As previously mentioned, a capacitor across the 3.3V and GND (I'd recommend 470uf, but 2000UF would probably work too). Would we be able to see a copy of your source code?

Hello. I'm trying to use a SIM800L GSM module with the TinyGSM library. I've taken the following example from a site online:

]#define TINY_GSM_MODEM_SIM800
#define SerialMon Serial
#define SerialAT Serial1
#define TINY_GSM_DEBUG SerialMon
#define GSM_PIN ""

#define NTP_SERVER "132.163.96.5 ...

I have the following module:

https://www.adafruit.com/product/6049?srsltid=AfmBOoq7DY6Av2TPlt7uQvXpd0pamO9SQb3-rglPJfZ86wf3UZiuYQ2c

And I'm running the following code:

#include <driver/i2s.h>

#define I2S_WS 2
#define I2S_SD 3
#define I2S_SCK 11

// Use I2S Processor 0
#define I2S_PORT I2S_NUM ...