With these changes I should be able to mount the ESP8266 on the back of the PCB and.This will allow the display to be freely placed in the most appropriate location without respect to the positioning of the PCB. The OLED LCD doesn’t need to be on the PCB.The Pro Mini just needs headers to connect the FTDI Basic. Not horrible but really, this is such a simple project why waste the money? With my PCB at 8.8 x 5.3 inches that cost for a small production run (3 boards) would have been around $200. OSH Park charges about $5 per square inch. The size of the PCB makes it prohibitive to get made. The next problem came after the PCB was fully routed. The layout is about 8″ x 5″ which could be a bit pricey, not to mention difficult to fit in a decent sized enclosure.
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