If I want to read the battery level, can I just use ADC?

[GunMin]

I would like to send the current status of the battery as a beacon.

ADC and a few resistors and what do I need?

I am currently using nrf51822.

I know nrf51822 to support the 10bit ADC.

Just supply the + and - connections on the battery level nrf51822 Can I read?

And do I need additional hardware is what?

And do I need additional software (Source) is what?

[Wojtek]

If Your battery is directly connected to nrf51822 as power source, You can just set CONFIG.INPSEL register to set VDD (with 1/3 or 2/3 voltage division) as ADC source. If You are using newest SDK, You can find ADC driver there which could be helpful.

[GunMin]

Thank you. I am using the nrf51_sdk_v6_1_0_b2ec2e6. Do I need to use a higher version than the SDK? um .. Are you saying newest SDK is higher than I use?