All Questions

3
votes
0answers
830 views

Arduino Uno doesn't work as Manchester code receiver

I'm sending some data from ATTINY85 to Arduino UNO using 433Mhz modules. Coding is Manchester using Manchester.h library from here. Transmitting data works perfectly, 433 receiver gets data alright. ...
3
votes
0answers
794 views

Arduino Mega2560, Ethernet Shield & OV0706: “Camera not found”

I want to make a picture with the OV0706 that saves the picture to the SD card. I'm using the Arduino Mega2560, Ethernet Shield (with SD slot) and the OV0706 (this one: http://www.aliexpress.com/item/...
3
votes
0answers
460 views

Connecting Mac to Adafruit Feather 32u4 Bluefruit LE over serial

The Adafruit board connects fine over USB serial, and fine over Bluetooth to a mobile app, but it will not connect to a Mac serial monitor over Bluetooth. Is there any way to use the Adafruit's ...
3
votes
0answers
1k views

Converting Arduino Uno with Ethernet Shield sketch for Arduino Yún

I'm new to the Arduino Yun and I'm trying to convert a sketch written for the Arduino Uno with a Ethernet Shield. The sketch does HTTP posts to Azure Mobile Services. I've added in the Bridge.h and ...
3
votes
0answers
4k views

Using SD card shield on Arduino Due

I have a Seeed Studio SD card shield (V3) that I am trying to use on my Arduino Due. I am having trouble using the SD examples that come with the Arduino IDE. They worked fine on my Arduino Uno by ...
2
votes
0answers
35 views

Cannot POST to server. HTTP code -1. NodeMCU

I am trying to make a POST request with NodeMCU, but I get a HTTP status code -1. Code: #include <ESP8266HTTPClient.h> #include <ESP8266WiFi.h> #ifndef STASSID #define STASSID "Wifi" #...
2
votes
0answers
68 views

Can't connect to my ESP32 board via serial

I'm completely new to electronics work. Today I've received the ESP32 board that I ordered. (It's a WROOM-32.) I followed the instructions here. I connected the board to my computer via USB and I ...
2
votes
0answers
38 views

Problem in integrating speed sensor LM393 with L298N

I am currently working on a project that has an automatic support wheel for bicycle. The mechanism of this project is when the speed sensor is detecting the RPM of the rear bicycle wheel it will ...
2
votes
0answers
94 views

Measuring Amplitude/Frequency of sound

I need to read an analog signal at about 500-1000Hz for at least 5 seconds. I've a battery powered microphone wired into an analog and ground pin on my arduino and am trying to measure the frequency ...
2
votes
0answers
49 views

What does “Update of OCR1x at” mean in the WGM table of ATMEGA328?

I just finished a reading a couple of online guides on how to use timer registers with pulse width modulation, so I'm still new to its concept. When I looked in the ATMEGA328 specification sheet, I ...
2
votes
0answers
136 views

TRIAC Pulse driver for Spot Welder (help needed with programming)

I have designed and built a transformer driver board for my spot welder. It is powered from mains electricity (230 V) and consists of the following segments: triac drive and protection, zero cross ...
2
votes
0answers
114 views

Fail using OTA - Network ports

I was using OTA to upload sketches to ESP ports I have ( around 10 ESPs). For some time now - I'm having some kind of a trouble I would like to share, since I've read some similar topics, but all didn'...
2
votes
0answers
184 views

How to use SPI to set/ read registers for a sensor (Avoiding need for Github Lib)

Ok so as some readers might have seen, my current project involves using MPU's. The idea is sending data via CAN bus to a controlling MCU to then send to a raspberry pi to perform the calculations ...
2
votes
0answers
212 views

Prevent Arduino IDE from rebuilding the core library after every restart

I have an Arduino IDE 1.8.5 setup (installed from the ZIP file) which I use to work exclusively with a single board. Every time the IDE is restarted, the first compilation takes much longer than ...
2
votes
0answers
2k views

How to listen to multiple server ports with ESP8266?

I'm using WeMos D1 R2. I'm trying to listen to both ports 1992 and 1993. This is my current code: #include WiFiServer server_1992(1992); WiFiServer server_1993(1993); void setup() { Serial....
2
votes
0answers
589 views

Wake up ESP8266 with multiple GPIOs

I am building a ESP-07 based IOT device, that detects the status of 4 doors. The device must connect to WiFi and send an http request, when 1 of 4 doors is opened. I want to place a reed switch, for ...
2
votes
0answers
874 views

A4988 Vref too low

I'm driving a stepper rated at 5V/1.7A using an A4988-based driver circuit with a 12V power supply. An Arduino controls the stepping sequence. According to the datasheet for my A4988, I should be ...
2
votes
0answers
320 views

Is it possible to put ATtiny85 to sleep while using TinywireS?

I have an arduino uno as the master I2C device talking to an ATtiny85 as the slave. What I want to do is have the Attiny85 receive a message from the UNO to tell it to power off which will then ...
2
votes
0answers
259 views

How can i change by esp8266 baudrate, as I accidentally changed the baudrate to something else(which I dont remember)?

//In order to connect, SoftwareSerial esp8266(2,3); // the TX pin of esp8266 is connected to pin 3 of // arduino uno and RX pin is connected to 2 // we need to pass baud rate to begin ...
2
votes
0answers
3k views

Why is Wire.onReceive() called during requests?

I'm building a complex I2C-based networking protocol and have noticed that the Wire.onReceive() handler is called both for I2C read and write operations. When the master writes to the slave, it is ...
2
votes
0answers
675 views

Cant open serial monitor on linux

I have a pro micro and I'm running the IDE on linux. The IDE easily recognises that my board is on /dev/ttyACM0 so i can flash programs on to it. I am testing the following code void setup() { ...
2
votes
0answers
1k views

Converting between NEC and HEX values from IR receiver

I jacked one of the IR receivers from my LED strip and hooked it up to my ESP8266 NodeMCU (running Arduino code). I found a great library called IRremoteESP8266. With this library, I can basically ...
2
votes
0answers
168 views

Scheduling and BLE Read on demand

I'm building a data logging device with BLE capability using RFduino. Sensors are read using timer interrupt to a buffer. When the buffer is full, then the whole buffer is written to SD card. At the ...
2
votes
0answers
99 views

Problem with coding

Recently I got this code from a friend which is unfortunately unavailable right now. When button is pressed two halfbridges are supposed to change directions with increasing frequency of direction ...
2
votes
0answers
450 views

Arduino nano clone problem with interrupt on falling edge on pin 2

I've s 1Hz square wave coming from a DS1307 SQW/OUT pin going into pin2 on the Nano that is set up as input with internal pullup enabled. I've set up the interrupt on falling edge but I can't get the ...
2
votes
0answers
241 views

Software flashing attiny167 from RPi with avrdude

I am trying to flash a program onto an attiny167 (already bootloaded with the micronucleus bootloader) with a Raspberry Pi via avrdude and USB. Background I have 50 Raspberry Pi 3B's connected to an ...
2
votes
0answers
91 views

How do I Continuity Test/Troubleshoot a Linksprite RS232 V2 Shield?

I have a Linksprite RS232 v2 adapter (which uses a MAX232 chip), as per this image. I have soldered on the headers and tested the pins to make sure there are no solder bridges. I have set the jumpers ...
2
votes
0answers
408 views

Do software SPI read from a register using shiftin()

How to read from a register using software SPI, presumably shiftin()? It works using the builtin SPI library + hardware SPI. I seem to be able to write but not read using manual shiftin()/shiftout()...
2
votes
0answers
217 views

Arduino UNO WiFi RestServer returning “not found”

I'm trying to run RestServer on my Arduino UNO WiFi, and I'm currently using the tutorial from Arduino: http://www.arduino.org/learning/tutorials/boards-tutorials/restserver-and-restclient Everything ...
2
votes
0answers
1k views

How can I connect an arduino to a raspberry pi via an HC 05 bluetooth module and transmit data?

I am currently undertaking a project where I am attempting to build a bluetooth thermometer using an arduino. I have the temperature sensor working and returning temperature readings via a usb ...
2
votes
0answers
8k views

UART from Arduino to NodeMCU

I'm trying to connect an Arduino nano to a NodeMCU 1.0 via the hardware UART, in order to send information one way from the Arduino to the NodeMCU (and from there to the network). I'm connecting the ...
2
votes
0answers
439 views

Using CLion as Arduino IDE — Cannot find Libraries

I'm having a problem using CLion as Arduino IDE when integrating 3rd-party libraries: Here is the CMakeList.txt cmake_minimum_required(VERSION 2.8.4) set(CMAKE_TOOLCHAIN_FILE ${CMAKE_SOURCE_DIR}/...
2
votes
0answers
166 views

Arduino Due SAM3X ADC programmable input offset not working

In the datasheet of the SAM3X8E in Section 43.6.9 Page 1327 it clearly states that the SAM3X/A has a programmable offset for ADC input in Single-Ended mode and I believe that the Atmel ASF library ...
2
votes
0answers
3k views

MKS GEN board pinouts for Arduino MEGA

As per this SO: Is the MKS GEN V1.2 compatible with Arduino IDE as Arduino MEGA Board? the MKS GEN board is an Arduino MEGA board mixed with other circuits. My questions is how does it correlate ...
2
votes
0answers
196 views

DHT22 reading weird values

I just hooked up a DHT22 I had laying around in a parts drawer to test something and it is giving out some crazy wrong values, I am running the adafruit library's unified example and this is the ...
2
votes
0answers
414 views

Slow response from ENC28J60

I am making a circuit which turns a LED on and off through internet. I am connecting an Arduino to a LED and to an Ethernet controller(ENC28J60), but when I make a GET request to the device, it takes ...
2
votes
0answers
435 views

Options for turning on/off an output at a specific time?

I am building a night light that will turn on when it detects motion using a Passive Infrared (PIR) sensor. I only want the light to turn on overnight, between specific hours that I specify. Outside ...
2
votes
0answers
967 views

Read string from DigiUSB

I wrote simple code for my Digispark (Attiny85 with Micronucleus bootloader) in Arduino IDE: #include <DigiUSB.h> String inst; void setup() { DigiUSB.begin(); pinMode(1, OUTPUT); } void ...
2
votes
0answers
359 views

Can't reprogram atmega328p chips using nano as ISP

Using nano clone as an ISP on a breadboard- as shown here - http://www.martyncurrey.com/arduino-nano-as-an-isp-programmer/ Previously, it worked great. However, recently, chips that I have ...
2
votes
0answers
38 views

Multiple MuxShield 2's connected to a single Arduino Mega

I am working on a project and need alot of toggle buttons to control various things around the house. I connected 5 MuxShield 2's to my Arduino Mega. The first two will serve as inputs and the last ...
2
votes
0answers
409 views

ArduinoDue - Matlab: SerialUSB.write() sends ASCII?

I'm trying to get some binary data from an Arduino Due to Matlab. Basically this is the setup: Due: byte usbMsg[33]= {0}; // filled with dummy as example usbMsg[1] = '00000001';// in[3]; usbMsg[2] ...
2
votes
0answers
308 views

Is Arduino WiFi101 library fully compatible with Arduino MKR1000 with WiFi HW?

Will all the classes in this library work with the MKR1000 with wifi hardware? The guide mentions "wifi shield". So, does the library work exactly the same with the Arduino MKR100 (with the onboard ...
2
votes
0answers
384 views

Nordic nRf905 (433MHZ) with arduino receive garbage data

I am interface Arduino with nRf905 in receive mode use 433 MHZ. I Have follow this link http://www.electrodragon.com/w/NRF905_Transceiver_433MHz-Wireless_Module. And for transmitter, I am use RF-...
2
votes
0answers
512 views

Camera VC0706 not found

I tried connect my Arduino Uno R3 with module camera VC0706 following this instruction of Adafruit: https://learn.adafruit.com/ttl-serial-camera/using-the-camera. [VC0706] --- [Arduino] Vcc --- ...
2
votes
0answers
345 views

Arduino WebSocket Client “Connection Failed”

I use this code to connect Arduino MKR1000 to API through Web Socket, but it didn't connect to the server. Can any one help me to correct the code. This is the Arduino code: #include "Arduino.h" #...
2
votes
0answers
366 views

Problem in using COZIR W-100 with arduino

I was using the COZIR W-100 carbon dioxide sensor with an Arduino Mega 2560 with the example code from this site. But the measured value of carbon dioxide by sensor was 90 ppm in fresh air and that ...
2
votes
0answers
522 views

RFID Code (and setup) works on an UNO but not on the Yun

We're using two RDM6300 RFID readers for this, and the code works when plugged into an UNO, but not when connected to the Yun. We have one of the rfids plugged into the rx pin (0 on the digital side) ...
2
votes
0answers
2k views

avrdude/stk500 protocol error

I'm running into a bizarre problem. I've got a custom board using an Atmega328P, running off the internal oscillator. From Atmel studio, I've successfully uploaded the standard optiboot bootloader (...
2
votes
0answers
783 views

GPRS/GSM SIM900 Shield not working with Arduino

I have a few questions related to GPRS/GSM SIM900 Shield not working with Arduino. To keep it short I have a list of concrete questions: Is the Arduino GSM library compatible with the Geeetech GPRS/...
2
votes
0answers
5k views

Arduino GSM receiving text and then storing value as a variable in code

I am using an Arduino Mega board with a SIM900 GSM. My goal is to be able to text the GSM with a value of two digits (ex: 79) and then store that value as a variable in the code. I know how to set ...

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