TCA9548A connection

Projects General Guidance
1

Hello again, I have a new problem, I am trying to use a TCA9548A to connect 2 20x4 I2C LCDs and 2 16x2 I2C LCDs. I am using a Leonardo, so my SDA and SCL are D2 and D3 to connect to the SCL and SDA of the TCA9548A. I am connecting the VCC to 5V. I can detect the TCA9548A through the Arduino, but I cannot detect the LCDs connected to the various channels. I am using this code to detect I2C devices.

#include <Wire.h>

#define TCA_ADDR 0x70 // Address of the TCA9548A multiplexer

void setup() {
  Serial.begin(9600);
  Wire.begin();
}

void loop() {
  scanAllChannels();
  delay(1000); // Delay before rescanning
}

void scanAllChannels() {
  // Scan through each channel
  for (byte channel = 0; channel < 8; channel++) {
    // Select channel
    selectChannel(channel);

    // Scan for devices on the selected channel
    scanChannel(channel);
  }
}

void selectChannel(byte channel) {
  Wire.beginTransmission(TCA_ADDR);
  Wire.write(1 << channel); // Select the desired channel
  Wire.endTransmission();
}

void scanChannel(byte channel) {
  Serial.print("Scanning Channel ");
  Serial.println(channel);

  Wire.beginTransmission(channel);
  byte error = Wire.endTransmission();

  if (error == 0) {
    Serial.println("Device found!");
  } else {
    Serial.println("No device found.");
  }
}

Any help is greatly appreciated

2

Connected how? Please show a circuit diagram and clear photos of the setup.

3

I think the code was the issue, I used someone else's and it works. But thank you for your assistance

4

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