The LoRaWAN blue-green algae transmitter is a device used to measure the concentration of blue-green algae in water; Adopting the principle of fluorescence, it is more efficient and fast compared to traditional manual counting methods, and can be monitored in real-time online; Internally added filtering algorithm, with strong resistance to external light interference; Built in temperature transmitter, capable of automatic temperature compensation Supports LoRa TDMA networking and standard LoRaWAN protocol.