Read the statement by Michael Teeuw here.
Possible to display temperature from another area?
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@sdetweil I have nothing right now, as I don’t know what type of sensor could send the temperature upstairs.
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@Cliff365 well, the mqtt type communications sends via a shared queue. many sensors use that, or can be attached to hardware that can do that… I have some temp/humiduty DHT-22 connected to ESP8266 processor boards to send data… because of the queue timing is not so critical, data doesn’t get lost
an example
https://cedalo.com/blog/how-to-use-mqtt-on-esp8266/
https://www.youtube.com/watch?v=c1st5cVRRzo -
@Cliff365 Sparkfun puts out a couple of devices, one is called an Endpoint and the other is called a midpoint and each type of device is made to use QWIIC connectors which is some sort of JST connector but the end point and midpoint also has an ethernet plug.
You daisy chain sensors from an endpoint/midpoint then get an ethernet cable plug it in and plug in other end to you Pi’s ethernet plug.
Hardwired because of the ethernet but supposed to be able to handle some pretty good distances.
Only works with I2C -
@ankonaskiff17 thanks! I will take a look.
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@Cliff365 Pretty straight-forward. I have Pi 4 connected to an Endpoint to connect 3.3V, Grd, SDA, SCL.
From Enpoint I have a short ethernet cable to the Midpoint then another short ethernet cable to my 2nd Endpoint.The description and functionality on Sparkfun’s site made it sound more complicated than it was in real life,
The Endpoints and Midpoints each have QWIIC female plugs and with I2C you can daisy chain multiple sensors together. You just have to be mindful of the device addresses.
I’m using duplicate sensors for temperature, barometric pressure, humidity for Indoor vs Outdoor readings. 1 sensor captures all 3 readings but it also has a solderable jumper pad to resolve the address issue.The purpose of the Sparkfun devices is to give you the ability to transmit I2C data over some pretty good distances. Like 100+ ft.
They explain how they get that amount of distance but way over my electronics hardware pay grade.
