I bought myself a mini lidar and the code seems to work but I don't understnad the following code:
unsigned int t1 = Serial.read(); //Byte-3
unsigned int t2 = Serial.read(); //Byte-4
t2 <<= 8;
t2 += t1;
Lidar_afstand = t2;
You're forming a sixteen bit value from two eight bit values.
unsigned int t1 = Serial.read(); //Byte-3
unsigned int t2 = Serial.read(); //Byte-4
t2 *= 256;
t2 += t1;
Lidar_afstand = t2;
yes, not a very common way of coding it, more common Lidar_afstand = (t2<<8) | t1;
I bought myself a mini lidar and the code seems to work but I don't understand the following code:
unsigned int t1 = Serial.read(); //Byte-3 contains the 'lower byte' of the distance in HEX
unsigned int t2 = Serial.read(); //Byte-4 contains the 'higher byte' of the distance in HEX
t2 <<= 8; // this shifts the byte to the left 8 positions...?
t2 += t1; // adds the higher byte to the shifted lower byte...?
Lidar_distance = t2;
according to the specs now t2 contains a hexadecimal number (in mm)
I have no idea why not decimal, but anyway
I want a decimal value
Can I convert this t2 into a decimal number? and how?
I can't find a simple 'HEX to DEC function anywhere on the web
(No idea why those makers of the lidar give a decent example or library... grrrrrr)
That's just to misguide you 
they mean they rebuilt the full 2 byte integer in t2
just print t2 and you'll see it in decimal
Serial.print(t2); // in decimal or Serial.print(t2, DEC); but DEC not needed as this is the default
Serial.print(t2, HEX); // in hexadecimal
Serial.print(t2, BIN); // in base 2 (binary)
T1 and T2 are 8-bit binary numbers. Once combined into Lidar_distance you have a 16-bit binary number. You can then display the number in decimal:
Serial.print(Lidar_distance);
(No idea why those makers of the lidar give a decent example or library... grrrrrr)
No idea why you started a new thread with the same question when you already had an answer.
Grrrr.
Threads merged - do not cross-post.
according to the specs now t2 contains a hexadecimal number (in mm)
It also contains a binary number, also in mm
Amazing
AWOL:
It also contains a binary number, also in mmAmazing