A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the RF traces as short as possible and use a 50-ohm impedance-controlled line to the antenna.
Use a unique device ID for each device, implement a robust communication protocol with error checking and retransmission, and ensure that the devices are properly synchronized.
The maximum transmission distance depends on the environment, antenna design, and transmission power. In ideal conditions, the SR05.TCT can achieve a range of up to 10 km. However, in practice, the range is typically limited to 1-2 km due to obstacles and interference.
Use a 1/4 wavelength monopole antenna or a dipole antenna with a 50-ohm impedance. The antenna should be designed to operate at the desired frequency band (e.g., 868 MHz or 915 MHz) and should be matched to the SR05.TCT's output impedance.
The power consumption of the SR05.TCT varies depending on the operating mode. In transmit mode, the current consumption is around 40 mA. In receive mode, it is around 20 mA. In sleep mode, the current consumption is typically in the range of 1-10 μA.
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