Hi. I will send the data from the temperature sensor with the RF module. I can send unsigned char with RF module. Data integer from temperature and humidity sensor. How can I convert an integer data type to an unsigned char data type?

[TDK · Accepted solution]

No doubt the RF module sends bytes, not any particular data type. How you interpret those bytes on the other end is up to the receiving software. Provide a pointer to the data using a cast.

int x = 67;
HAL_UART_Transmit(huart1, (unsigned char *) &x, sizeof(x), 0);