I followed the diagram on instructables.com and when I conect everything and plug it in the CPU of the ESP gets warm.
Am I overheating it or is this normal?
As described above, the radio modules (notably the PA+LNA versions) are reliant on a stable power source (Arduinos 3V3 is not stable in this application). While these modules may work with a poor power supply,
they often lose packets or fail to receive as many as a module with a better power source. Moreover, this can sometimes be seen in odd ways such as the radio module working better when touched. This again is likely a power stability issue because the radio module is missing a capacitor (a commonly neglected expense on behalf of the module's manufacturer). Use an external power supply. I know many posts show using the 3V3 from the Arduino, that is not correct but sometimes you get lucky.
The overheating is probably caused by the 5V from the Arduino going into the port pins and or you have it connected to 5V not 3V3. Normally this will destroy the unit.
I fixed It allready
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