try {
AltosSensorMetrum sensor_metrum = new AltosSensorMetrum(link);
listener.set_battery_voltage(AltosConvert.mega_battery_voltage(sensor_metrum.v_batt));
try {
AltosSensorMetrum sensor_metrum = new AltosSensorMetrum(link);
listener.set_battery_voltage(AltosConvert.mega_battery_voltage(sensor_metrum.v_batt));