Hi My netro has been offline for more than 1 day can you estimate when it will be back online? Julian

Hi I have 6 senors that have all worked perfectly for 3 months unattended. A month ago I noticed 1of them only had 5% charge so I switched it to 12 hour reporting and it is now on 38%. Today another sensor has gone to 0% charge and stopped reporting. It would be great if you could be set it automatically switch at say 30% charge. It will be 3 months before I am back to the house so I hope the sensor can recover. Thanks for a fantastic product.