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How to get weather telemetry with a BME280 on your Meshtastic Heltec V3.
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- Опубликовано: 13 авг 2024
- 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:
www.amazon.co.uk/dp/B077PNKCQ...
And someone who explains in mostly English..thanks!!
Straightforward easy to follow explanation. Thank you.
Would love to see a video on your solar build!
Great video and I love the format; short and sweet to the point.👍
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.
I have used it to measure the temp of my beehives so useful for some tasks.
Environmental data has loads of uses.
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!!
Awesome video👍 and another 100% essential purchase😆
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
Twisting wires only works IF it's a balanced signal. This doesn't appear to be.
And twists per cm has to be optimum. This one was too tight.
@@Y100001 looks good though.
I would pull the twisted pair from a cat 5 cable
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!!
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-
If there's one thing I've learned with anything to do with RF, it's twist ALL the wires.
Fantastic,,,
what meshtastic firmware are you using to use pins 41 and 42? or how did you configure the pins to work?
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?
Spec sheet says "Supply Voltage: 1.8 - 5V DC"
Is that weather data showing conditions inside the case or outside the case? I couldn't tell from the view.
So the BME is inside the case, but the case itself is not airtight. The push button underneath is not waterproof/airtight and allows atmospheric change within the case. The button is recessed in a mount which prevents water ingress. Unless submerged, water is not getting in.
Which case is that buddy? Also, nobody mentions which module it is, 3.3V or the 5V version sorry to have to ask.
Hi Dave. The case is just one of my own creations. The BME is the 5v version. I've got 4x of these now fitted across a few different LoRa boards, and they all work flawlessly.
Any ideas on how to connect a buzzer that will activate as soon as the temperature reaches a set value like a temperature alarm?
IFTTT could help
Your link is for the 5v board, but these devices have a logic level of 3.3v right? It would be unwise to overload them with 5v, they may not all tolerate the overvoltage.
But besides that absolutely great video thank you! :-D
I was just thinking about this - the boards I can see have 2 models a 3V and 5V - I am using 3V for a gps module, so I guess using the clear 5V pin would be simple
@@recom273 There's a 5v power pin as well as a 3.3v power pin, it's there so the board can share it's 5v input power with other devices, but the logic level inputs on the ESP32 expect 3.3v, so that's what I'd stick with 😃
Interesting- thanks for the info. Makes sense. Can I jump a gt-u7, ky-40 and bme280 module all from the same 3.3v pin?
Does it make a huge difference being inside the box in terms of accuracy? I imagine the various component can get quite warm over time.
@@apted I guess you would need some kind of airflow to the outside world for accurate temperature records. Barometric pressure less so.