Brain surgery for the ESP-01S
When it arrived, the ESP-01S was a mighty upgrade from the ESP-01, chiefly doubling the flash memory from 512KB to 1MB. Also, a nice onboard LED!
There are 8-pin 4MB flash chips available which continue to be a cheap source of extra programming space for some projects.
For instance, on this blog (and YT video), I've taken a look at how these budget chips can be used as extra storage for the Arduino Uno.
For around AU25 cents each the 25Q32FVSIG 4MB ICs can be swapped in for the 1MB ESP-01S versions and, if the solder gods are with us, increase the program space available.
Note that I believe that the ESP8266 can only address a maximum of 4MB so my ideas of creating an IoT super-race may have (for now) been dashed.
In the meantime, from this website comes some code I "borrowed" to set up a webserver with a slider. When "slid", the server controls the PWM output of a GPIO on the device.
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