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to judge if there is dampness around the sensor
see our document on Addressing Electromagnetic Interference
The sensors communicate over I2C and one INT output pin from each sensor is broken out
ATmega8A datasheet
Dissolved Oxygen Circuit is used to confirm that Dissolved Oxygen Probe is working properly
R602A Netvox LoRaWAN Wireless Siren Frequency:AS923 MHz to judge if there isR602A Netvox LoRaWAN Wireless Siren R602A is an intelligent wireless alarm that can communicate with other devices through LoRaWAN wireless network. It has high power speakers and high brightness LEDs for sound and light alarms. It uses SX1276 LoRaWAN wireless communication module. Features: Wireless Range Of 10 Km LoRaWAN Class A Compatible Frequency Hopping Spread Spectrum (FHSS) Improved Interference Immunity Improved Power Management For Longer