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ESP32-WROOM-32:


The WROOM's use the original ESP32 module, which has older/slower wifi and bluetooth, and is "not recommended
for newer designs". But they're also dirt cheap, and have lots of pins. The WROOM-32 board does have an
onboard, user-addressable (blue) LED (on GPIO2) but unfortunately the wifi library uses GPIO2 for its activity,
so it flashes constantly when you're using wifi.

I'm testing a green LED (with a 1k "102" resistor) between D13 and GND as my activity light.



ESP32-WROOM (3pcs for $17 at Amazon)

ESP32_3_leds_off	ESP32_3_leds_on	ESP32-WROOM (3pcs)	ESP32-WROOM D13 LED added	ESP32-WROOM	ESP32s WROOM-32 pinout

ESP32_3_leds_blinking.MOV (2 MB)

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last updated 02/05/2026 at 14:08:08 by make_www_index.command version 2026.02.05.A