[Jason Reiss]

Thanks for the post. Looks like a great project and starting point for custom application development.

[Jason Reiss]

Manual mode allows a placeholder.
Anything between the angled brackets will be replaced by the HW EUI.
“gateway_ID”: “<LORA-EUI>”,

The next release will have an option to fill the EUI from the hardware for the LoRa Packet Forwarder config.

• This reply was modified 6 years, 4 months ago by Jason Reiss.

[Jason Reiss]

The AppKey is required to match the device.

[Jason Reiss]

Add the device eui and key into Key Management page.

Device Config and Session is for ABP provisioning.

[Jason Reiss]

A network server can send a packet to the end-device to enter a test mode of operation. Test Mode can enable/disable ACK and echo payloads back to the test server. ADR can be used to change the datarate of the end-device.

TestMode is implemented in the LoRaWAN stack, the reference Semtech stack shows the client side functionality starting at line 705.
https://github.com/Lora-net/LoRaMac-node/blob/7c3953ea531bdd0ae194f91463eec38d4d4f93b1/src/apps/LoRaMac/classA/B-L072Z-LRWAN1/main.c

Full test documentation is available for LoRa Alliance members at https://lora-alliance.org/

[Jason Reiss]

Did you find that one of your proposed solutions works?

[Jason Reiss]

Expected type for port is an int.

[Jason Reiss]

Lorawan uses 4/5 coderate only.
Using next datarate will allow more range than increased coderate.

Using an open stack source would allow changing. The sxradio driver will allow all options.
https://github.com/ARMmbed/mbed-os-example-lorawan

[Jason Reiss]

Could be scheduling conflict or duty-cycle limits. What channel plan is used?

[Jason Reiss]

Please create support ticket and provide sw and hw version info. Also provide full logs of state transition from working to non-working if possible.

support.multitech.com

[Jason Reiss]

The default port for a downlink should be 1 if “port” is not provided in the JSON.

What is the JSON provided to the network server when queuing a downlink?

[Jason Reiss]

The node should be saving the last uplink counter, it is not expected to reset to 0. This is a replay attack vulnerability.

Disable strict frame counter

[Jason Reiss]

DHCP server is not enabled by default. Assign the PC an address such as 192.168.2.100 and set the gateway to 192.168.2.1.

[Jason Reiss]

What version of network server is being used?

SNR > 0 will allow SF7
What ADR commands are being sent to the end-device?

$ mosquitto_sub -v -t lora/+/+

Normally ADR will not reduce the datarate using commands.
Why doe the datarate degrade from SF7 so quickly at the end of this sequence?

[Jason Reiss]

The 210A does not have GPS.
We do not offer a GPS accessory card.

GPS is available as a build option for the Conduit and Conduit IP units.
246A or 247A would be the product you will need.

[Jason Reiss]

ABP session info can be duplicated to accept uplinks at both gws.

OTA only allows one gw to be joined, no shared session.

Counter could get out of sync if one is out of range, this would be more of a problem for the downlink counter as uplink counter is updated on packet rx at gw.

[Jason Reiss]

POST /api/lora/restart

Developer tools in browser will show api end points in requests used by the UI.

[Jason Reiss]

MTSSerial is used on mDot/xDot as well as our cellular modules. It is a wrapper of RawSerial that adds buffers.

MTSSerial does not support RS485. I am not certain it will meet your requirements.

There are projects such as modserial and RS485 available on mbed that may be of interest.
https://os.mbed.com/users/Allar/code/RS485/docs/tip/classRS485.html
https://os.mbed.com/cookbook/MODSERIAL

[Jason Reiss]

I do not know if it is.

[Jason Reiss]

https://github.com/kersing/multitech-installer/

[Jason Reiss]

This packet forwarder has support for multiple server addresses.
https://github.com/kersing/packet_forwarder/tree/master/mp_pkt_fwd

Otherwise it should be possible with node-red to send the UDP packets to each server and relay the responses back to the packet forwarder.

Two servers will have downlink collisions trying to schedule packets to be sent out the radio.

[Jason Reiss]

The DeviceTime MAC command is specified in LoRaWAN 1.0.3, the network must be notified out-of-band that it supports this command.

The DeviceTime is used for Class B device to find the first beacon.

We will add a command that makes the DeviceTimeReq to a network server and provide the DeviceTimeAns payload in the response of the AT Command.

We may not modify the RTC on the module as it is not needed for the AT firmware.

[Jason Reiss]

Overriding the MeasureBattery function will allow the application to provide a battery level to the DeviceStatusAns MAC command.

[Jason Reiss]

LW 1.1 is expected to be ready Q2 next year.

We will add an AT command to query the device RTC clock time.
The AT firmware will update the RTC when a device time MAC command is received.

The command will output current UTC seconds.
This command will be available in our next release with LW 1.0.3 with Class B expected next month.

Accuracy according to LoRaWAN DeviceTimeReq/Ans definition:
* The time provided by the network MUST have a worst case accuracy of +/- 100 mSec.

[Jason Reiss]

lora-network-server v2.0.19 in mLinux v3.3.24

up messages will be published to the following topics
lora/<DEV-EUI>/up
lora/<APP-EUI>/<DEV-EUI>/up
lora/<APP-EUI>/<DEV-EUI>/<PORT>/up

The same message should appear on all topics.

MQTT Messages

lora-network-server v1.0.36 in mLinux v3.3.9

Only lora/<DEV-EUI>/up is produced.

[Jason Reiss]

https://os.mbed.com/teams/MultiTech/code/MTS-Serial

Below is the ISR handler we use in our custom serial driver on the AT command port.

void MTSSerial::handleWrite()
{
    while(txBuffer.size() != 0) {
        if (_serial->writeable()) {
            char byte;
            if(txBuffer.read(byte) == 1) {
                _serial->attach(NULL, Serial::RxIrq);
                _serial->putc(byte);
                _serial->attach(this, &MTSSerial::handleRead, Serial::RxIrq);
            }
        } else {
            return;
        }
    }
}

[Jason Reiss]

Encode the newlines as \n in the config field.
JSON does not support multiline strings.

What does the request look like when 4-5 random lines are removed?

[Jason Reiss]

Please create a case at support.multitech.com to exchange device info and get instructions.

[Jason Reiss]

The configuration of the lora-in node changes the output between a buffer or string. You must choose bytes to get a buffer from the node.

The lora-out node will accept payload input as a buffer or a string and convert them to base64 to be passed to the network server. The type of “payload” field determines how the node will process the data.

[Jason Reiss]

The payload is received by the lora-in node as a base64 string and transformed into a buffer within node-red.

The lorawan payload will be presented in full as a buffer.

lora-out node will do the reverse operation of converting a buffer to a base64 string.

[Author]

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