Very low Link Quality

I have a CC2531 co-coordinator connected to my Raspberry Pi using a 1m USB extension cable…

I have two CC2530 routers that are about 10m and 20m away from the co-ordinator through 2 timber walls.

I have 4 Xiaomi smart plugs which should be acting as routers too…

In general my devices all seem to have very low Link Quality… My two CC2530 routers are currently showing a ZERO link quality.

The zigbee network is on the default channel 11 being 2405MHz and my wifi access points are on channel 11 being 2462MHz so there should be very little interference going on here.

Does anyone have any other suggestions on what I could try to improve things?

My next thought is to purchase the Texas Instruments CC26X2R1 and use that as the coordinator…

My old Xiaomi hub had no issues like this…

Before buying a CC26X2R, you could try to use a CC2530 as a coordinator.

Thanks @francisp

I think I have flashed one of my CC2530 boards properly and have connected it to a USB-TTL board.
This is what I’m getting on the raspberry pi but I can’t seem to get it working on anything like /dev/ttyACM0 any thoughts on what I am doing wrong?

It looks like the first one (Future Technology FT232) is your USB-TTL board.

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Yes that does appear to be it… but what should I be typing into the configuration.yaml file?

Dec 20 18:56:23 openHABianPi npm[9749]: zigbee2mqtt:error 2019-12-20T05:56:23: Failed to start zigbee
Dec 20 18:56:23 openHABianPi npm[9749]: zigbee2mqtt:error 2019-12-20T05:56:23: Exiting…
Dec 20 18:56:23 openHABianPi npm[9749]: zigbee2mqtt:error 2019-12-20T05:56:23: Error: Error while opening serialport 'Error: Error: Is a directory, cannot open /dev/serial/by-id’
Dec 20 18:56:23 openHABianPi npm[9749]: at Znp. (/opt/zigbee2mqtt/node_modules/zigbee-herdsman/dist/adapter/z-stack/znp/znp.js:109:32)

Okay I think I have sorted it now… Trail and error :slight_smile:


The quality of my network is still very low… A lot of sensors work if I repair them but then eventually drop off again…

In one room I have two xiaomi smart plugs about 2m away from each other… One works fine and the other doesn’t work very well at all…I expected one would act as a repeater giving the other one a good connection… Is this not how it works?