What pins to use for I2C bus with AVR Mega2560 - Arduino Forum
May 14, 2012 · Documentation seems to say that I2C bus uses pins 20 and 21. In Mega. However in the schemati I2C bus seems to be on pins 43 and 44. What are the correct pins to use.
Arduino Leonardo i2c pins - Programming Questions - Arduino …
Apr 29, 2022 · I have an arduino leonardo and i want to connect i2c periphicals. what are the arduino leonardo i2c pins. i see there are scl and sda pins in the arduino. in the arduino leonardo pinout i see d2 and d3 as i2c pins. can i use i2c device and d2 and d3 pins separatly
How to change the default pin number in wire.h library
Jul 28, 2022 · I would not modify the adafruit library (or any 3rd party library that uses the Wire library) to set the i2c pins as it is not needed. The esp8266 core Wire library already has an API function to set the pins used. If you call the Wire.begin(sda_pin, scl_pin) function, the pins you pass in will be remembered.
How do I use I2C devices with Arduino?
Feb 23, 2014 · The Arduino Due has two I2C / TWI interfaces SDA1 and SCL1 are near to the AREF pin and the additional one is on pins 20 and 21. As a reference the table below shows where TWI pins are located on various Arduino boards. Board I2C / TWI pins. Uno, Ethernet A4 (SDA), A5 (SCL) Mega2560 20 (SDA), 21 (SCL) Leonardo 2 (SDA), 3 (SCL)
RP2040 and I2C pins change - Hardware - Arduino Forum
Jul 19, 2023 · Hello all, I'm having a very difficult time getting I2C working properly on the rpi pico RP2040 (not NanoRP2040). I have tried in PlatformIO and Arduino IDE, using Earles Arduino-Pico core and the official Arduino core. I got it going using Earles core, because I had to change the I2C pins from 4/5 to 0/1 for the specific PCB that I developed by using the …
ESP32 C3 Supermini Pinout - Hardware - Arduino Forum
Nov 16, 2023 · Hi everybody, I am not too much familiar with HW stuff and a little more than newbi on SW. I would like to use this ESP32C3 supermini board. For the pinout I found some different versions on the web and I wonder which one is the real one? My second question is: I want to use just 3 simple digital output signals to drive stepper motors, 5 digital inputs for …
I2C on NANO pins? - Programming Questions - Arduino Forum
Jan 7, 2016 · I am having trouble with the NANO I2C Wire library. Right now I am running in circles. With the answers to the following 3 questions, I believe I can make progress. Note: I am using a genuine Arduino Nano V3.0 and the standard Wire library. I have found a document showing the I2C pins on Arduino NANO as A4 and A5 and another says they are D4 and D5. …
i2c - How to choose SDA/SCL pair on Arduino Due? - Arduino …
May 31, 2022 · Pins 20 and 21 are the default I2C pins. A lot of libraries assume you use these, and would require some extra work to get working with SDA1/SCL1. They also have their pullup resistors already present on the board of the Due (see schematic). So just use pins 20 and 21, unless you have a good reason to use the other.
wire library - How to choose alternate I2C pins on ESP32?
This sensor use I2C communication. Inside the Arduino library, there is this function to start to collect data: //Start I2C communication void HTU21D::begin(TwoWire &wirePort) { _i2cPort = &wirePort; //Grab which port the user wants us to use _i2cPort->begin(); } As you can see, we can set in this function which port we want to use. Perfect.
I2C via other available Pins - Interfacing - Arduino Forum
Jun 21, 2010 · Wait.. so can you redirect I2C to other digital pins and then use Analog_4 and Analog_5 as regular analog pins to measure voltages? Or would Analog_4 and Analog_5 still be hogtied by I2C? Grumpy_Mike July 1, 2010, 7:44am
- Some results have been removed