C block_data read fails with “Errno 121, Remote I/O error” (Python3)

Folks, I cringe to bring this up as it has been discussed frequently, but I am at a loss. Background: I have a Raspberry project with about 3000 lines of Python3 code and want to add a wireless ...
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2answers
315 views

Protect raspberry i2c pins with general ground connection with Arduino

I have connection like on the screen I have 12 arduinos. Each of them has one general 12V power supply. The problem is when i connect one of the Arduino supply (while all scheme works) Raspberry pi ...
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1answer
89 views

Weird output on python IDE terminal

I am trying to get my Pi 3 communicated with arduino but am getting output which i can't understand. My arduino code: char dataString[50] = {0}; int a =0; void setup() { Serial.begin(9600); ...
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1answer
151 views

Convert C code to python for 16 bit CRC check

I have some C code running on my Arduino that does a CRC calculation. I can't get it to work on Python with my RPi. I suspect it's because the Arduino is using a 16 bit unsigned integer and RPi is ...
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1answer
108 views

RPI as server for home automation

I would like to ask for an advice in choosing controller/platform for my project. Basically what I want to do is RPI local server with web server, where I can display data from arduino sensors and ...
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1answer
149 views

NRF24l01+ Arduino to Raspberry - Receving working randomly [closed]

I am using a Raspberry Pi 3B+ (RF24 lib) and Arduino Mega (RF24 lib) I have cleaned the pins and soldered a 10 uF capacitor between vcc & gnd The distance between the two modules has no effect. ...
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0answers
57 views

Trying to use pigpio wavechains to drive very specific acceleration and deceleration

I'm working on a kinetic sculpture that involves a large pendulum swinging perpetually left to right. I'm using a raspberry pi 3 B+ / arduino uno with a DM860AC to control a nema 34 stepper. I was ...
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2answers
120 views

Arduino sensors without board directly on Raspberry Pi

I'm a beginner, just so you know. Okay, I've a Arduino IR Infrared sensor right next to me, some jumper cables and a Raspberry Pi. My question is: Do i need an Arduino board to hook the sensor up to ...
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1answer
517 views

How to use an ultrasonic sensor with nanpy on Raspberry Pi?

I have been trying to run the following code on a Raspberry Pi, to use the ultrasonic sensor HC-SR04 with an Arduino that is a slave to a Raspberry Pi: from nanpy import ArduinoApi from nanpy import ...
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522 views

How many arduinos can I control with one raspberry pi 3 B+

I have been reading about using a Raspberry Pi to control an Arduino. My goal is to control several Arduinos using a single Raspberry Pi, in order to automate several tasks, it is important to note ...
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0answers
58 views

Rasperry Pi and Arduino echo over USB

I am trying to create an "echo server" with Arduino UNO, so that user could send some message to it through Raspberry Pi and receive the same response. On Pi I am using Python and PySerial library to ...
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2answers
701 views

Incorrect Encoder tick counts using Raspberry Pi

Hi I have a DC motor with encoder which has a PPR count of 990 (No load RPM = 107). However, I tried to read the number of ticks (on a Raspberry Pi 3B) by rotating the wheel 1 turn and I get a PPR ...
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0answers
313 views

sample rate of ADC with raspberry pi and arduino

I connected the ADC PCF8591 to the raspberry pi3 and the number of samples per second is about 80. When I connect this ADC to Arduino, the number of sampls per second with baud rate 9600, about 270 ...
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0answers
257 views

Wireless Gyro/Accelerometer Sensors for Raspberry Pi

Is there a way to have a wireless gyro/accelerometer sensor connected to Raspberry Pi? Have worked with single MPU-6050 in the past. Was wondering if there was a way to have a wireless sensor instead....
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1answer
277 views

Rubbish Values (b'\x00\x00\x00 … ') - UART of Arduino to RPi 3B

I am getting b'\x00\x00\x00 ... ' together with the data I want. For example, my Arduino is writing 'hello raspberry' to RPi. At the RPi, it receives 'b'\x00\x00\x00 ... hello raspberry\r\n '. Why? ...
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1answer
197 views

Serial connection with raspberry pi to arduino, works only once and needs a hard reset every time

so I am working on a project where I have to connect an arduino to the raspberry pi through serial and then transfer the input from the raspi to another I2C device. So, just to test things out and ...