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 CO2 sensor that collects and sends its data via MQTT to a server. The board of the sensor is the Wemos D1 mini ESP32 and the sensor is a SCD41.
 
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 ** Pinout of the board
 
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 ** Dependencies
 - [[https://github.com/Sensirion/arduino-i2c-scd4x][Sensirion I²C SCD4X Arduino Library]]
-- [[https://github.com/knolleary/pubsubclient][PubSubClient]]
+- [[https://github.com/marvinroger/async-mqtt-client][Async MQTT client]]
 - [[https://github.com/bblanchon/ArduinoJson][ArduinoJSON]]
 ** Configuration
 
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