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Lora-net / packet_forwarder

A LoRa packet forwarder is a program running on the host of a LoRa gateway that forwards RF packets receive by the concentrator to a server through a IP/UDP link, and emits RF packets that are sent by the server. This project is associated to the lora_gateway repository for SX1301 chip. For SX1302/1303, the repository sx1302_hal must be used.
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Server Messages #7

Closed MKollev closed 8 years ago

MKollev commented 8 years ago

Hi,

I have setup Lora-net/packet_forwarder and server; Is there any standart way to parse the data from messages? Or can I send only valid json messages with the packet_forwarder?

On the server I receive messages like this ones:

+@�UZ{"rxpk":[{"tmst":2934474419,"chan":2,"rfch":1,"freq":868.500000,"stat":1,"modu":"LORA","datr":"SF7BW125","codr":"4/5","lsnr":6.8,"rssi":-67,"size":18,"data":"QBEREREAlAMEX5iCQB8ij0ZU"}]}
���UZ{"rxpk":[{"tmst":2921073603,"chan":0,"rfch":1,"freq":868.100000,"stat":1,"modu":"LORA","datr":"SF7BW125","codr":"4/5","lsnr":7.8,"rssi":-71,"size":18,"data":"QBEREREAkwMEoIEzjVYBnMfH"}]}
e��UZ{"rxpk":[{"tmst":2908126707,"chan":2,"rfch":1,"freq":868.500000,"stat":1,"modu":"LORA","datr":"SF7BW125","codr":"4/5","lsnr":6.2,"rssi":-66,"size":18,"data":"QBEREREAkgME/9mgCeWD3REa"}]}
O�UZ{"rxpk":[{"tmst":2894923683,"chan":0,"rfch":1,"freq":868.100000,"stat":1,"modu":"LORA","datr":"SF7BW125","codr":"4/5","lsnr":8.2,"rssi":-65,"size":18,"data":"QBEREREAkQMEi7mXjZsNpziU"}]}

Thanks in advance, any help will be appreciated.

mcoracin commented 8 years ago

Hello,

I'm not sure I fully get your question.

The message format sent by the gateway are formatted as described in the PROTOCOL.txt file you can found in the lora-net/packet_forwarder root directory.

Typically there are few octets (4 to 12) describing the protocol version, the message type etc... Then, after those few octets, you have the JSON string which contains the actual packet data.

SO the server has to parse the few bytes as a binary header, and then any JSON parser car handle the JSON string.

Regards

MKollev commented 8 years ago

Hello, Thank you for the quick response. This answers my question.

MKollev commented 8 years ago

Hello, One more thing. I receive the uplink messages, but it seems I do NOT receive the PULL DOWN ack message on the server side. When I uncomment the the line in the source of the beacon "//MSG("WARNING: [down] recv returned %s\n", strerror(errno)); /* too verbose */" it is shown continuously although I am sending messages down the UDP to the Gateway on a 5 sec basis.

When I start the util_sync I see that the packets are received but still the beacon program is not aware of them.

Any suggestions?

Regards.

On Mon, Apr 25, 2016 at 2:21 PM, Michael Coracin notifications@github.com wrote:

Hello,

I'm not sure I fully get your question.

The message format sent by the gateway are formatted as described in the PROTOCOL.txt file you can found in the lora-net/packet_forwarder root directory.

Typically there are few octets (4 to 12) describing the protocol version, the message type etc... Then, after those few octets, you have the JSON string which contains the actual packet data.

SO the server has to parse the few bytes as a binary header, and then any JSON parser car handle the JSON string.

Regards

— You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub https://github.com/Lora-net/packet_forwarder/issues/7#issuecomment-214271344