Hi Alexander, I kinda think the Intercard debit reader author needs to be clearer.
Transmission (tx_power) is measured in dB, not measured in Mbps, as are Data Rates.
I'm pretty sure they want to make sure we respond to probe requests and beacons seen at 2mbps data rates
in case/if they might be only 802.11b wifi capable.
Pls see this table under Protocol on the Wikipedia page for 802.11:
https://en.wikipedia.org/wiki/IEEE_802.11But further to your question, we can only configure the Minimum rate, from 2 -> 5.5 -> 11, but not down/only
to a Maximum of 2mbps.