https://github.com/bellrichm/WeeWX-MQTTSubscribe/wiki/json-example
On Wednesday, November 26, 2025 at 10:24:29 AM UTC-8 Dr__Bob wrote:
> Hi Guys (and Gals, of course!),
>
> I have a Qingping AirMonitor Lite that can be set up to emit MQTT
> messages. Great! It took a while with many trials and errors, but it is
> now functioning, and mosquitto_sub shows a typical message:
> qingping/MAC/up
> {"type":"17","id":1756,"need_ack":0,"mac":"MAC","timestamp":1764173842,"sensorData":[{"timestamp":{"value":1764173700},"temperature":{"value":22.56},"humidity":{"value":45.07},"co2":{"value":635},"pm25":{"value":1},"pm10":{"value":3},"battery":{"value":100}}]}
>
> The topic is "qingping/MAC/up" and the message is clearly formatted as
> json. So, now to get the relevant data points (pm25, pm10, co2 at a
> minimum) into weewx. It looks to me like Rich Bell's WeeWX-MQTTSubscribe
> could work, but I'm stymied by the (too?) many layers of the json. Why the
> Qingping folks didn't just code the message as
> {"type":"17","pm25":1,"co2":635 ...} I don't know. Anyway, type=17 is what
> I need to parse. There are other types, but they just contain
> configuration data (such as wifi SSID, etc). I *think* I need something
> along the lines of:
>
> [MQTTSubscribeService]
> [[message_callback]]
> # The 'type' of the message content.
> type = json
> [[topics]]
> # The WeeWX unit_system of the incoming data.
> unit_system = METRIC
> # The topic(s) of interest.
> [[[qingping/MAC/up]]]
> # This identifies a field, 'type', whose value is appended to
> every field in the current MQTT message.
> # For additional information see,
> https://github.com/bellrichm/WeeWX-MQTTSubscribe/wiki/Configuring-additional-options#msg_id_field
> msg_id_field = type
> [[[[sensorData_17]]]]
>
> But then I don't know how to continue. Do I just keep "punching" down and
> do something like
> [[[[[pm25]]]]]
> [[[[[[value]]]]]]]
> name = pm2_5
> or something similar or something completely different?
>
> TIA!!!!
> Bob
>
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