Function pamoja_lora_min_off_time_us 

#[unsafe(no_mangle)]
pub extern "C" fn pamoja_lora_min_off_time_us(
    link: PamojaLoraLink,
    payload_len: usize,
    duty_cycle_permille: u32,
) -> u64

Returns the minimum silence after a transmission to honor a duty-cycle limit.

Arguments

• link - the link settings.
• payload_len - the payload length in bytes.
• duty_cycle_permille - the limit in parts per thousand, so 10 is 1%.

Returns

The required off time in microseconds, or UINT64_MAX if the limit is zero, which forbids transmitting at all.