How to communicate with CP2102 USB to UART Bridge?

[metanav]

Hi,

I am trying to connect a Silabs CP2102 USB to UART Bridge but I do not know how to use this library to connect and send/recieve data. Any minimal example or hints would be appreciated.

Thanks!

[ceilingduster]

+1 I've found it difficult to make it work on my CP2104 USB to UART Bridge. It detects, but not able to read or write any further and lacking documentation to figure it out. Any example would be appreciated as well.

Here is the code I am using:

#include <elapsedMillis.h>
#define USBHOST_OTHER
#include <Arduino_USBHostMbed5.h>

REDIRECT_STDOUT_TO(Serial)

USBHostSerial userial;

void setup() {
  Serial.begin(115200);
  while (!Serial) {}

  Serial.println("Starting Serial test...");

  // Enable the USBHost
  pinMode(PA_15, OUTPUT);
  digitalWrite(PA_15, HIGH);

  elapsedMillis em;
  while (!userial.connect()) {
    if (em > 5000 ) {
      Serial.println("No USB Serial device connected");
      em = 0;
    }
    delay(500);
  }
  Serial.println("Serial connected");
}

void loop() {
  // print characters received
  while (userial.available()) {
    Serial.write(userial.getc());
  }

  delay(1000);
}

On run, it just spams "No USB host Serial device connected" regardless of any serial dongle that I have tried (FTDI or Silicon labs chip).

I have other code here -> https://github.com/ceilingduster/ambe3k_experiments/tree/main/arduino_sketches

The device I am using is an AMBE 3000 USB vocoder (https://github.com/ceilingduster/ambe3k_experiments/blob/main/AMBE-3000R_manual.pdf)