Connection; stability

Hi Dialog,

我发展的一对of BLE device, both server and slave, base on DA14580. After connected to each other, even I leave these processor to be idle(no BLE read/write/notify, no i2c, gpio... active ) but they still disconnect randomly. It looks like one of them corrupts in link layer, because after disconnect they could not reconnect again. Below are the parameters I set for this connection and some wireshark captures.