General area when it fits no where else

Moderator: Mmiscool

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By matherp
#35710 I just wanted to confirm that it is possible (and easy) to upgrade the memory on a ESP-01 module.

I bought these 4Mb chips and they work as expected.

The 512k ESP-01 use a SOIC memory whereas all the higher density memory is SOIC-W (wider) . However, it is still possible to solder them in place. Remove the old chip - I use a heat gun with a very fine nozzle. Then bend the pins on the replacement chip underneath it. It can then be soldered to the ESP-01. The more modern 1M ESP-01 are laid out to use the wider chip so are even easier to upgrade.

All setting etc. will be lost so you will need to reflash and then connect on to set up again.

All the ESP modules can be upgraded. In the case of the ones with shields over the chips this is a bit trickier but with care the shield can be removed with the heat-gun and then the memory upgraded. The shield can also be replaced using the heat-gun.
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By krzychb
#35722 Hi matherp,

This is great news that you have successfully done this hack - congratulations!

It looks like a good upgrade option for classic ESP-01 boards with 512K flash.

Since this involves some creativity :D to fit the new chip, could you, please, post a photo showing how the new SOIC-W chip fits in place of old SOIC on the board?

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By matherp
please, post a photo

The forum doesn't allow attaching photos and I don't use photo sharing sites - sorry
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By martinayotte
#35735 On ESP-01, I did the same, it is pretty easy by bending the soic-08w pins almost vertically and then soldering them with a plain soldering iron. Just needs to be careful to not leave any bridges.