active current TWI

[Matthias]

Hello,

i am measuring the current on my nrf51822 board. While sending messages over I2C i have a current about 4.4 mA.

This should be correct? The CPU, 1v2, hfclk and i2c are using during the send/receive?

Greets Matthias

[Asbjørn]

From the description of what you have running, then yes, you should see a current consumption around what you measure. If you need to lower it then perhaps you can shut down the MCU for longer periods or at least put into power down during transmissions.

[Matthias]

I have the softdevice running with only wait_for_event(); in the rtc interrupt i enable the twi, read the value of the sensor, send command for measurement and disable the twi immediately after sending. can i reduce the current while sending? As the softdevice is handling the power management itself? Of course i like to reduce power, please tell me how i can reduce it. Tanks Matthias