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I am trying to use a sketch which I originally had working with an UNO, it made use of the software serial Library and was being used for a LiDAR sensor, however when I try and use the sketch on an ESP32 it does not work properly and I have determined that it is due to the software serial library, I can’t figure out where I am going wrong with it. i have connected the sensor up to pin 2 and 4 on the esp as I have indicated these pins for rx and tx in the code.
CODE:
#include <SoftwareSerial.h>
#include “TFMini.h”
TFMini tfmini;
SoftwareSerial SerialTFMini(2, 4); //The only value that matters here is the first one, 2, Rx
void getTFminiData(int* distance, int* strength)
{
static char i = 0;
char j = 0;
int checksum = 0;
static int rx[9];
if (SerialTFMini.available())
{
rx[i] = SerialTFMini.read();
if (rx[0] != 0x59)
{
i = 0;
}
else if (i == 1 && rx[1] != 0x59)
{
i = 0;
}
else if (i == 8)
{
for (j = 0; j < 8; j++)
{
checksum += rx[j];
}
if (rx[8] == (checksum % 256))
{
*distance = rx[2] + rx[3] * 256;
*strength = rx[4] + rx[5] * 256;
}
i = 0;
}
else
{
i++;
}
}
}
void setup()
{
Serial.begin(115200); //Initialize hardware serial port (serial debug port)
while (!Serial); // wait for serial port to connect. Needed for native USB port only
Serial.println (“Initializing…”);
SerialTFMini.begin(TFMINI_BAUDRATE); //Initialize the data rate for the SoftwareSerial port
tfmini.begin(&SerialTFMini); //Initialize the TF Mini sensor
}
void loop()
{
int distance = 0;
int strength = 0;
getTFminiData(&distance, &strength);
while (!distance)
{
getTFminiData(&distance, &strength);
if (distance)
{
Serial.print(distance);
Serial.print(“cm\t”);
Serial.print(“strength: “);
Serial.println(strength);
}
}
delay(100);
}
