Example: xiaomi mi flora passive listener

[petermm]

(Know this is inside the govee app, but seems a bit much creating seperate apps for examples - and quite a maintainability issue down the line perhaps)

{status, pid} = XiaomiPassiveScan.start_link(:uart)

to setup hold sensor close to your elixir device and this will popup:

[info]  FOUND SUPPORTED DEVICE, currently not configured:  device_adress: 216039227630131 - name:  Flower care

        Config in @listen_to_device_addresses with something like:

            "216039227630131": %{name: "my avocado plant", pubsub_topic: "avacoda_plant", pubsub_module: MyApp.PubSub }

add the suggested config to @listen_to_device_addresses and then your measurements will come in:

18:03:16.969 [info]  Init commands completed successfully

18:03:16.969 [info]  Scanning for devices

18:03:21.907 [info]  my avocado plant - lux: 217

18:03:31.902 [info]  my avocado plant - moisture: 47

18:03:41.903 [info]  my avocado plant - fertility: 203

18:03:53.945 [info]  my avocado plant - temperature: 19.4

[ConnorRigby]

This looks really cool! gonna sit on it for a sec because i believe you're correct about the examples, but love it!

[ConnorRigby]

Just letting you know i haven't forgotten about this. Just been very busy.

[petermm]

no worries, I would suggest we hold out examples for a blue_heron capable nerves_livebook https://github.com/fhunleth/nerves_livebook/issues/50 - and I'll create a livebook example once that happens..

[philipgiuliani]

Hi @petermm , I tried your example and it detected my device successfully. I do not get any data packets tough... I logged all incoming packets and only get these:

07:32:20.460 [info]  Unexpected packet: %BlueHeron.HCI.Event.LEMeta.AdvertisingReport{code: 62, devices: [%BlueHeron.HCI.Event.LEMeta.AdvertisingReport.Device{address: 216039227090229, address_type: 0, data: ["\tFlower care"], event_type: 4, rss: 184}], num_reports: 1}
07:32:22.429 [info]  Unexpected packet: %BlueHeron.HCI.Event.LEMeta.AdvertisingReport{code: 62, devices: [%BlueHeron.HCI.Event.LEMeta.AdvertisingReport.Device{address: 216039227090229, address_type: 0, data: ["\tFlower care"], event_type: 4, rss: 196}], num_reports: 1}
07:32:23.439 [info]  Unexpected packet: %BlueHeron.HCI.Event.LEMeta.AdvertisingReport{code: 62, devices: [%BlueHeron.HCI.Event.LEMeta.AdvertisingReport.Device{address: 216039227090229, address_type: 0, data: ["\tFlower care"], event_type: 4, rss: 182}], num_reports: 1}
07:32:24.440 [info]  Unexpected packet: %BlueHeron.HCI.Event.LEMeta.AdvertisingReport{code: 62, devices: [%BlueHeron.HCI.Event.LEMeta.AdvertisingReport.Device{address: 216039227090229, address_type: 0, data: ["\tFlower care"], event_type: 4, rss: 182}], num_reports: 1}
07:32:26.456 [info]  Unexpected packet: %BlueHeron.HCI.Event.LEMeta.AdvertisingReport{code: 62, devices: [%BlueHeron.HCI.Event.LEMeta.AdvertisingReport.Device{address: 216039227090229, address_type: 0, data: ["\tFlower care"], event_type: 4, rss: 197}], num_reports: 1}

It's a brand new sensor. Do I have to enable / configure it somehow?

---

Update: I also get some with event_type 0, but they do not match the requested pattern

07:41:58.400 [info]  Unexpected packet: {:HCI_EVENT_PACKET, %BlueHeron.HCI.Event.LEMeta.AdvertisingReport{code: 62, devices: [%BlueHeron.HCI.Event.LEMeta.AdvertisingReport.Device{address: 216039227090229, address_type: 0, data: [<<1, 6>>, <<2, 149, 254>>, <<22, 149, 254, 49, 2, 152, 0, 2, 53, 101, 99, 141, 124, 196, 13>>], event_type: 0, rss: 200}], num_reports: 1}}
07:42:00.172 [info]  Unexpected packet: {:HCI_EVENT_PACKET, %BlueHeron.HCI.Event.LEMeta.AdvertisingReport{code: 62, devices: [%BlueHeron.HCI.Event.LEMeta.AdvertisingReport.Device{address: 216039227090229, address_type: 0, data: [<<1, 6>>, <<2, 149, 254>>, <<22, 149, 254, 49, 2, 152, 0, 2, 53, 101, 99, 141, 124, 196, 13>>], event_type: 0, rss: 204}], num_reports: 1}}
07:42:00.469 [info]  Unexpected packet: {:HCI_EVENT_PACKET, %BlueHeron.HCI.Event.LEMeta.AdvertisingReport{code: 62, devices: [%BlueHeron.HCI.Event.LEMeta.AdvertisingReport.Device{address: 216039227090229, address_type: 0, data: [<<1, 6>>, <<2, 149, 254>>, <<22, 149, 254, 49, 2, 152, 0, 2, 53, 101, 99, 141, 124, 196, 13>>], event_type: 0, rss: 205}], num_reports: 1}}
07:42:01.299 [info]  Unexpected packet: {:HCI_EVENT_PACKET, %BlueHeron.HCI.Event.LEMeta.AdvertisingReport{code: 62, devices: [%BlueHeron.HCI.Event.LEMeta.AdvertisingReport.Device{address: 216039227090229, address_type: 0, data: [<<1, 6>>, <<2, 149, 254>>, <<22, 149, 254, 49, 2, 152, 0, 2, 53, 101, 99, 141, 124, 196, 13>>], event_type: 0, rss: 197}], num_reports: 1}}

[petermm]

hi @philipgiuliani - sounds like you have things "wired" up correctly - I assume you have received the "FOUND SUPPORTED DEVICE" message etc.

seems a bit weird - your msg <<1, 6>>, <<2, 149, 254>>, <<22, 149, 254, 49, 2, 152, 0, 2, 53, 101, 99, 141, 124, 196, 13>> has two different bytes before the 152,0 and then no payload after the final 13

only thing I can think of is if you have used the device with the mobile app? - maybe one needs to use the app once to make it start sensoring - also while you're there check for the firmware version, and maybe report that one - also if any firmware updates are available..

[philipgiuliani]

Thanks for the hint. So the trick was really to register the Sensor via the Mi Home App. This will start the broadcasting of the data.

[petermm]

great to hear! - will update the PR/example in a few days with:

• check if logging to disk is enabled and warn in the initial proximity step
• handling out of box device, match that packet you got and warn/tell how to get device going

bonus: I'll add support for the $5 "LYWSD03MMC" (https://www.aliexpress.com/wholesale?SearchText=LYWSD03MMC) when using this firmware: https://github.com/pvvx/ATC_MiThermometer