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Why were Atmel MCUs used for Arduino?

Atmel microcontrollers are not cheap compared to STM and Microchip. Why did Arduino select Atmel MCUs such as atmega328 and atmega2560 on their board out of so many alternatives?
user768421
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Using / calibrating pH sensor module

I've bought this sensor module board to link to an Arduino nano: http://www.ebay.com/itm/For-Arduino-Liquid-PH-Value-Detection-detect-Sensor-Module-Monitoring-Controller/321764233326 I assumed the two screws were for calibration (low point + slope),…
Jasper
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3 answers

Humidity values returned by DHT22 sensors failing after some time

I've built a weather station using Arduino that measures temperature/humidity and pressure using an Adafruit 8266 HUZZAH. Temperature and Humidity are measured using a DHT22 sensor a ordered from AdaFruit. The project was completed about 4 months…
Stanley
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esp8266 garbage out only when using SoftwareSerial

I'm trying to operate the esp8266. When I connect RX+TX pins to pins 1+2 on the Arduino, everything works fine. but when I'm trying to use software serial all hell breaks loose and the recieved data is garbadeged (It seems like everything is ok but…
Mercury
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Problems connecting reliably using HC-05 (as bluetooth master)

I currently try to connect an Arduino Micro/Leonardo/32u4 to an ELM327 Bluetooth dongle using a HC-05 Bluetooth shield from iTeadStudio. I also have similar problems trying to connect to a bluetooth dongle (with added serial connection) on my…
Thomas S.
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3 answers

Decoding IR codes with IR sensor rather than IR receiver module

I'm looking for a library to decode RAW IR signals from an IR sensor (looks like a black LED, two legged) rather than an IR module (3 legged, rated for a particular frequency - such as 38kHz). Is there a library that supports IR sensors? A picture…
omribahumi
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2 answers

Basic Serial Transmission Protocol

I have a small piece of code here that I hope to run on Arduino. Basically what this code is doing is, it takes a nibble from the user, appends a startbit to it, and transmits the code through a transmitter module. The receiver end receives the bits…
Jonathan
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Arduino Analog Input Oscillating

I'm making a simple Infrared detector using a thermopile. I have a few extra capacitors than what that schematic says. I'm currently following another, but this is the gist. Schematic and Breadboard- I can add breadboard picture if needed. I don't…
Luke
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3 answers

Sending a value from one arduino to another

I wonder if it is possible to send a value from one arduino to another. Basically, I have one arduino measuring let's say weight, but I want to display that value using an lcd in another arduino. Is it possible to send the value to a pin using…
Camilo
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How to make an electronic suction cup?

The uArm is a robot arm with a suction cup (or gripper). I'd like to try to make just the suction part of it, and I'm wondering what components I'd need? By the looks of it, I'd need a hobby vacuum pump, but these seem few and far between on UK…
Danny Beckett
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1 answer

Can a PC connect to an Arduino for serial communication without installing the entire dev kit?

I'd like to send a prototype board to a friend pre-programmed and wired. Ideally they should just need to plug in the USB and connect to it over a serial COM port. With another laptop I used for testing I had to install the full dev kit, sketch…
asawyer
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How to make XBee module interrupt/wake arduino

What I am trying to do is, to have arduino in low power mode and waking up only when a packet is received and is available to be read from the buffer. A scenario : Zigbee XBee module is not receiving anything, arduino is asleep. Once this…
user1392
5
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2 answers

Using multiple laptop battery packs to power everything

I'm working on a medium sized robot project with multiple arduinos to control stuff. I've been planning on using a lead-acid battery pack, but then I was given 10 working and identical Asus laptop battery packs rated at 14.8 V 4400 mAh, and one old…
frodeborli
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2 answers

Protocol options for data exchange between Arduino and ESP8266

I have a device built with an Arduino uno: Arduino software installed on an Arduino uno can be controlled via serial commands can be controlled via physical buttons and sensors on any button/sensor state change it writes the current state to…
vlad b.
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How to differentiate between 2 Micros on Linux

I have 2 Arduino Micro based devices that I want to use on my Ubuntu Linux machine. I need them to have unique serial ports. Unfortunately, both have the same serial number which makes identification through udev rules difficult (if not…
Ben
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