Wireless sensor Community building security Robot wireless control Industrial remote control and telemetering Automatic data acquisition Container information management POS system Wireless acquisition of gas meter data Vehicle keyless entry system PC wireless networking
Long-distance wireless transmission Working frequency range (433.4-473.0MHz, up to 100 communication channels) Maximum 100mW (20dBm) transmitting power (8 gears of power can be set) Three working modes, adapting to different application situations Built-in MCU, performing communication with external device through serial port The number of bytes transmitted unlimited to one time Update software version through serial port
HC-12 wireless serial port communication module is a new-generation multichannel embedded wireless data transmission module. Its wireless working frequency band is 433.4-473.0MHz, multiple channels can be set, with the stepping of 400 KHz, and there are totally 100 channels. The maximum transmitting power of module is 100mW (20dBm), the receiving sensitivity is -117dBm at baud rate of 5,000bps in the air, and the communication distance is 1,000m in open space. The module is encapsulated with stamp hole, can adopt patch welding, and its dimension is 27.8mm×14.4mm×4mm (including antenna cap, excluding spring antenna), so it is very convenient for customers to go into application system. There is a PCB antenna pedestal ANT1 on the module, and user can use external antenna of 433M frequency band through coaxial cable; there is also an antenna solder eye ANT2 in the module, and it is convenient for user to weld spring antenna. User could select one of these antennas according to use requirements. There is MCU inside the module, and user don't need to program the module separately, and all transparent transmission mode is only responsible for receiving and sending serial port data, so it is convenient to use. The module adopts multiple serial port transparent transmission modes, and user could select them by AT command according to use requirements. The average working current of three modes FU1, FU2 and FU3 in idle state is 80μa, 3.6mA an 16mA respectively, and the maximum working current is 100mA(in transmitting state).
The ESP-201 cards are programmable like Arduino cards and can communicate in wifi with other devices (computers, smartphones, etc.). There are several models, the ESP-01, the ESP-03, the ESP-12 ... and it is the ESP-201 that we propose.