In R404 Not working (enumeration and power brown out) @ryanHologram mentions “Our conversations with u-blox and further testing continue to show that the R404 is not ready for prime time production scenarios”. Are there issues other than the re-enumeration stuff?
Also, I’m puzzled by the continuous mentions of power consumption. The R404 and R410 are LTE-only and they power consumption is actually pretty darn low! Is this just because you guys can’t keep 3G and LTE Cat-1M apart?
Specifically, the R404 and R410 accept Vcc in a wide range (3.2V-4.2V) and the peak current during TX is 490mA, avg max being 190mA. A 400mV voltage drop is allowed during TX. This should not be that much of a burden on an rPi unless you’re running the rPi itself very hot at the same time (unlikely when people are testing as in the mentioned thread). Note that when using 2G (not avail on the R404/R410) the peak TX current is 1.9A, yowza!