Entering AT Command Mode SX1262-LoRa-DTU

Projects General Guidance
1

We are using SX1262-LoRa-DTU for the 1st time to give wireless commands to PLCs in a wireless mesh network. Need help in entering AT command mode.

Approach1: using Tera terminal software - setting serial port parameters (tried with 115200 and 9600 baud rates as the manual is confusing mentioning 2 baud rates for RS232 interface). In the black screen, terminal settings are done CR+LF and local echo checked. Still we are unable to enter AT Command mode - when we type AT no response, for +++ no response. I doubt whether this tera terminal is acutally connected to the LoRa device - i think establishing connection maybe a issue - dont know. Com3 port settings are matching Tera port settings.

Approach2: Using SScom software provided by waveshare - tried with both baud rates 115200 and 9600 - when we enter AT command settings - some data appears on the left side window date and time each time we press any option. But how to enter AT command and set the device configuration. Have followed the manual but no use till now. Need help.
Image is attached on SSCOM software result.

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2

I am also having problem with this. I just want to ask you, did you solve your problem? If yes, can you please help me with this?

3

is your problem identical to that outlined in post 1?
e.g. same SX1262-LoRa-DTU modules, unable to enter AT commands, etc?

4

yes the problem is still there and unable to use LoRa for the desired application. Can somebody help?

5

Yes can you help resolve this issue?

6

what device are you using to communicate with the SX1262-LoRa-DTU?
how is it connected?

7

Connection - SX1262-LoRa-DTU - DB9 Serial Port is connected with DB9-Fem to Fem cable provided by Waveshare - and the other side we are using Bafo DB9-male to USB which is connected to Laptop. Tera Terminal and SSCOM software is installed in the laptop and trying to enter AT command mode to get the slave id and other settings done. But unable to enter AT command mode.

8

if you cannot get anything from the SSCOM software I suggest you get on to Waveshare help

9

can i configure LoRa from Tera Terminal software? or do you think its a device configuration issue.

10

The problem you are having is really nothing to do with LoRa or Arduino as such.

Most LoRa modules cannot be configured with a serial terminal, they use an SPI interface.

If Waveshare supply an application to configure their devices you would expect it to work.

11

Waveshare has SSCOM software thru' which we are trying to enter AT command mode as explained in their user manual. Do you mean SPI interface is another hardware which has to be used to configure LoRa-SX1262. The responses received from waveshare support are not simple to understand or with conviction. Initially they told us that new firmware has to be developed, then were told firmware is correct but it was modbus/slave problem which was not clear at all. already spent months with waveshare support and our LoRa devices are installed at our pilot site for pump operation.

12

No.

LoRa modules themselves do have an SPI interface.

You have a module that has put a microcontroller that accepts AT style serial commands and converts them into SPI commands for the on-board LoRa module.

13

see the response received from waveshare support. Can you guide me accordingly.

There is no problem with the test here, please follow my test steps.

1)Consider that it may be a modbus poll/slave problem. Use sscom aging test for a period of time and there will be no problem;

Please replace sscom comparison test

  1. Sometimes the machine will enter an abnormal state due to long-term and high-frequency data sending and receiving. At this time, you need to restart the module to repair it.
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14

Cannot help, never had or seen one of those modules.

If you have installed these devices at a pilot site, and you cannot get them working, maybe its time to look to use a device that is supported ?

15

Adafruit sells well designed and manufactured Feather LoRa modules that actually work, and provides professional support for their software and hardware products.

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16

agreed - I have a number of adafruit modules (including the 32u4 LoRa) which work without problems and are well supported by adafruit libraries
also worth looking at are Heltec ESP32 LoRa modules

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17

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