another serial test.

main.c

@@ -612,7 +612,8 @@ int main(int argc, char * argv[]) {
       fprintf(stderr, "Python read Result: %s\n", cmdbuffer);
 
 //      serialPuts(uart_fd, cmdbuffer);   // write INA data to Pico over serial
-      serialPuts(uart_fd, 'XXX\n');   // write data to Pico over serial
+ 	char test[] = 'Hello\n';	   
+      serialPuts(uart_fd, test);   // write data to Pico over serial
 
       const char space[2] = " ";
       token = strtok(cmdbuffer, space);