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"No more addresses" when using multiple DS18B20 sensors

I want to build a scheme to get data from several DS18B20 sensors and write their temperature to serial. Before I connected them using parasite mode and using 2,7k resistor (because I didn't have 4,7k at home). Back then, it worked for 1 device, if…
serge1peshcoff
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DHT11 and DHT22 unused pin

The DHT11 and DHT22 is a 4 pin temperature and humidity sensor, where one of the pins is labelled as NC (not connected). I'm curious what the unused pin is used for. Factory calibration?
Mike Causer
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Nokia32/RCMM IR decoding issues

I am trying to decode the IR signals from a remote. I'm using an Arduino Pro Micro, and a TSOP38238 IR receiver. I found out that the remote uses the Nokia32(RCMM) protocol, and I have been able to partially decode it using cyborg5/IRLib…
Duom
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Is it possible to create a standalone exe which can burn the code into a Teensy 3.1?

So here's the scenario. I have sent my teensy 3.1 circuit to a client of mine And now I need to update the code burned onto teensy without providing client access to the code So is it possible to create an exe or an installer of a kind which on…
newbie2015
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How do I convert code between Arduino platforms?

What documentation is available regarding the differences between the different Arduino platforms? For example, I have some code written for an Arduino Teensy that I would like to run on an Arduino Mega. Is there documentation on the capabilities…
Mark Harrison
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4 answers

How to connect more than 10 sensors to Arduino uno r3

How I can connect more than 10 sensors to Arduino Uno R3? I calculated it and I can connect just 4 fire flame sensors (sensors which can find a fire (a candle, for example)) and maybe 1 ultrasonic sensor. I need more for my project. I need an IR…
Mr. Robot
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Is there any way I can turn off the 5V pin?

I'm trying to find a way I can toggle the 5V pin to turn on/off. I want the voltage to pass to another wire at a certain point. It should be off and then when something happens, the 5V should turn on. How can I do this?
ninesalt
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Trouble with Timer 0

I'm taking my first wobbly steps outside the Arduino IDE and I'm not having much success with timers / interrupts. I can set a pin to output and light an LED with registers fine but I cannot for the life of me get it to blink using a timer. I have…
Ashlyn Black
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I²C with ATTiny85 at 8MHz using TinyWireM library

Hello fellow Arduino enthusiasts, I am trying to make the ATTiny85 talk I²C with a MMA7660 breakout board I have (it's an accelerometer, this is a follow up question to my previous one). I would state in advance that the I²C chip works perfectly…
Omer
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Arduino power sources

Is it safe to connect a USB input to an Arduino (Nano) at the same time as an external regulated 5V supply to its 5V pin is connected, assuming the supplies have common grounds ? Will (I hope) the external 5V be used so as to not draw too much…
Robert Murphy
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Read RC receiver channels using Interrupt instead of PulseIn

I am designing my own quadcopter control algorithm, whereby I currently read 4 RC receiver channels using PulseIn on each loop in the following manner: ch1_raw = pulseIn(rcPin1, HIGH, 25000); In other words, ch1_raw contains the length of a HIGH…
RLJ
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How to confirm a pin is fried

How do you confirm a pin has been damaged and is unable to work as a digital input? I tried detecting a pushbutton (connecting ground to pin 11 with a pullup resistor enabled) on a fresh Arduino Uno and digitalRead() always registers 0, regardless…
Cerin
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HDMI EDID emulator

I am working on a project where i emulate the EDID of a screen to force a source into sending data on a certain resolution. I read the original EDID code of a screen and change the timings into the resolution I want to force the source in, i send…
CedricGr
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6 answers

LCD 16*02 I2C shield only shows first character printed

I have an I2C LCD screen provided with a Sunfounder kit and certainly built by DFRobot or such a constructor (there is nothing written on the LCD), and an Arduino Uno R3 copy. My issue is when I use lcd.print() to write a string on the LCD, only the…
AFract
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One workspace, two IDEs - Possible?

How can I create a workspace & projects so that either the Arduino IDE or the EclipseArduino IDE may be used to develop the project, interchangeably? I have both IDEs installed and working but in separate workspaces. I need: One workspace that…
JRobert
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