Now lest’s TMP36 to measure temperature. Hook up a analog temperature sensor (TMP36) as follows. You may want to read data sheet of TMP36. Implement API We are using Spark.variable() function to expose temperature as API. Spark.variable("temperature", &temperature, DOUBLE); The whole code #include <stdarg.h> #define PRINTF_BUFFER_SIZE 128 void Serial_printf(const char* fmt, ...) { char buff[PRINTF