Discuss here different C compiler set ups, and compiling executables for the ESP8266
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By Squonk
#84
hackrid wrote:what's your preferred procedure when doing so? are you glueing the wires down some how? can you share some pictures of your work with us?

You need to use ultra-thin (0.05 mm) enameled copper wire, like this one:
http://www.conrad.de/ce/de/product/6075 ... 0-m-Conrad

You first burn one end with the soldering iron until it smokes, meaning the enamel isolation is gone, then apply solder to it, then solder it to the QFN pin with some flux (pen): the solder will flow below the chip by capillarity and make a good enough solder joint.

If you are lucky (like it seems to be the case with the ESP8266), the pins have a small sidewall protrusion on the chip side, so solder doesn't need to flow below the chip.

Once you have all the wires correct, have them hot glue blobbed for better mechanical strength.

But I found an AliExpress shop selling ESP8266 modules with all pins broken out to pads:
http://www.aliexpress.com/store/product ... 76346.html

Detailled pinout can be guessed from this other shop picture:
Image
http://item.taobao.com/item.htm?spm=a1z ... 0328222213

I ordered 5 from them, so it looks like we will not have to do micro-surgery 8-)
User avatar
By RichardS
#86 I am a 30 year veteran of the electronics game and yes you can solder wires to a QFN, but its very tricky for the average Joe.... the modules linked to that Aliexpress site are the best for using, they seem to have all pins routed out to side castellations... (pins). So with the right micro gauge wire and very small soldering tip and lots of flux helps too.... it can be done.

Richard.