Communication card for freely connecting PLC (Programmable Logic Controller) with Internet of Things and mutually communicating

The utility model relates to the technical field of PLC communication, in particular to a communication card with a PLC freely connected with the Internet of Things and communicating with the Internet of Things, which comprises a 3.3 V power supply, an ESP-12F processor and a 232 communication interface, the 3.3 V power supply is electrically connected with the ESP-12F processor, the 232 communication interface is electrically connected with the ESP-12F processor, and the ESP-12F processor is electrically connected with the ESP-12F processor. According to the utility model, the external interface of the existing Internet of Things access chip ESP12F is subjected to secondary design, the original embedded Internet of Things chip ESP12F is subjected to communication standardization by using the MAX3232 chip, and the standardized communication is standard RS-232 communication. After the PLC is connected with an Internet of Things communication card, AT instruction control can be used, and the purpose that the PL