->air720
1.cat.1 compatible;
2.fix bugs
3.update at commands relay to the air720_at_manual 4.20
->bc26
1.fix bug (power key retain low , when the module comes into sleep mode,so the next time,when module wakes up ,the module can't come into sleep mode )
->air720 1.cat.1 compatible; 2.fix bugs 3.update at commands relay to the air720_at_manual 4.20
->bc26 1.fix bug (power key retain low , when the module comes into sleep mode,so the next time,when module wakes up ,the module can't come into sleep mode )