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  • Q
    What factors are related to BLE transmission distance, and how to estimate it?
    A
    Unlike other wireless technologies, BLE technology is designed to support a wide transmittable range between two devices, giving developers maximum flexibility to create wireless solutions that best meet the needs of their target use cases. Effective, reliable transmission distances between Bluetooth devices range from about one meter to more than one kilometer. BLE transmission distance will be affected by many factors as follows: Transmitting Power: The higher the transmit power, the more likely it is that the signal will be received at a greater distance, and the BLE transmission range will be longer. However, increasing the transmit power increases the power consumption of the device. Bluetooth technology supports transmission power from -20dBm (0.01 mW) to +20dBm (100 mW). Huapu micro-Bluetooth products can support a maximum transmission power of +20dBm on a single chip without adding a PA. Receive Sensitivity: Receive sensitivity is a measure of the minimum signal strength that a receiver can demodulate. In other words, it is the lowest power level at which a receiver can detect a radio signal, maintain a connection, and still demodulate the data. BLE technology dictates that a device must be able to achieve a minimum receiver sensitivity of -70dBm to -82dBm, depending on the PHY used. However, BLE is usually able to achieve higher receiver sensitivity levels. For example,HOPERF BLE products can achieve a maximum reception sensitivity of -98.9dBm or -106.7dBm when using 1M PHY or 125K PHY. Antenna Gain: The antenna converts electrical energy from the transmitter into radio waves and vice versa. Antenna location, package size, and design all greatly affect signal transmission and reception efficiency. Effective antenna gain affects both transmitting and receiving antennas. At the same time, the directivity of the antenna will also have an impact on transmission or reception. Path Loss: Path loss is the reduction in signal strength of radio waves as they propagate through a medium. Path loss, or path attenuation, occurs naturally over distance and is affected by the signal transmission environment. Obstacles between the transmitter and receiver can degrade the signal, and the amount of attenuation and effective path loss varies with the type and density of the obstruction. ​
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  • Q
    What BLE products & solutions does HOPERF have?
    A
    Shenzhen Hope Microelectronics Co., Ltd. is an IoT system-level service brand manufacturer integrating high-performance radio frequency chip design, firmware and protocol and application testing and development. As a senior original manufacturer of domestic BLE wireless chips, it has successively launched a number of independently developed and designed BLE chips such as CMT4502, CMT4522, CMT4552, and CMT4531. On this basis, it has launched HM-BT4502, HM-BT4502B, HM-BT4522, HM -BT4531, HM-BT4531B, HM-BT2204, HM-BT2101, HM-BT2102, HM-BT2701 and other BLE modules. Combining a rich BLE product line and strong application research and development capabilities, HOPERF has launched a series of BLE solutions, including smart BLE key solutions, BLE smart water meter solutions, BLE smart home appliance solutions, BLE data transparent transmission solutions, etc., to help users can complete BLE product designs and bring them to market faster.
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  • Q
    How to upgrade your device to a Matter device?
    A
    HOPERF provides a one-stop mature Matter solution that can help customers quickly upgrade their original equipment to smart devices that support Matter standards. Welcome to consult at: sales@hoperf.com.
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  • Q
    Who issues the DAC certificate for Matter devices?
    A
    All Matter devices have device attestation certificates to prove that the device is certified genuine. Device certification certificates are issued by designated root certification authorities (CAs). These certificate authorities are not operated by the CSA Connectivity Standards Alliance but are members of the alliance and must meet strict security standards.
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  • Q
    Does Matter certification require certification of the underlying communication protocol?
    A
    Yes. Matter is an application layer standard protocol running on technology platforms such as Wi-Fi, Ethernet, Thread and BLE. Prior to Matter certification, devices are required to be certified according to the requirements of the corresponding technical organizations to be allowed to use these technologies.
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  • Q
    What types of devices does Matter support?
    A
    Devices supported by Matter 1.0 include: network bridge equipment, control equipment, door locks, HVAC controls, lighting appliances, media playback equipment, safety and security sensors, and curtains and curtains. Alliance members will lead the development of new device types, and a new use case team task force has begun defining new device types, such as cameras, home appliances, sweeping robots, vehicle charging units and energy management devices.
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  • Q
    What is Matter?
    A
    Matter is a new smart home open standard based on mature technology. It uses low-power BLE for device distribution and Wi-Fi, Thread and Ethernet for device connection. Major smart home platforms and device brands are already upgrading countless existing gateways, smart speakers and other devices on sale and in your home, so the new generation of Matter devices will be seamlessly connected to your smart home.
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