How to get weather telemetry with a BME280 on your Meshtastic Heltec V3.

In today's video, we cover how to fit a BME280 barometric pressure sensor to a Heltec V3 lora board, and set it up for use with Meshtastic.
This data can then be sent out over the mesh and seen by others.

BME280 link:

[markdoyle]

Thank you . Just getting started in Meshtastic went for the temp sensor wasted an hour til i found your video. Then great success

[sUASNews]

I have used it to measure the temp of my beehives so useful for some tasks.

[madcarew]

And someone who explains in mostly English..thanks!!

[leeewyk]

Straightforward easy to follow explanation. Thank you.

[paulizz]

Thank you for the video, just ordered one I'm going to give this a go, once we have the UK covered imagine harvisting that data to a database would be one amazing weather app!!

[quid]

This is great, I wonder what other applications tying sensors into the mesh could have. If air quality monitors could be used in place of barometers then I can imagine this being used by grassroots groups to deploy area-wide pollution monitoring across a town. Moisture sensors could make an off-grid early warning system for a flood-prone community. There's so much potential.

[gregspeakman]

Great video and I love the format; short and sweet to the point.👍

[SEVE_P]

Awesome video👍 and another 100% essential purchase😆

[JCrossMsM]

Would love to see a video on your solar build!

[spokekey]

just checked your guide as I am modifying my setup so its outside and eliminating 3M of RG58. Adding a bme280 so i can monitor how hot it gets in the box. Should be up and running by next weekend. Noticed N1b in the example, who is currently -126db. sj27

[KH]

I would pull the twisted pair from a cat 5 cable

[adamjensen]

How would you incorporate soil testing like the pH sensors or moisture sensors?

[andymorris]

Nice vid! Can you give us a breakdown of your handheld 3D printed case. I know what it's modeled after, just not with the window for the heltec and such. Possibly post the STL from the model? Thanks and keep up the great information and range testing!!

[yadon]

what meshtastic firmware are you using to use pins 41 and 42? or how did you configure the pins to work?

[andrewpaterson]

I want True Wind Direction off a floating Heltec into my Meshtastic nodes.
So i need the Compass Heading of the Heltec to get True Heading, then True Wind Direction. I would like a rugged Ultrasonic Wind Sensor but battery power will be very limited and it is more expensive. The Heltec will be on a bouy so is reasonably static but GPS will not produce a good enough heading. So a simple mechanical wind vane with at least 64 slots. 360/64 ~ 5 degree per slot would be a good starter project. Anyone done such a thing? .. with compass and wind direction ?

[suzyamerica]

Is that weather data showing conditions inside the case or outside the case? I couldn't tell from the view.

[TheOpinionatedYouTuber]

Question - you showed the BME280 that requires 5V for power. However, the Heltec v3 is powered by 3.3v (max 4.1v).

Is there any loss of accuracy since the BME280 isn’t running at the 5V it’s expecting?

[glynnetolar]

Twisting wires only works IF it's a balanced signal. This doesn't appear to be.

[charl-pietervandermerwe]

Any ideas on how to connect a buzzer that will activate as soon as the temperature reaches a set value like a temperature alarm?

[EmilyTestAccount]

There are also pliers with a small handle on the base you can pull out - this will spin around the wires while grabbed into the jaws

As for twisting helping - apparently yes! I was going to debate that these aren't differential signals but apparently it doesn't matter. These circuits still benefit from using twists to make the noise common mode over Signal and Ground just the same as Signal+ / Signal-