The invention discloses a catering lampblack online monitor
system based on dual-mode communication. The
system comprises a sensor interface circuit, a power
supply management circuit, a main controlMCU circuit, a dual-mode communication module M5313 circuit and a
liquid crystal display circuit, and the main control MCU circuit is connected with and controls the sensor interface circuit, the power
supply management circuit, the dual-mode communication module M5313 circuit and the
liquid crystal display circuit. According to the invention, a 2G and NB-IOT self-switching dual-mode communicationtechnology can be realized, the price of the communication module is not increased, the advantages of the 2
G network and the NB-IOT network are extracted; the NB-IOT network is preferentially networked, the
power consumption of the terminal is effectively reduced, and the high-
gain high-penetrability deep coverage capability of the NB-IOT network is utilized to solve the problem that the restaurant to be monitored is automatically switched to 2
G network communication in places such as basements where signals are difficult to reach, in urban and rural areas and without NB signals, so as to ensure the reliability of
data transmission of the monitored restaurant in various environments.