Problem with SDA and SLA pins for I2C LCD Screen

Problem with SDA and SLA pins for I2C LCD Screen

Lukas updated 4 years, 2 months ago 3 Members · 4 Posts
Hardware
mr-controllino

Administrator
January 29, 2021 at 6:11 am

Hello Antonio,

Can you please check if the pins are working properly? So can you please make a “blink” on the pins and see if the 2 pins are switching accordingly?

Regards
Marco
- Antonio
  
  Member
  January 29, 2021 at 7:07 am
  
  The pins on the Controllino Mega for SDA and SCL pin are connected to “X1” in the pins section, so unfortunately I can’t see them being actuated by any blinking LEDs. It seems to be showing continuity and a constant voltage between the SDA, SCL pins and the ground. Image of the pinout to show what I mean to “X1”, with the SDA and SCL pins: “https://www.controllino.com/wp-content/uploads/2018/10/CONTROLLINO-MEGA-Pinout.pdf”
  - Lukas
    
    Member
    February 16, 2021 at 1:58 pm
    
    Hello Antonio,
    
    I assume that Marco means to configure the pins 20 and 21 as digital outputs and try to trigger them to LOW and HIGH and measure the output voltage.
    
    In addition – may I ask you to share the I2C detector sketch you use?
    
    Thanks,
    
    Lukas

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