Arduino Weekly Newsletter - Wednesday, January 27, 2016

Arduino newsletter

Top new questions this week: List of Arduino board preprocessor #defines When one selects a board within Arduino IDE, a preprocessor definition is added to one of the behind-the-scenes files. After a lot of hunting and some good fortune I found that the format of this ... ide c-preprocessor   asked by CharlieHanson 5 votes answered by Mikael Patel 3 votes ArduinoMEGA: 64 digital inputs cause random digitalRead values I have 64 hall effect sensors (magnetic field sensors) (DRV5023AJQLPG) connected to an Arduino MEGA 2560. For that, I use 48 digital pins and 16 analog pins as digital input pins. The program in the ... arduino-mega sensors current digital-in pull-up   asked by Edo Paulus 4 votes answered by Jake C 1 vote How to use Multiple MPU9250 to Arduino Lilypad Is it possible to connect more than one or to be specific 5 MPU9250 into 1 Arduino lilypad? How will I set the addresses, and where should I put the pins for SDA and SCL? I hope someone out there ... arduino-mega accelerometer gyroscope magnetometer   asked by Thomas 3 votes answered by Nick Gammon 2 votes Arduino Due: Interrupt-based ADC hangs processing I am trying to build an oscilloscope using an Arduino Due and an LCD. I have the LCD running perfectly and started working on using the ADC peripheral to sample signals. Here's what I have so far: ... arduino-due interrupt adc analog-sampling   asked by Alex 3 votes answered by jwpat7 3 votes Precision voltmeter using arduino I am newbie, I need to measure precise voltage in range 0.00-0.80, two digits precision. The voltage will not be greater than 1V-1.2V. I wonder if I need divider or not, I am sure that voltage ... arduino-uno arduino-nano analogread voltage-level   asked by solderingiron 3 votes answered by Majenko 3 votes Processing Serial data I have a PM10 sensor that I'd like to get the values from. Here's the official documentation from the sensor: I've looked as serial communication, but how do i process byte by byte of information ... serial sensors   asked by R0b0tn1k 3 votes answered by Majenko 4 votes Why is my Adafruit motor shield not spinning my motors? I'm using the Adafruit Motor Shield v2.3. I'm powering the Arduino with a USB cable and I'm powering the motor shield with a 9 volt battery. I removed the vin pin, and I'm using this tutorial/code to ... arduino-uno motor adafruit arduino-motor-shield   asked by Pikamander2 1 vote answered by Jake C 2 votes Greatest hits from previous weeks: Mac OSX Yosemite no serial ports showing for Uno R3 I have a MacBook Pro running OS X Yosemite (10.10.3). I connected my Arduino UNO R3 to my computer for the first time after the Yosemite upgrade - it worked fine before this! When I opened the ... arduino-uno usb   asked by revive 6 votes answered by cnanders 3 votes Arduino Nano uploading gives error: avrdude: stk500_recv(): programmer is not responding I have a Arduino Nano (Sainsmart) that I'm trying to upload a sketch to. Under the Arduino IDE, the device selected was Arduino Nano w/ ATmega328. However uploading the sketch gives me the error ... programming serial uploading sketch arduino-nano   asked by Nyxynyx 5 votes answered by microtherion 1 vote Can you answer this? Arduino throwing error while using modbus RS485 code I have been trying to make a communication with my industrial drive. All I want to do is read a few values of drive, like current, voltage etc. For that I am using a library: I don't understand why ... arduino-uno c rs485 modbus   asked by user16682 1 vote

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