Concatenate float+char+int is possible?

The SCI sends data 8 bits at a time. If you want to transmit a float (32 bits), a char (16 bits), and an int (16 bits), you could do something like this:

float f;
char c;
int i;

SCIFFTX = (uint32_t)f >> 24;
SCIFFTX = ((uint32_t)f >> 16) & 0xff;
SCIFFTX = ((uint32_t)f >> 8) & 0xff;
SCIFFTX = (uint32_t)f & 0xff;

SCIFFTX = c >> 8;
SCIFFTX = c & 0xff;

SCIFFTX = i >> 8;
SCIFFTX = i & 0xff;

a sensor node I have different data like: 3 voltages and 3 currents. and I need to send this data as follows: node name, data type (voltage or current 1 1), data value (current or voltage value).
but when I try to send a char something like this: char [] = { "node1", "voltaje1" voltaje1} I can not. I can do to send this information?

Hey,

maybe like this:

char buff[128];
int length;

length = sprintf(buff, "node1, voltage1 %d", voltage1);

At this point buff will contain the string you want, and length will contain the length of the string.

J

Hi Natalia,

I think it's time to be more specific about things. Please answer the following questions:

• What is the exact error message you get with sprintf?
• Could you please write a short example, that shows the input data (variables), and the expected output string? Something like this:
  float voltage1 = 4.75;
  char nodeName[] = "node1";
  expected output: "node1, voltage1: 4.75";
• Do you also need help with the SCI, or you already worked that one out?

BR,

J