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see our document on Addressing Electromagnetic Interference
high sensitivity and air waking up
ATmega8A datasheet
communicate with phones
R602A Netvox LoRaWAN Wireless Siren Frequency:AS923 MHz see our document on AddressingR602A 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