So for this log I am going to write about the changes I have made for the second version of the board. 

Lets start with the front.

• The most obvious thing is that we went to green color.
• Add a second button. This will help with navigation.
• Moved the LED next to the USB. Also I chose a bigger package. This way I can put it in line with port and have the D+/D- lines pass between the pads for the LED.
• I chose e different style of buttons. The one I had in the begging was EVQ-P6PB35 from Panasonic. It was very slim and small. Too slim and too small. Very hard to push. The ones I got next had a little stem, which improved the experience. And have some ingress protection. 
• I had some resistors and caps on the front for the button debouncing and for the LED. They went to the back of the board. 

Lets move to the other side.

• Fix the ordering of the pins on the flat flax connector.
• Connected the ground pin on it as well.
• Put the correct transistor footprint. 
• Removed the temp sensor for the e-paper display. It is not needed.
• Changed the LDO because the BGA one was pain to solder.
• Moved the debug header so it does not interfere with the radio.
• Removed the RST pin on the debug header and connected it to the second button. It can be configured as a GPIO.(this is not done on this revision)
• Added that low frequency crystal I deleted on the first version.
• Add a fuel gauge for the battery.
• I removed the battery over current protection IC. It was a bad choice from the begging. 
• Changed the trace that is going to the antenna. Now it has the correct impedance. 
• Moved some components around to have cleaner look. 

More or less that were the changes. Thank you for reading my logs. 

Cheers,

Mitko