rnodeconf options usage

[cascafico]

Hello Everyone,

Heltec wireless stick V3
I installed TNC firmware 1.72 with provision, hash and LoRa parameters steps. Everything worked fine, but I experienced some anomalies or maybe I misused options.

I made some tests on antennas so I set low radio power. Eventully I wanted to set back power to 21 dBm, but remained unaltered at 7:

$ rnodeconf --txp 21 /dev/ttyUSB0
[15:44:26] Opening serial port /dev/ttyUSB0...
[15:44:30] Device connected
[15:44:30] Current firmware version: 1.72
[15:44:30] Reading EEPROM...
[15:44:30] EEPROM checksum correct
[15:44:30] Device signature validated

$ rnodeconf -i /dev/ttyUSB0
[SNIP]
[15:44:42]  Max TX power       : 7 dBm

Maybe I missed to specify the "-T" option? So I tried the complete parameter set:

$ rnodeconf -T --freq 869525000 --bw 500000 --txp 21 --sf 7 --cr 5 /dev/ttyUSB0
[22:37:17] Opening serial port /dev/ttyUSB0...[22:37:20] Device connected
[22:37:20] Current firmware version: 1.72
[22:37:20] Reading EEPROM...
[22:37:21] EEPROM checksum correct
[22:37:21] Device signature validatedTX Power in dBm: 

after this, no more prompt. Hittin CTRL-C I got this:
rnode.txpower = int(input()) ^^^^^^^^^^^^ValueError: invalid literal for int() with base 10: ''

I repeated the command lowering txp by 1 and I found that parameter was stored only if lower or equal 18.

Then I tried:

$ rnodeconf -T --txp 21  /dev/ttyUSB0
[22:45:16] Opening serial port /dev/ttyUSB0...
[22:45:20] Device connected
[22:45:20] Current firmware version: 1.72
[22:45:20] Reading EEPROM...
[22:45:20] EEPROM checksum correct
[22:45:20] Device signature validated
[22:45:20] Please input startup configuration:

at this point command asked me to enter manually the complete LoRa values set:

Frequency in Hz: 869565000      
Bandwidth in Hz: 500000
TX Power in dBm: 21
Spreading factor: 7
Coding rate:  5

and finally echoed:

[22:45:57] Radio reporting frequency is 869.565 MHz
[22:45:57] Radio reporting bandwidth is 500.0 KHz
[22:45:57] Radio reporting TX power is 21 dBm
[22:45:57] Radio reporting spreading factor is 7
[22:45:57] Radio reporting coding rate is 5
[22:46:00] Device set to TNC operating mode