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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
    华普微有哪些蓝牙产品及解决方案?
    A
    深圳市华普微电子股份有限公司,是一家集高性能射频芯片设计、固件与协议及应用测试开发于一体的物联网系统级服务品牌厂商。作为国内BLE无线芯片资深原厂,其先后推出有CMT4502,CMT4522,CMT4552,CMT4531等多款自主研发设计的蓝牙芯片,并在此基础上推出有HM-BT4502,HM-BT4502B,HM-BT4522,HM-BT4531,HM-BT4531B,HM-BT2204,HM-BT2101,HM-BT2102,HM-BT2701等多款蓝牙模组。 结合丰富的蓝牙产品线及强大的应用研发能力,华普微推出有一系列蓝牙解决方案,包括智能蓝牙钥匙解决方案、蓝牙智能水表解决方案、蓝牙智能家电解决方案、蓝牙数据透传解决方案等,以帮助用户更快的完成蓝牙产品设计并推向市场。
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  • Q
    如何将您的设备升级为Matter设备?
    A
    华普微提供一站式成熟的Matter解决方案,可以帮助客户将原有设备快速升级为支持Matter标准的智能设备。欢迎咨询华普微销售团队sales@hoperf.com。
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  • Q
    Matter设备的DAC证书由谁签发?
    A
    所有Matter设备都有设备认证证书(device attestation certificates),以证明设备是经过认证的正品。设备认证证书由指定的根证书颁发机构(CAs)发放。这些证书颁发机构的运营方不是CSA连接标准联盟,而是联盟成员,且必须符合严格的安全标准。
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  • Q
    Matter认证是否要求对底层通信协议也进行认证?
    A
    是的。Matter是在Wi-Fi、以太网、Thread和蓝牙等技术平台上运行的一种应用层标准协议。Matter认证之前要求设备按照相应技术组织要求进行认证以获准使用这些技术。
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  • Q
    Matter支持哪些类型的设备?
    A
    Matter 1.0支持的设备包括:网桥设备、控制设备、门锁、暖通控制、照明电气、媒体播放设备、安全安防传感器、以及窗帘幕帘。联盟成员将主导新设备类型的开发,新的用例团队任务小组已经开始定义新设备类型,如摄像头、家用电器、扫地机器人、车辆充电装置和能源管理设备。
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  • Q
    Matter是什么?
    A
    Matter是基于成熟技术的新智能家居开放标准,其使用低功耗蓝牙进行设备配网,使用Wi-Fi、Thread和以太网进行设备连接。各大智能家居平台和设备品牌已经在升级在售和家中的无数现有网关、智能音箱等设备,所以新一代Matter设备会与您的智能家居无缝连接。
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