pub fn read(key: &[u8], buf: &mut [u8]) -> Result<usize>Expand description
Read a value from NVS into buf. key must be \0-terminated.
Returns the number of bytes actually read, which may be less than buf.len()
if the stored value is shorter.
ยงErrors
Returns Error::NotRegistered if the key does not exist, or another error
if the read fails.