12/8/2023 0 Comments Arduino due i2c![]() Why the Wemos D1 works, may be because it has better tolerances on the I/O pins, but I think it won't work very long at 5V input directly and it can be damaged on the long run.Yep sorry. For example, to use Wire1, change the line to this: Download File. To run the I2C scan on a different bus, change this line of code: Download File. ![]() Given your link to your display, it shows it needs 5v logic! So my guess is that the I2C on the back of the display also sends out 5V to your Due. The example sketch above uses the default Wire bus. SDA1 will need external pull-ups, it has none onboard the Due. I mean, how you are putting together both pieces of code. ![]() If you say that your I2C devices run OK with Due separately but together, then your problem is probably in your code. Since those can only be addressed from 0x20 to 0x27, I have connected my 20x4 display directly to Arduino's I/O.īut, for those I2C I did use level converters, since the MPC2017 is 5V logic.Īlso, keep in mind that only SDA on pins 20 and 21 have internal pull-up resistors. Arduino Due can perfectly handle two or more I2C devices at once. I'm using many MPC23017 port expanders (use, even all Dué I/o's are not even close to what I need :P) Alternatively it is possible to pass references to functions which read. The pins to be used for the serial data (SDA) and serial clock (SCL) control lines can be defined at run-time. It utilises the pinMode (), digitalWrite () and digitalRead () functions. I have been using both Due's I2C also, but not specificly for a LCD display. Other Parts Discussed in Thread: LDC1614, FDC2214, LDC1314, LDC1612, LDC1614EVM I am trying to access the sensor data from the LDC1614 using an Arduino. SoftWire is a software I2C implementation for Arduino and other Wiring-type environments. ![]() Size 54 x 19 mm (max) / 1.62 x 0.57 Brand CHINA Model Name/Number I2C LCD. Programming Arduino For Arduino Uno and Nano: A4 (SDA) - A5 (SCL) For Arduino Leonardo and Micro: 2 (SDA) - 3 (SCL) For Arduino Mega 2560 and Due: 20 (SDA). Good to hear! So should be my problems only. Wholesale Trader of Arduino Board and Shields - Arduino Due Electronic. There is absolutely nothing wrong with the Due I2C library - I've been using it for years with zero problems. Arduino Due Pinout with What is Arduino, Arduino Installation, Arduino Data Types, Arduino Variables, Arduino Loops, Arduino Functions, Arduino Strings etc. No, I haven't used level converter for the following reasons: there is information DUE has pull-up resistors for 3.3v logic, another reason - the same LCD screen works with Wemos D1 (Arduino like board with 3.3v logic).īut it is a good point, I will try to use level converter, just in case.Ĭompiling is good but LiquidCrystal_I2C library shows warning I'm using avr architecture instead of sam, so probably it won't work. LCD shows nothing using default address 0x27, I2C scanner output random addresses each run, it seems doesn't work with DUE.ĭo you have a level converter for the LCD? The Due operates at 3.3V.ĭo you get a compile error, or is it compiling but not running as expected? But, just coming here and saying "it doesn't work" isn't going to help you either. ![]()
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