Arduino Nano IoT & Relay

I've been created the auto-watering system for my orange tree and first made it on Arduino Nano & ESP8266. I've decided to do a system more compact and tried to use Arduino Nano IoT 33 (and Node MCU before it). But when I wanted to do it, I got the problem. Standard voltage for Nano IoT is 3, 3V, and most parts of relays are working with 5V. I've tried to use MOSFET but think it needs 5V too.

What I've tried:

1. Ordered 3, 3V relay on Aliexpress. But, because of the virus, they have significant delays with delivery.

2. Bought relay in the local store (it's said that their relay can work with 3, 3V), but with Nano IoT, it doesn't work. Interesting that relay works with Arduino UNO, both 3, 3V and 5V outputs.

3. Solve the problem! I've taken 5V relay, removed the central resistor and put 10K trimmer on its place. I took trimmer from my starting kit)

After that my Nano IoT can manage relay!