mobile

Hello. I have a 2 year son with T1 diabetes. A new app called xdrip has been created that bring via BLE RAW Blood glucose values from a self assembled wixel Arduino board with a hm10 ble module from a sensor put underskin of my baby.
This software has the capability to upload every 5 minutes the last value via REST api or mongolab through a cloud web site so you can see the BG everywhere you have internet access. And here it is the problem. With a OPO this uploading feature is regular (Every 5 minutes just a new value is recorded by the app) while with a moto G with stock ROM (kk or lollipop) and with a CM12 is not regular and could be every 5 minute or 7 or 8 or often it jumps a value. All settings are identical. It's like motog is going to sleep and forget to upload and only after a while it uploads datas. Is there any kernel setting to tune to avoid it? Or is there any possibility to insert a wakelock? I tried to reduce heartbeat times but without luck. Is it due to memory lack and different memory using from 2 different phones? Thank you to everyone could help me.