mqtt-all.py example: use retained publications #118
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Per [the change I suggested to the Pico-based Enviro code](pimoroni/enviro#2), with this change, the MQTT messages will be published with the retain flag set, so that if a consumer is not subscribed, the most recent set of readings can still be read by a future subscriber later. This supports the [homebridge-enviroplus plugin](mhawkshaw/homebridge-enviroplus#2 (comment)) better, so that a publication is more likely to exist on the topic even if the Pi with Enviroplus / this example code is not running at the time. Additional update to consider would be to align the message data formats between this sample and the newer Enviro product line.
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Good idea, thank you! |
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Per the change I suggested to the Pico-based Enviro code, with this change, the MQTT messages will be published with the retain flag set, so that if a consumer is not subscribed, the most recent set of readings can still be read by a future subscriber later.
This supports the homebridge-enviroplus plugin better, so that a publication is more likely to exist on the topic even if the Pi with Enviroplus / this example code is not running at the time.
Additional update to consider would be to align the message data formats between this sample and the newer Enviro product line.