I followed BLE Nano - Low Power Consumption to program the NanoV2 in low power mode and got ~0.2mA while advertising and a bit less while connected.
However some time later, while working on a very low power supply for the board, the NanoV2 switched into a high power >2.5mA mode with no change to the sketch.
Now when the Nano powers up the orange led flashes for 30sec and then goes solid. Reflashing the low power sketch does not fix this.
Questions: i) What mode is the Nano V2 in to cause the high power and orange led to flash
2) How do I get the chip back into low power mode.
I am guessing that there is some uncleared interrupt or continually occurring interrupt that causes ble.waitForEvent(); to trigger all the time, But cannot tell what is happening using the Arduino IDE since Serial is Turned off as part of the low power sketch.