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November 19, 2012
If your phone can act as a hotspot, you can configure the ESP8266 to connect to your phone’s SSID. If not, you can set up the ESP8266 as an AP and connect your phone to it. In either case, there is a wealth of knowledge in the ESP8266 Community Forum at www.esp8266.com.
Is there any reason this would have issues on a Pro Mini @ 8MHz? I was thinking about using this as a primary input device in a wearables project, but I’m having issues getting reliable repeatability. Too often, the gestures aren’t registered within a reasonable timeframe. Trying the sample sketch, sometimes I get a response ~5-10 seconds after a gesture, but more often it’s not registered at all. Thoughts?
about a month ago
For those who’ve used this, exactly how precise are the measurements? Are we talking fractions of a millimeter? I see a lot of talk about accuracy in the comments, and I’m not sure if people are referring to accuracy or precision. Accuracy isn’t so important for me, as my needs are specifically measuring relative distance changes. So is there an actual spec for the precision/resolution, or can someone definitively post just how precise they’re able to get with their own tests?
about 10 months ago
Is the “peak” current synonymous with “inrush”? I have an actuator that has approximately 300 ms startup draw of ~10A, but under load is only pulling ~1.2A @ 12.6V. I don’t know what kind of tolerance or suppression this package has, but those are the parameters I’m trying to accommodate.
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about 2 years ago
“Check out the new Zero Point Energy Field Manipulator app I just downloaded. How does it work? Here… Let me show you!”
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about 2 years ago
Absolutely. I definitely don’t want to discredit having a thorough understanding of the schema, or XML in general. Pairing those abilities, like you said, reduces the hair-pulling moments substantially: knowing both would almost certainly bump up productivity.
This is a great explanation of the inner-workings of Eagle lbrs! I’ve run into this very problem myself. It turns out, if you run a built-in ULP, you can extract all the components from your schematic or board directly into their original respective libraries (or merge them into one unified library).
That would be: from your board or schematic view File -> Run (ULP) -> Open exp-lbrs.ulp -> Select export path -> Select whether to merge libraries -> Hit OK
Then, you can import the resultant libraries, pick them apart, reorganize them, etc. Note: older versions of eagle may have “exp-project-lbr.ulp” instead.
I think it’s important to understand the nuances of the xml involved in storing library data and the open possibilities for creating those custom scripts or programs to modify components. So Byron’s tutorial is still a great resource, kudos!
about 2 years ago
If you are referring to the 915 MHz freq. vs 434 MHz, chances are that the range and penetration will suffer slightly due to the higher frequency. The difference may not be noticeable if you use this in an open-air environment, but generally, higher frequencies are reflected more easily than low ones and require more power to cover the same area as a transmitter with a lower frequency.
Lots of variables play into the answer to your question (antenna type, obstructions, etc.). I can only speak to the 434 MHz model, however, which I was able to get about 200 meters in open air. What might interest you, if you need more range, is the RFM69 series. Felix at LowPowerLab.com claims to have achieved 250m with the standard RFM69W, but pushed the high powered version to +400 meters. http://lowpowerlab.com/blog/2013/06/20/rfm69-library/
Again, YMMV, so err on the side of caution if a wireless link is crucial in your project.
I can tell you that it is possible… it doesn’t look particularly nice, though. I did this on a few of the 434 MHz transceivers so they were nice and 0.1" spaced, but in all honesty, it was ugly and made the transceiver stand about .5" off a breadboard. It seemed to work better than soldering jumper wires to each pad, but it’s far better to use a BoB or design your own pcb with the correct spacing.
Let me know if you want photos of my attempt on the 434 MHz module.
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