Indeed a 10uF capacitor on the power rails fixed the issue. I'm seeing a slight dip in voltage ~100 mV when the radio turns on. Is that normal? The firmware behaves as expected.

Hi! Thanks for replying. This is how things are wired up in the breadboard. I use single core 22 AWG wires, roughly 5 cm long, directly plugged into the breadboard vertical power rails for all power delivery (battery to breadboard to voltage regulator; voltage regulator to ESP32). https://i.imgur.co...

Greetings, I'm trying to explore powering the ESP32 Devkit (WROOM-32) with a battery through the 3V3 connector, hoping to bypass the power-hungry AMS1117. To do so I use a 2Ah LiPo battery at 3.7-4.2V through a voltage regulator. I've tried both a Torex XC6210B332MR (700 mA - ~100 mV dropout) and a ...