|ESP-12E with Adapter Board|
- You really want a magnifying glass!
- Solder flux is nice to have but not essential.
- Mount the adapter plate on the header strips and insert in a breadboard before soldering.
- Tin two pins of the WiFi module at opposing corners and solder them first to hold it secure while soldering the others.
Despite all this I failed to solder a couple of the pins correctly at the first attempt; the magnifying glass to the rescue once again!
Frustratingly the adapter plate is exactly the wrong size for the breadboards I had at hand (too wide for a single one and too narrow for two side-by-side) so I had to connect it with male-female breadboard jumper wires. To program it, I found I had to connect the following pins:
- Gnd, GPIO15 and GPIO0 to FTDI Gnd
- Vcc, GPIO2 and CH_PD to FTDI Vcc
- TxD to FTDI RxD
- RxD to FTDI TxD
- Rest to Gnd (momentary, to return to program mode)
Note that my FTDI connector supplied enough current to power the board at 3.3v; you may not be so lucky.