change tx power and frequency during program run

[butterken]

I am now trying to build a fieldtester base on AS923. I have both heltec wifi lora 32V2 and cube cell ab01. The fieldtester is now fully functional, it send an uplink in DR0 and a downlink payload with gatewayid,rssi and snr will be queued on the server-side. The device receive the downlink payload and it shows up the uplink rssi, snr for each gateway.

The problem is that a field tester should be able to send by different tx power(no need to above max, maybe 14db,10db) and frequency(such as 923.2, 923.4, 923.6, 923.8 Mhz), but I dont know how to modify the tx power and frequency in the main program. I found them in the AS923.h and i can change the tx power as well as the frequency by modify the setting on the .h file. Unlike the datarate, these value seems cant be changed in the main program. Any idea for this issue?

Noticed that ADR must turned off and OTAA must be used.