How to update the code to convert and store uint16_t value into 4 Hex chars (including possible leading "0"s). The program should update
char *AT_Send = "AT$SlhLH\n"; // 9x
to
char *AT_Send = "AT$S04ED\n"; // 9x
I thought to use utoa() string function but it doesn't work with string declaration by pointer and it is ignoring leading "0"s. Maybe I should create own function for it to be able to send the final string to USART (IoT)
#define F_CPU 3333333
#include <avr/io.h>
#include <xc.h> // F_CPU
#include <util/delay.h> // _delay_ms()
#include <stdlib.h> // utoa()
#include <string.h> //
volatile union u_type //Setup a Union
{
unsigned int IntVar;
unsigned char Bytes[2];
}
temp;
char *AT_Send = "AT$SlhLH\n"; // 9x
char *buffer = "0000";
//uint16_t Voltage = 1261; // 0x04ED, remark 12.61 Volts * 100, from ADC
uint8_t n;
int main(void) {
temp.IntVar = 1261; // Voltage
n = temp.Bytes[0]; // Just for variable watch
utoa(temp.Bytes[0], buffer, 16); // Lo)
utoa(temp.Bytes[1], buffer, 16); // Hi)
while (1) {
}
}
. Sleep consumption is about 1 µA.
. I am a beginner.