Hello,
When trying to use the example code, the sensor will “freeze” and keep giving the same repeating value regardless of the sensor position.
I was able to get the sensor to be more repeatable after communicating over modbus instead of UART. But after about 7 hours it would only return “0” as a measurement.

Any ideas what I can do?

Here is the code I am using to communicate over modbus:

#include <ModbusMaster.h>

unsigned long lastMeasTime = 0; // Last time get_distance() was invoked
unsigned long measInterval = 2000; // Interval at which to invoke get_distance() (in milliseconds)

ModbusMaster node; // instantiate ModbusMaster object

void setup() {
Serial1.begin(115200); // Begin Serial1 at 115200 baud rate
// Initialize Modbus communication on Serial1 with slave ID 0x50
node.begin(0x50, Serial1);
delay(1000);
}

void loop() {
unsigned long currentTime = millis(); // Get the current time
if (currentTime - lastMeasTime >= measInterval) {
uint16_t measurement = get_measurement(); // Get the measurement
}

uint16_t get_measurement()
{
uint8_t result; // variable to store result
uint16_t data = 0; // variable to store the data, initialized to 0

result = node.readHoldingRegisters(0x34, 1); //<--measurement
if (result == node.ku8MBSuccess) {
data = node.getResponseBuffer(0); // get the data from buffer
DEBUG_SERIAL.print("Measurement data: ");
DEBUG_SERIAL.println(data); // print the measurement data in decimal format
if (data > 0) {
return data; // return the measurement data if it's within the range
}
} else {
DEBUG_SERIAL.print("Read failed, Modbus error code: ");
DEBUG_SERIAL.println(result); // print error code
}

return 0; // return 0 if the measurement is out of range or an error occurred
}