So I got bored today and decided to attempt to repair my Node MCU 12E Esp8266 which would heat up the WiFi chip. I had another WiFi chip Identical pinout so I removed it from a board that would no longer boot or power up from the cable. Looking at the back of the WiFi chip the pinouts were labeled exactly the same .When I removed the chip I lost the solder pad that is pin 6 of the chip that was connected to the Node MCU . As I researched the pinout it appears that it is GPIO12 and as far as I can tell it is connected to D6 on the Node Mcu.
I have loaded blink to the board and it is working, can someone tell me if I run a jumper wire to D6 is that all I would need to do to make this board work 100% again. Like I said ,blink works and the WiFi chip no longer heats up.
If that is where it came from, it should work just fine, it mainly depends on your skills. Having changed the chip I expect it to be successful.
I am sorry I don't quite understand your comment, "if that's where it came from". Just was asking if I were to solder a fine wire to D6 is there more to it or is there something else that may be affected by it not being connected. It seams fine so far just wondering if someone has more knowledge as to the pinouts?
Larryfos:
I am sorry I don't quite understand your comment, "if that's where it came from". Just was asking if I were to solder a fine wire to D6 is there more to it or is there something else that may be affected by it not being connected. It seams fine so far just wondering if someone has more knowledge as to the pinouts?
If those two points were connected originally it should work assuming nothing else is damaged.
Yuh, that's the correct connection - the NodeMCU team continued the stupid tradition of renumbering pins. Every team that brings a microcontroller board targeting the hobby market out, they just have to renumber the pins.
It should work. That said, your rework looks miserable!!!
Those pads are in incredibly bad shape. like, most of the pads on are damaged (partially lifted and still stuck to the nodemcu you took that out of, I suspect. And it's a damned good thing none of those ones on the bottom are connected to anything on the nodemcu, since they are all completely ripped off the board.
non-temp=controlled iron? lack of desoldering braid? Using lead-free solder? no flux? You may have gotten a working board this time, but you have got to get your process sorted out before you try it again.
That said, they aren't easy to remove. I was never able to remove those from a PCB in a reusable state within an amount of time I could justiify spending on an item with a replacement cost of $3 for a new nodemcu. Only time I was pulling those off I didn't need to save the ones I removed (they were DIO, and I was using them with Espruino where the intrepreter is a major performance bottleneck and QIO vs DIO is a direct 2:1 enhancement in performance), having no success with the iron, and with hot air taking forever, I just grabbed my butane torch and they came off real easy. The modules I removed were trash, but the boards I removed them from were fine unless I was sloppy. This actually works really well for pulling large chips off without lifting pads....You keep the torch much farther away than you expect to need to .
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