Microchip RN2483 use

End Devices (Nodes) Hardware
21

I did something like this:

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22

nice ! Iā€™m not a pcb designer unfortunately ā€¦ :sunglasses:

23

@thinginnovations thatā€™s pretty cool! would it be possible to share that design somehow? Eagle file or something?

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I have a 2nd version Iā€™m getting made. Due to not being able to find a pcb footprint for the RN2483 I had to produce one myself. The pads were as specified in the datasheet but were a little too small to hand solder reliably. If this is ok then Iā€™ll be getting a few more made up and releasing the files for others to use. I wouldnā€™t want to publish a design that is not usable by others.

Andrew

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25

@thinginnovations: thx, looking forward! Iā€™m in the process of hand-soldering one of these guys and is a pain

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In the meantime, this guy from the Espruino community just started selling a breakout board for RN2483 on tindie: https://www.tindie.com/products/DrAzzy/rn2483-breakout-bare-board/

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27

Would be nice if we could reprogram the PIC18F46K22 inside the module, perhaps with the IBM code, for a self contained unit.
Or is the sourcecode for the PIC chip available somewhere? That would make a nice starting point.

28

I think for the LoRaAlliance certification, the PIC micro within the RN2483 will not be able to run user code. This is a similar situation with the MultiTech mDot modules where the micro can actually be reprogrammed, but to use the LoRaWAN part you must use the binary only library to keep the FCC/CE certification.

However if you are not interested in certified products and are using them in a private environment, then being able to reprogram the PIC micro within the RN2483 might be a cheap LoRa device. Anyone with the appropriate PIC toolchain should then be able to get this working.

Andrew

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29

LoRa Calculator,

For those of you who are interested in getting an indication of the relation between performance, sensitivity, energy consumption, it might be worth to look at:

http://www.semtech.com/apps/filedown/down.php?file=SX1272LoRaCalculatorSetup1'1.zip

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Microchip Technology to Buy Atmel for Nearly $3.6 Billion :sunglasses:

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31

Having lots of experience with these modules, sleep current is only 10uA

32

Which module - the RN2483 is only 10uA in sleep ?

33

yes and this has been measured

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Sleep mode consumption for the RN2483 has been all over the place - unless you have a new solution?

See Microchip errata: http://ww1.microchip.com/downloads/en/DeviceDoc/80000689A.pdf

  1. Issue: Sleep current out of specification
    Sleep mode current may draw 100-150 Ī¼A.
    Work around
    There is no work around for this issue. This issue will be addressed in a future firmware revision.

@BoRRoZ posted his here in the forums showing 40Ī¼A: https://www.thethingsnetwork.org/forum/t/power-consumption-and-range/1164/9?u=jmarcelino

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35

Im aware of this errata note and borroz experiments, not quite sure what im doing rightā€¦when is the next meeting for witnesssingā€¦who will bring his amp meter :slight_smile: