Plug in the Gemma. Go to Tools>Ports. Not visible.
try with a Trinket Pro (5V). Tools>Ports does not see it.
Plug the Uno back in. Tools>Ports sees it immediately.
I am using a Mac AirBook, running Mac OS 10.11.4 (El Capitan).
My USB cable is still warm from its Adafruit packaging (Its label says PID 4867, but I don't believe that...and it is too risky to try to go find the actual Adafruit PID) so I have no reason to suspect the cable. The Trinket has been used for a number of breadboarding setups, but normally I program it with a BlueFruit on the FTDI pins. The Gemma I bought a couple weeks ago.
So why are my two MicroUSB computers "invisible"? (And before somebody suggests it, the power switch on the Gemma V2 is ON, and I have a bright green LED and a much dimmer red LED, It has takeouts on 3Vo to +V on a NeoPixel strip, GND to the GND pin of a NeoPixel strip, I have a 1000uf capacitor at the strip between +V and GND, and a 470ohm resistor between D2 and the DIN pin. The Trinket Pro has no connections on it at all. I get the bright green light on the Trinket,
One of my two USB ports is already in use, so I have used the same USB-A connector for all tests with all cables and all boards.
[Later edit: The Micro-USB cable is Adafruit #592, ordered 22-Jun-16]
[Further update: I carefully manipulated one of the Gemmas in my latest order, so that its USB connector pointed to the opening in its antistatic bag. I then plugged the USB cable into it. Still within its antistatic bag. Went to Arduino>Tools>Port. Not visible. Green power light is on. Repeat the same test I applied for the first board: hit reset button. Red LED comes on. Within 10 seconds, I drop down Tools>Port. No sign of a port other than a Bluetooth input port]
[/dev when examined from Terminal tells me nothing new, but lists a lot of probably unused TTYs
Code: Select all
Josephs-MacBook-Air:~ flounder$ cd /dev
Josephs-MacBook-Air:dev flounder$ ls
afsc_type5 ptyw7
auditpipe ptyw8
auditsessions ptyw9
autofs ptywa
autofs_control ptywb
autofs_homedirmounter ptywc
autofs_notrigger ptywd
autofs_nowait ptywe
bpf0 ptywf
bpf1 random
bpf2 rdisk0
bpf3 rdisk0s1
console rdisk0s2
cu.Bluetooth-Incoming-Port rdisk0s3
disk0 rdisk1
disk0s1 stderr
disk0s2 stdin
disk0s3 stdout
disk1 systrace
dtrace tty
dtracehelper tty.Bluetooth-Incoming-Port
fbt ttyp0
fd ttyp1
fsevents ttyp2
io8log ttyp3
io8logmt ttyp4
io8logtemp ttyp5
klog ttyp6
lockstat ttyp7
machtrace ttyp8
null ttyp9
pf ttypa
pfm ttypb
profile ttypc
ptmx ttypd
ptyp0 ttype
ptyp1 ttypf
ptyp2 ttyq0
ptyp3 ttyq1
ptyp4 ttyq2
ptyp5 ttyq3
ptyp6 ttyq4
ptyp7 ttyq5
ptyp8 ttyq6
ptyp9 ttyq7
ptypa ttyq8
ptypb ttyq9
ptypc ttyqa
ptypd ttyqb
ptype ttyqc
ptypf ttyqd
ptyq0 ttyqe
ptyq1 ttyqf
ptyq2 ttyr0
ptyq3 ttyr1
ptyq4 ttyr2
ptyq5 ttyr3
ptyq6 ttyr4
ptyq7 ttyr5
ptyq8 ttyr6
ptyq9 ttyr7
ptyqa ttyr8
ptyqb ttyr9
ptyqc ttyra
ptyqd ttyrb
ptyqe ttyrc
ptyqf ttyrd
ptyr0 ttyre
ptyr1 ttyrf
ptyr2 ttys0
ptyr3 ttys000
ptyr4 ttys1
ptyr5 ttys2
ptyr6 ttys3
ptyr7 ttys4
ptyr8 ttys5
ptyr9 ttys6
ptyra ttys7
ptyrb ttys8
ptyrc ttys9
ptyrd ttysa
ptyre ttysb
ptyrf ttysc
ptys0 ttysd
ptys1 ttyse
ptys2 ttysf
ptys3 ttyt0
ptys4 ttyt1
ptys5 ttyt2
ptys6 ttyt3
ptys7 ttyt4
ptys8 ttyt5
ptys9 ttyt6
ptysa ttyt7
ptysb ttyt8
ptysc ttyt9
ptysd ttyta
ptyse ttytb
ptysf ttytc
ptyt0 ttytd
ptyt1 ttyte
ptyt2 ttytf
ptyt3 ttyu0
ptyt4 ttyu1
ptyt5 ttyu2
ptyt6 ttyu3
ptyt7 ttyu4
ptyt8 ttyu5
ptyt9 ttyu6
ptyta ttyu7
ptytb ttyu8
ptytc ttyu9
ptytd ttyua
ptyte ttyub
ptytf ttyuc
ptyu0 ttyud
ptyu1 ttyue
ptyu2 ttyuf
ptyu3 ttyv0
ptyu4 ttyv1
ptyu5 ttyv2
ptyu6 ttyv3
ptyu7 ttyv4
ptyu8 ttyv5
ptyu9 ttyv6
ptyua ttyv7
ptyub ttyv8
ptyuc ttyv9
ptyud ttyva
ptyue ttyvb
ptyuf ttyvc
ptyv0 ttyvd
ptyv1 ttyve
ptyv2 ttyvf
ptyv3 ttyw0
ptyv4 ttyw1
ptyv5 ttyw2
ptyv6 ttyw3
ptyv7 ttyw4
ptyv8 ttyw5
ptyv9 ttyw6
ptyva ttyw7
ptyvb ttyw8
ptyvc ttyw9
ptyvd ttywa
ptyve ttywb
ptyvf ttywc
ptyw0 ttywd
ptyw1 ttywe
ptyw2 ttywf
ptyw3 urandom
ptyw4 xcpm
ptyw5 zero
ptyw6
Josephs-MacBook-Air:dev flounder$
Any ideas about what I'm missing here? Or are both computer boards dead?
joe