Hi all,
I am making a pinout for the pads on the bottom, hoping to find some extra pins we can use.
There are 2rows x 25 pads = 50 pads on the bottom (See blue text on image).
The headers + SD Card expose 2x16 + 8 = 40 pins.
So we have 10 extra pins to discover.
I already found a lot, but still missing some, I am hoping someone (maybe onion themselves) could help me identify the missing pins.
I made a sheet here:
@WereCatf Where are you from, maybe i can take one from your hands? 
Or you can use them to master the black art of smd 
I think this topic should be a sticky.
With the next batch kickstarter/indiegogo users coming I forsee a lot of can't connect/wifi/power topics, this can be a (help) topic for user facing power problems.
When I received my Omega2+ I had the problem that after 20 seconds the led went out.
I used the recommended lm1117, breadboard and wires as power supply.
After some advice on this forum, i shortened the wires from 20cm to about 5 cm each and I added a 470uF 16v Capacitor.
I finally saw the Wifi Acces point in windows so i:
Hi all,
I am making a pinout for the pads on the bottom, hoping to find some extra pins we can use.
There are 2rows x 25 pads = 50 pads on the bottom (See blue text on image).
The headers + SD Card expose 2x16 + 8 = 40 pins.
So we have 10 extra pins to discover.
I already found a lot, but still missing some, I am hoping someone (maybe onion themselves) could help me identify the missing pins.
I made a sheet here:
btw any idea how different pins can be assigned to the same function?
What would happen (if even possible) if you changed all pins to the same function?
For example, GPIO#46, GPIO#19, and GPIO#15 can all be assigned to PWM_CH1.
@luz
Thank you for the great info, I changed the image accordingly. (groups between parentheses and gray are possible groups when enabled in omega2-ctrl utility)
The datasheet helped me a lot to figure out and understand some more about the Omega2.
I tried to figure out the pins on the bottom of the Omega2, to see if it was placed for factory programming, debugging or it exposes other pins that are useful. (still haven't got them all)
Have a look: BOTTOM PINS
The omega2-ctrl utility is indeed like the Linkit Smart, it would be better to remove the options that are not relevant, I think they are only confusing.
I hope they accept your pull request or at least show a sign.
They should be lucky and embrace helpful people. :angel_tone2:
22-03-2017 scheme + image updated.
25-03-2017 scheme + image updated.
Does anybody know which group contains which pins?
I already added a few to the attached image, please confirm and add if you can.
root@Omega-2p:/# omega2-ctrl gpiomux get
Group i2c - [i2c] gpio
Group uart0 - [uart] gpio
Group uart1 - [uart] gpio
Group uart2 - [uart] gpio pwm (Pins not exposed)
Group pwm0 - [pwm] gpio
Group pwm1 - [pwm] gpio
Group refclk - refclk [gpio] (Pins not exposed)
Group spi_s - spi_s [gpio]
Group spi_cs1 - [spi_cs1] gpio refclk
Group i2s - i2s [gpio] pcm
Group ephy - [ephy] gpio (Pins not exposed)
Group wled - wled [gpio] (Pins not exposed)
Alright, guys thanks for the fast feedback.
I hope people with this problem will check their power supply first and get their Omega running.
Happy Inventing
@ccs-hello It is connected the same way as described in the Omega2 manual and which Onion recommends.
Unfortunately, I can't test if this will solve the problem because mine is (fortunate for me) working now.
Maybe other people with the same issue can try using shorter wires or even create a simple PCB with the lm1117, getting rid of the breadboard.
Anyway, thanks @css-hello for helping out.
