Mike WOk, just noticed the board was draining unusually fast. A quick multimeter check revealed it was drawing 10mA. What?!
I suspect it's to do with using the TX/RX pins to drive LED(s) which in turn prevents the CP2104 Serial chip from sleeping. That chip has a quiescent current of about 7mA so that roughly adds up to the 10mA we're seeing.
I'm currently considering my options.
a) Re-wire the two led(s) to 2 of the pins currently used by the RGB push button. We'll lose yellow and green colors, but at least we can still indicate charging status by flashing the LED(s) and still use them as a battery level indicator.
c) See if we can fix this via firmware. ie. only setting pin to output mode just before we need to light up a LED. My multimeter broke so will be a few days until I can verify this works.
I also tried Charlieplexing to drive 4 LEDS with 3 pins but that doesn't work since we're delaying the board at the end of the loop to sleep.
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Yeah and I thought I was finally done. Btw I soldered a whole board before I found out the case won't close if you used headers (even the shorter ones).
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Haha, thanks for the feedback. I was eyeballing it and feeling nervous.
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yeah, it's all or nothing over here. I must be on my 5th feather or something. Are you doing the whole build, even with the RGB button?
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No, thanks to your quick updates I'm going to order the v4. The power consumption is great, and I wasn't looking to add the button even with th v2. I'll build out the v4 and let you know how it goes.
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if you wait another day I can confirm v4 numbers when my meter gets fixed.
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sgtm (sorry, hackaday.io won't let me reply more than two deep)
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That's a shame.
Been following the project (but not close enough apparently ;), and just got my V2 from OSH Park this weekend. Oh well. At least I settled the "should I use female headers for the NRF52 feather" question :)
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