T-echo reports TX power 0 dBm

[fustygerbil]

When trying to start nomadnet, T-echo (CE firmware 1.73) reports TX power of 0 dBm

[2024-12-18 12:45:38] [Debug] Started shared instance interface: Shared Instance[37428]
[2024-12-18 12:45:38] [Debug] Cleaning ratchets...
[2024-12-18 12:45:38] [Verbose] Bringing up system interfaces...
[2024-12-18 12:45:38] [Notice] Opening serial port /dev/ttyACM0...
[2024-12-18 12:45:41] [Notice] Serial port /dev/ttyACM0 is now open
[2024-12-18 12:45:41] [Verbose] Configuring RNode interface...
[2024-12-18 12:45:41] [Verbose] Waiting for radio configuration validation for RNodeInterface[RNode LoRa Interface]...
[2024-12-18 12:45:41] [Debug] RNodeInterface[RNode LoRa Interface] Radio reporting frequency is 867.2 MHz
[2024-12-18 12:45:41] [Debug] RNodeInterface[RNode LoRa Interface] Radio reporting bandwidth is 125.0 KHz
[2024-12-18 12:45:41] [Debug] RNodeInterface[RNode LoRa Interface] Radio reporting symbol time is 2.05ms (at 488 baud)
[2024-12-18 12:45:41] [Debug] RNodeInterface[RNode LoRa Interface] Radio reporting preamble is 22 symbols (45ms)
[2024-12-18 12:45:41] [Debug] RNodeInterface[RNode LoRa Interface] Radio reporting CSMA slot time is 50ms
[2024-12-18 12:45:41] [Debug] RNodeInterface[RNode LoRa Interface] Radio reporting TX power is 0 dBm
[2024-12-18 12:45:41] [Debug] RNodeInterface[RNode LoRa Interface] Radio reporting spreading factor is 8
[2024-12-18 12:45:41] [Debug] RNodeInterface[RNode LoRa Interface] Radio reporting coding rate is 5
[2024-12-18 12:45:41] [Verbose] RNodeInterface[RNode LoRa Interface] On-air bitrate is now 3.12 kbps
[2024-12-18 12:45:41] [Notice] RNodeInterface[RNode LoRa Interface] is configured and powered up
[2024-12-18 12:45:41] [Verbose] System interfaces are ready
[2024-12-18 12:45:41] [Verbose] Utilising cryptography backend "openssl, PyCA 44.0.0"
[2024-12-18 12:45:41] [Verbose] Configuration loaded from /home/forest/.reticulum/config
[2024-12-18 12:45:41] [Verbose] Loaded 1 known destination from storage
[2024-12-18 12:45:41] [Verbose] Loaded Transport Identity from storage

[jacobeva]

Can you paste your interface config file here please? It looks like this configuration of 0dBm is actually set in your config file. If it wasn't, I would expect RNS to complain that the TX power does not match the configured value.

[fustygerbil]

Sorry, I should have said that I saw the TX power mismatch error with any (config file) txpower value > 0. This situation applies regardless of the configured (non-negative integer) value (even though I did have it set to 0, here, to see what would happen).

Incidentally, running rnodeconf --info returns a maximum TX power level of 22 dBm.

[jacobeva]

@jeremybox any ideas mate?

[jacobeva]

@fustygerbil Can you confirm if you still have this issue on the current dev branch?

[jeremybox]

I have always used 0db in my device, so I'm not sure what it "should" be.

https://github.com/markqvist/Reticulum/blob/fd6d8ffff82d75f52fe3f3f9c5726a24f55ee4f0/RNS/Utilities/rnodeconf.py#L279

The above is the code that rnodeconf --info returns. It's just a hardcoded array of numbers. When I added the T-Echo code I just copied that 22 from the other lines because I didn't know what that value meant, but the 22dBm isn't polling the actual device itself. Will have to check out the chip's actual max power from spec when I get some time, but I have the same result in a quick test where anything besides 0dBm doesn't function.

Edit: the SX1262 is advertised as being able to go to 22dBm, so I'll have to check into it more.

[jacobeva]

That's odd.

[fustygerbil]

@fustygerbil Can you confirm if you still have this issue on the current dev branch?

Sorry, I'm failing to get working firmware on the device now. After DFU upload, rnodeconf /dev/ttyACM0 --firmware-hash $(./partition_hashes from_device /dev/ttyACM0) fails because partition_hashes from_device /dev/ttyACM0 returns Could not get partition hash from device: list index out of range

Running the rnodeconf subprocess in partition_hashes manually as rnodeconf /dev/ttyACM0 -L fails:
[20:19:06 Opening serial port /dev/ttyACM0... [20:19:10 Serial port opened, but RNode did not respond. Is a valid firmware installed? Got invalid response while detecting device