How many LoRa terminals can the F8916 L connect to at the same time, what are the requirements for L

LoRa security is stipulated by LoRaWAN protocol, the payload between the base station and the terminal adopts AES128 encryption, the ciphertext can be dynamically generated on the background server, and the base station and the background server are Base64 on the basis of AES128, so how about the security, you need to consider the security of the encryption algorithm yourself, AES is a relatively high-security encryption, of course, the protocol also supports custom encryption algorithms.

Officially, the concept of 5,000 per square kilometer has been mentioned.

First, you'll need the LoRa Terminal Configurator and install it. Then, use the tool to set parameters, adjust transceiver hardware parameters, set transmission functions, and more. When you're done, click the Apply button to save the changed parameters.

Because he's the big deal.

1.Configure the connection.

Before configuring the LoRa data transmission terminal, you need to connect the LoRa data transmission terminal to the PC used for configuration through the RS232 serial cable or RS232-485 conversion cable configured at the factory, as shown in the following figure

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This section describes how to configure parameters.

There are two ways to configure the parameters of the F8L10T:

Via dedicated configuration software: All configurations are configured via the corresponding entries in the software interface, which is only suitable for the user's convenience of configuring with a PC.

Configuration by extending the AT command (hereinafter referred to as the AT command): In this configuration mode, the user only needs to have a serial communication program to configure all the parameters of F8L10T, such as super terminal under Windows, minicom, putty under Linux, etc., or directly configure the node by the user's single-chip microcomputer system. Before you can run the extended at command to configure the F8L10T, you need to put the F8L10T into the configuration state.

The following describes the configuration items of F8L10T in detail based on the application extension at command configuration mode, and also gives the configuration items corresponding to the configuration software.

Configure the F8L10T parameters through the configuration software, as shown in the following figure.

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Debugging level. The log of the debugging level control module shows that it can be divided into three debugging levels, where:

0 does not output any log information.

1 Output key log information.

2 Output detailed log information.

Default value: 1<>

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ID: Set the ID of the module, configurable range 0 65535, sleep mode.

When the device is in low-power mode, it can be set to none, time, and deep. When you sleep on a scheduled basis, you need to configure the Wake Time and Sleep Time. During deep sleep, it can only be woken up by the IO1 foot.

Default value: none

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Work Agreements. The serial data protocol of the module can be divided into "pro" and "trns".

Thereinto. "Pro": Serial port data must be sent and received in a certain data format, and the protocol format is referred to the LoRa API Manual. The maximum length of API Payload data is 100 bytes.

Default value: trns

Air rate. The higher the level, the higher the rate, the higher the rate, the higher the transmission distance. Therefore, this value needs to be adjusted according to the actual application environment.

Note: Once the rate is determined, then all devices must be at the same rate, otherwise they cannot communicate.

Transmit power. Without PA, up to 20dBm. There are 4 grades, the higher the grade, the more power.

Default value: Level 4.

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Serial port configuration. It can configure the baud rate, data bits, check bits, and stop bits of the communication serial port.

Default, baud rate 115200, attribute 8n1.

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The airspeed of LoRa is calculated by the comprehensive calculation of bandwidth, spread spectrum factor, and cyclic coding rate, and it is not recommended to set the bandwidth to a very small one, such as less than, due to the influence of the crystal frequency accuracy.

The airspeed of FSK can be set directly, and the following empirical formula is usually required, and the modulation frequency offset should not be set too small due to the influence of the frequency accuracy of the crystal oscillator. Receive bandwidth Twice the modulation offset + air rate.

will conflict, so the SX1301 is generally used for multiplexing. The terminal needs to do channel monitoring to do the frequency hopping anti-collision packet mechanism.

Is it sending the same message to multiple people at the same time?

If you're using a computer, there's a group selection item on the group page, right-click on it and you'll see the option to create a discussion group, select it, and then add the person you want to chat with.

Yes, you can first set up a LAN through LoRa, and then realize it through the GPRS network, and the specific manufacturers have Xiamen **LoRa terminal node model F8L10T and gateway F8916-L can realize long-distance wireless transmission without building a base station.

Base station routing gateways all mean the same thing. I see what the young man below means is also through the point-to-point transfer GPRS scheme. We use the GW1 transparent 1301 gateway produced by Nanjing Rejeee.

**LoRa Gateway F8916-L provides standard RS232 (or RS485 RS422), Ethernet and WiFi interfaces, which can directly connect serial devices, Ethernet devices and WiFi devices.

In the case of pure LoRa networking, there are generally differences according to the different R&D capabilities of manufacturers, and the **LoRa module F8L10D networking can reach about 300.

The use of base stations is similar to the point-to-point transmission method. In the case of SF7, BW=125K, LoRa takes 57ms for 20-byte transmission time, and can theoretically receive 17 channels of data in one second. If the frequency of packet issuance is set to once every 1 minute.

Then the theoretical value is 17 60We use the M-HL9 module produced by Nanjing Renjue Company, which is cheap, low power consumption, and supports secondary development. You can add them to sell yuyang4434

Broadly speaking, a gateway is a device that connects 2 different networks. If a device can connect the LoRa wireless network to the Internet, it is a LoRa gateway.

Currently, the most popular design in the industry is based on Arm+Linux & SX1301, which can support up to 10,000 nodes.

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