RFM69 ATC not working?

[TSD]

@mfalkvidd
And if you turn on ATC? Does that work? Are you on 2.3.0?

[mfalkvidd]

@tsd I don't know which version I am using. I'm currently travelling so I can't check easily.

[TSD]

@scalz
I found your name in the Raspberry Pi MySensor driver files. Would you happen to know why the RSSI measurement for a RPi gateway doesn't work? I'm having trouble getting ATC to work with my RPi gateway. It works well with an Arduino gateway.

[gohan]

I still don't understand the need to measure RSSI on gateway...

[TSD]

@gohan
I couldn't get the RSSI measurement on the gateway to work, so I'm not doing that.

I want to get ATC to work. As ATC uses RSSI to optimize power, a correct RSSI measurement (on the node) is needed. ATC (and so the RSSI measurement) works well on an Arduino gateway, but not on a RPi.

As I don't have a software background and am still newish to MySensors, I'm hoping someone on the forum knows what to do. In the meantime, I'll keep digging myself :)

[gohan]

But do the nodes increase power as they are moved farther away from the gateway?

[mfalkvidd]

@gohan as TSD has already explained earlier in this thread, the ATC nodes always transmit on max power when using the raspberry pi gateway, regardless of distance.

[prelektr]

Was there any follow up to this issue?

I can confirm that ATC does not work using Rpi gateway. Well, it kind of works when you set very low MY_RFM69_ATC_TARGET_RSSI_DBM. I tried -100dBm and then the node is finally decreasing TX power to -2dbm. Anyway, when using Rpi as a gateway I can see (from node perspective) very low (-90) TX RSSI, whereas the same parameter is -26 when using arduino serial gateway (with the same close distance between node and the gateway).

Since the TX RSSI is very low, then the ATC works only when you set your target to lower than that, like mine -100 setting for test purposes.

[TSD]

@prelektr Because I wasn't making much progress, I gave up on this and added an Arduino Nano gateway that communicates with the RPi via UART. Then the ATC works. The Nano (clone) is just a $2 board, so it isn't a big deal to add it.

[kted]

Any news from the developers on this issue?