Arduino-Compatible Nano V3 - CH340 USB, ATmega328P Pre-Soldered mq-135 product-copy h2 + table{ font-size:

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or Leonardo according to Adafruit

Humidity Sensor Module - HR202 x1: Humidity Sensor Module - HR202 x1

One thing comes in mind to upgrade to an Arduino Mega

Arduino-Compatible Nano V3 - CH340 USB, ATmega328P Pre-Soldered mq-135 product-copy h2 + table{ font-size:Arduino boards have different kinds that fit different applications. One variety of these boards is the Nano. This board is compact and used for small scale projects, but it also has the capabilities of an Arduino Uno. The primary differences between them are the size and the type of USB cable used for uploading programs. This board has an integrated CH340 chip, which is also used in ESP boards and clones of the Arduino Uno and Mega. It has 22 I O