Function pamoja_lora_airtime_us 

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

Returns the time on air of a payload, in microseconds.

This is the channel occupancy a transmission costs: how long the radio holds the air, which sets both the duty-cycle budget and most of the energy the transmission spends.

Arguments

• link - the link settings.
• payload_len - the payload length in bytes.

Returns

The time on air in microseconds.