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Anonymous
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Anonymous
Asked: May 27, 2022In:
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Why can’t my LoRa device or module output power reach 20dBm ?

Why can’t my LoRa device or module output power reach 20dBm ?

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loramodule output poweroutput powerpower issue
  1. nakhtar

    Hi, The +20dBm specification is for chip pin output power. In any RF system, bandpass filters and RF switches have insertion loss The typical performance of the antenna can reach +19dBm after matched filtering.

    Hi,

    The +20dBm specification is for chip pin output power. In any RF system, bandpass filters and RF switches have insertion loss

    The typical performance of the antenna can reach +19dBm after matched filtering.

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Anonymous
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Anonymous
Asked: May 27, 2022In:
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How to calculate the actual bit rate and transmission time of the LoRa system?

How to calculate the actual bit rate and transmission time of the LoRa system?

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bit rateloralora systemnetworktransmission time
  1. nakhtar

    Hi, The steps (iV) are listed below: Calculations are easy by using the LoRa calculator, which can be downloaded from the Semtech website (link below). http://www.semtech.com/apps/filedown/down.php?file=SX1272LoRaCalculatorSetup1%271.zip  

    Hi,

    The steps (iV) are listed below:

    Calculations are easy by using the LoRa calculator, which can be downloaded from the Semtech website (link below).

    http://www.semtech.com/apps/filedown/down.php?file=SX1272LoRaCalculatorSetup1%271.zip

     

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Anonymous
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Anonymous
Asked: May 27, 2022In:
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Is LoRa a mesh network, peer-to-peer transmission, or a network?

Is LoRa a mesh network, peer-to-peer transmission, or a network?

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connectivityloramesh networknetwork connectivitypeer-to-peer transmission
  1. nakhtar

    Hi, LoRa itself is a PHY that can be used in all network topologies. Mesh networking expands the range of the network, but reduces network capacity, At the expense of synchronization overhead and battery life reduction, due to synchronization and hop count. It is necessary to extend the distance witRead more

    Hi,

    LoRa itself is a PHY that can be used in all network topologies. Mesh networking expands the range of the network, but reduces network capacity, At the expense of synchronization overhead and battery life reduction, due to synchronization and hop count. It is necessary to extend the distance with a mesh network architecture, so LoRaWAN chooses a star architecture to optimize network capacity, battery life, and easy installation.

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Anonymous
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Anonymous
Asked: May 27, 2022In:
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When two LoRa modules cannot communicate with each other, what are the steps for failure detection?

When two LoRa modules cannot communicate with each other, what are the steps for failure detection?

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communicationconnectivity issueloramodulerenesas
  1. nakhtar

    Hi, First check whether the SPI communication is successful, the successful sign is that the version value of the read chip is 0x12, the DIO0 pin is responsible for notifying the MCU that the reception is completed and check whether the DIO0 pin configuration is normal. The configuration parametersRead more

    Hi,

    First check whether the SPI communication is successful, the successful sign is that the version value of the read chip is 0x12, the DIO0 pin is responsible for notifying the MCU that the reception is completed and check whether the DIO0 pin configuration is normal. The configuration parameters of LoRa should be consistent, including frequency, spreading factor, bandwidth, coding rate, preamble length, frequency hopping enable, syncword, and low-rate optimization; if one of the above parameters is different, communication cannot be performed.

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Anonymous
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Anonymous
Asked: May 27, 2022In:
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What is the LoRa data rate?

What is the LoRa data rate?

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data ratelora
  1. nakhtar

    Hi, LoRa defines a specific set of data rates, but there are multiple options for the end chip or PHY. SX1272 supports data rates from 0.3 to 37.5kbps, SX1276 supports 0.018 to 37.5kbps.

    Hi,

    LoRa defines a specific set of data rates, but there are multiple options for the end chip or PHY. SX1272 supports data rates from 0.3 to 37.5kbps, SX1276 supports 0.018 to 37.5kbps.

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