I recently purchased some CO Clicks, and unlike the first set I bought about a year ago, the headers were already soldered to the board.
The reason this didn't work for me is I designed a small board with both a CO Click and an Air Quality Click.
To minimize width I placed them on both sides of the board.
To minimize the total depth of the boards I did not use a plug in header but soldered the headers to the board directly.
I have 2 headers next to each other with them staggered on opposite sides of the board.
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This works fine, but if the headers are pre-soldered to the Click board you can't access all 4 headers to solder them to the main PCB. You have to solder all 4 headers in place
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