Member #355246

Member Since: August 24, 2012

Country: United States

  • How to put this politely...this tutorial and the code associated with it is terrible. First off, the code is filled with compile errors that I had to track down and fix. Neither this tutorial nor the associated Pro RF tutorial explain how the two are supposed to work together. After an hour or so (!), I finally got the code compiled and loaded** I the have a known, working device sitting in the same room, and about 1 in 10 messages successfully get to the gateway (according to the "web interface"). But none of them get to TTN. I guess I should have been wary when I saw "we've had the best luck with..."

    I cannot possible recommend this product to anyone. It is simply too much work to try and get running.

    **This was a while ago and now it won't compile again (because a library got updated?)

  • Can you explain what do the LoRaWAN jumper really do? I ask because they don't seem to make a difference in some preliminary tests (in fact, we lost the ability to send data to TTN when they're closed, but anecdotally, we can when the jumpers are cleared).

  • Is the schematic correct in that the voltage regulator is driven by VCC from the mini and not VIN (or "RAW")? That seems like a colossal mistake, since after the drop-out voltage many GPS's will be right at their lower voltage limits.

  • Am I missing something? Why doesn't this use IOREF for the high-side voltage, which is put there specifically to allow shields to be used interchangeably with 3V3 an 5V Arduino varieties? Sure, I can rewire some things, but it makes no sense to do it this way.

  • Indeed. C'mon SparkFun, update your tutorial already.

    Not only are the gyro and accelerometers decidedly left-handed (not sure why ST did this), but the magnetometer is right-handed (opposite x-axis from the accelerometer). Incidentally, you can change the gyro to right-handed readings, but not the accelerometer. (-1) will be your friend if you want to implement an AHRS...

  • I have the earlier version -- you should consider a version that has independently selectable voltages: so you can have, e.g., 3V3 on one side and 5V on the other.

  • Why don't you use the IOREF pin on this shield (and others)? Then we could easily use it with 3.3V systems. I suppose I can clip pins and do some soldering, but still...

    Also, putting a light sensor on the same PCB as a temperature sensor makes no sense. You need to shield the temperature sensor from the sun!

  • C'mon, y'all. Can you not get a decent datasheet after all of these years?

  • Could you either tell how to fix the flippin' sync errors once and for all or replace these with the newer version? How many rabbit holes do I have to go down to get an answer?

  • "Note: Although the enclosure is labeled as an Imax B6, this is not the same charger as the more expensive charger by the same name."

    Wait. Is SparkFun selling counterfeit chargers?

No public wish lists :(