htu21d

Smogly(formerly: Smogomierz) - simple and cheap PM 2.5 and PM10 sensor based on NodeMCU (ESP8266) or ESP32

Raspberry Pi Sensors

This is an Arduino library for HTU21D, Si7021 and SHT21 Digital Humidity & Temperature Sensor

HTU21D full function driver library for general MCU and Linux.

Weather Display (7.5in eInk) with an ESP32, indoor sensors, receiving data from OpenWeatherMap.org

Drivers and home automation projects for Raspberry PI.

An all-in-one ESP8266 based weather station.

Raspberry Tool for managing I2C modules. EEPROM (24c01-1024), PWM LED/Motor driver (PCA9632), I/O driver (PCA9557), Temp/Humid sensor (HDC1080, HTU21D), Fan controller with a PWM (EMC2301), Pressure ...

About This is an Arduino library for HTU2xD, Si70xx and SHT2x Digital Humidity & Temperature Sensor

ESP RCM - Room Climate Monitor with ESP8266, HTU21D, Si7021, AM2320

Nixie Library for clock development

A MagicMirror² module which peridocally calls configured scripts and sends the output as notification

Agent/device-based sensor mesh with a readable UI.

Homekit Compatible Temperature and Humidity Sensor - ESP32 - Arduino

BLE to MQTT Bridge using espressiff esp32 reading nRF52840 BLE-node. As a gateway includes Lux (BH1750), temperature and humidyty (HTU21D), CO2 and TVOC (CCS811)

Extended version of a WiFi Cloud Controller based on ESP8266 and Blynk, works with BME280, SHT3x, HTU21, DS18B20 probes for controlling temperature, humidity or both.

Environment control with Wemos D1 mini

Nordic Semiconductor NRF SDK drivers for various IoT peripheral modules such as HTU21D temperature sensor etc.

This is a MicroPython library for the Raspberry Pi Pico and the HTU21D Digital Relative Humidity sensor with Temperature output.