LoRaWan TX power control during AdrAck request

[t0000899]

Hello, I observed this behaviour during AdrAck request which I think is incorrect.

• The network issue a mac command to lower TX power.
• After sending some packets LoPy4 send a AdrAck request to the network.
• Lopy4 increase the TX power to maximum even though the radio link is OK. I could verify this by lookin at the RSSI power from the received packets.
• Lopy4 receive ACK from the network.
• Lopy4 continue to send packets with maximum TX power.

Could this behaviour be changed so that the first AdrAck request is made using the current TX power setting and increase it for the following requests if no packet from the network is received?

If I am not mistaken the code for this is located in funktion bool RegionEU868AdrNext() (RegionEU868.c, line 505).

Used hardware and configuration: LoPy4 board. Latest stable firmware. LoRaWan connection to commercial network with OTAA, ADR and EU868 frequency band.

Juho

[t0000899]

This behavior has not changed in the latest firmware: Pycom MicroPython 1.20.1.r1 [v1.11-3138a13] on 2019-10-08; LoPy4 with ESP32 Pybytes Version: 1.1.3

The LoRa TX-power is stuck at maximum because the ADR-engine at network side does not know that the node has changed output power on its own. Is there a way to inform the network that power has been increased?

Hope this will be looked at.