How to get string from float

Projects Programming
1

Hi,

I am trying to send wirelessly data to another Arduino, but I cannot do that because it is float data type.
Now, I have investigated that I can float multiply and get full number and then convert to string. But I do not know how to multiply! :frowning:

Serial.println(scale.get_units(), 3);

It prints number xx.xxx and I want it multiply by 10 000.
Can you help me please :roll_eyes:

Thanks!

2 
Serial.println(10000.0*scale.get_units(), 3);
3

Thanks for replay, but it does not work for me. Number "3" means how much numbers will be after comma. I did how you showed me, but output was different result. I don not know how to convert this FLOAT function in integer. I need send result through Wireless 2.4GHZ.

#include "HX711.h";
//******************Wireless********************
#include <SPI.h>
#include <RH_NRF24.h>
//******************Wireless********************
#define calibration_factor 38900 //This value is obtained using the SparkFun_HX711_Calibration sketch
//******************Wireless********************
RH_NRF24 nrf24;
//******************Wireless********************


HX711 scale(A1, A0);
void setup() {
  Serial.begin(9600);
  scale.set_scale(calibration_factor); //This value is obtained by using the SparkFun_HX711_Calibration sketch
  scale.tare();  //Assuming there is no weight on the scale at start up, reset the scale to 0

  
//******************Wireless********************
  if (!nrf24.init())
    Serial.println("init failed");
  // Defaults after init are 2.402 GHz (channel 2), 2Mbps, 0dBm
  if (!nrf24.setChannel(1))
    Serial.println("setChannel failed");
  if (!nrf24.setRF(RH_NRF24::DataRate2Mbps, RH_NRF24::TransmitPower0dBm))
    Serial.println("setRF failed");    
//******************Wireless********************  

}

void loop() {
 
  Serial.println(scale.get_units(), 3); //scales value
  

  

//******************Wireless********************  
  // Send a message to nrf24_server
   char* msg = "I need get there scale function (scale.get_units(), 3)";

  if (!nrf24.send((uint8_t*)msg, strlen(msg)))
      Serial.println("send failed");   
  nrf24.waitPacketSent();
//******************Wireless********************  
}

I have tried different ways, but always something goes wrong :smiley:

THNAKS!!!! :art:

4

If you want to make a character string from:

  1. a floating point value, use the function dtostrf()
  2. an integer, use either ltoa(), itoa() or utoa() as appropriate.
    e.g.
char msg[10];  //make large enough!
dtostrf(x, 9, 3, msg); //x is a float variable
...or...
itoa(val, msg, 10); //val is a signed int variable