LoRa Wireless Instrument refers to a device or tool that utilizes LoRa technology for wireless communication. LoRa is a long-range, low-power wireless communication technology that is commonly used in IoT applications. It operates in license-free sub-gigahertz radio frequency bands and can achieve data rates ranging from 0.3 kbit/s to 27 kbit/s. A LoRa Wireless Instrument could be a sensor, gateway, or any other device that utilizes LoRa technology for wireless connectivity and data transfer.
Lora Wireless Instruments User Parameter Settings #
1.Communication interval #
Definition: It refers to the interval time between data upload by the instrument, with a minimum of 1 minute and a maximum of 24 hours for the Lora instrument.
Modification: a It can be modified through maintenance software;
b. After connecting to the gateway, the gateway parameters are forcibly modified.
2. Screen brushing time #
Definition: It refers to the data change interval displayed on the LCD after the instrument enters sleep mode
Modification: a Only through maintenance software;
3. Maximum sleep time #
Definition: It refers to the time when the instrument enters a deep sleep state when it uploads data according to the established mechanism and does not receive a response from the gateway.
Modification: a Only through maintenance software;
4. Waiting for response time #
Definition: It refers to the time spent waiting for the gateway to respond after the instrument uploads data (normal communication connection, the instrument receives the gateway’s response within 2 seconds).
Modification: a Only through maintenance software;
5. Communication mechanism #
Definition: It refers to the instrument program running according to the set principles. The default instrument is to upload data 10 times, and the instrument will judge the gateway’s response based on the waiting time for a response.
Modification: Upper computer program modification customization
For example:
The default factory setting is for the instrument to wait for a response time of 5 seconds, with a communication interval of 60 seconds, a screen brushing time of 60 seconds, and a maximum sleep time of 3600 seconds. If the communication interval of the gateway is set to 120 seconds, data will be uploaded after 60 seconds when the instrument is powered on. If the instrument does not receive a response from the gateway within 5 seconds, it will enter a sleep mode of 60 seconds; After hibernation, the instrument panel will upload the second data. If the gateway still does not receive a response within 5 seconds, it will continue to enter 60 seconds of hibernation. Until the instrument is uploaded 10 times without receiving a response from the gateway, it will enter the maximum response time of 3600S, and the instrument will be in deep sleep. If the gateway responds to the instrument when uploading data, it indicates successful connection, and the gateway will forcibly modify the selection interval of the instrument.
Lora Wireless Instruments Communication Parameter Settings #
1. Network channel #
Definition: Refers to the communication frequency band of the communication module, with a general range of 433MHz ranging from 410 to 4410 MHz. Typical operating frequency bands are 410M to 441MHz, 470M to 510MHz, 850 to 950MHz, etc. The channel number range set is 0 to 31.
Modification:
a. Can be maintained through software;
b. Set the header button.
2. Network identification #
Definition: The network number is used to distinguish different LoRa networks. Only devices on the same channel and using the same network number will communicate with each other. The range that can be set is 0~65535
Modification:
a. Can be maintained through software;
b. Set the header button.
3. Aerial velocity #
Definition: Communication theoretical bandwidth, adjustable at 6 levels (0.3, 0.6, 1.0, 1.8, 3.1, 5.5Kbps), corresponding to LV1~LV6.
The speed selection of data in the air can be divided into 6 levels. The higher the level, the higher the rate. Under the same conditions, the higher the rate, the closer the transmission distance. Therefore, this value needs to be adjusted according to the actual application environment.
Modification:
a Can be maintained through software;
b. Set the header button.
When connecting the instrument and gateway, the network identification, network channel, and air rate parameters must be set consistently.
Lora Instrument Transmission Requirements #
1. Number of connections for one RTU #
In theory, one RTU can be connected to 64 instruments, but considering factors such as the transmission distance of communication data, it is recommended that the number of connections for one RTU be less than 30; If there are too many connected instruments, it will affect the data upload interval. Lora belongs to low-speed response. If there are too many connected instruments and the upload interval setting time is too short, there will be a phenomenon of connecting instruments falling off.
2. The relationship between transmission distance, power consumption, and air speed #
The distance of data transmission is directly related to power consumption and the transmission frequency of the instrument. The higher the air rate level of the instrument, the shorter the time for transmitting data under the same conditions, and there will be limitations on the transmission distance, resulting in higher power consumption of the instrument; If you want to ensure a longer transmission distance, you need to set the air rate level to be lower.
Lora instrument zero drift button clear #
- Press both W1 and W2 buttons simultaneously to enter the password input interface. Press W2 to change the value, W1 to change the position, enter the password “00005”, and press Zero to confirm.
- On screen prompt Set 0, press W2 to enter the serial number input interface, then press W2 until the displayed number is “00001”, press Zero key to confirm, and the screen prompt YES. Press Zero key again to confirm, and the reset is completed.
Lora transmitter uses buttons to set instrument parameters #
1) Press the W2 key to enter the password input interface. Press the W2 key to change the value, press the W1 key to change the position, enter the password “00066”, and press the Zero key to confirm.
2) The main variable area displays “SET 1”, the channel number flashes, press the W2 key to change the value, press the W1 key to confirm, and enter the next parameter setting.
3) When “SET 4” is displayed, press the W2 key to enter editing, W2 key to change the value, W1 key to change the position, and Zero key to confirm.
4) After the final step is set, the main variable area displays “YES”, and press the Zero key to save the parameters. Setting completed.
5) Parameter List Description
Identification Description
SET 1 set group number (hexadecimal)
SET 2 setting number (decimal)
SET 3 Set wireless channel (decimal)
SET 4 Set wireless ID (decimal)
SET 5 encryption enable: 0- no encryption; 1- Encryption
SET 6 encryption key (decimal)
SET 7 LoRa air speed (0-6)
YES Save parameters
How to connect the lora sensor and the gateway (RTU)? #
Please check the follow video for operate:
