Someone can write a step by step guide for connecting LoPy to TTN ( in my case I don't have any gateway but I want to use LoPy as a micro-gateway) Thanks.

[Officina]

Re: OTAA connection to TTN

[sakis]

@Officina

Hi. At the moment there's no official tutorial about connecting to TTN, other than the forum topic you have already found. Have you tried connecting using the information provided at that topic?

We will add that to our documentation feature list.

[gertjanvanhethof]

This is a returning discussion.
LoPy is a nano-gateway and this means just one channel is used instead of a minimum of 3 (which is needed for LoRaWAN compliancy).
So the LoPy can only act as a one channel gateway and only can serve one channel LoRaWAN devices (like another LoPy).
For connection the nano-gateway to TTN you should implement http://www.grpc.io/ which is not there yet.
There is a python version: http://www.grpc.io/docs/tutorials/basic/python.html
But this one is NOT micropython.
So someone should fist backport this to micropython and then we can interact with TTN as gateway.

Till than you can connect the LoPy to TTN as a node. See: https://www.thethingsnetwork.org/docs/devices/lopy/
This is working fine. You are able to receive messages from your LoPy but only when you in range at a full LoRaWAN gateway.

[jmarcelino]

Things are in motion ;-)

[daniel]

@jmarcelino Nice!! Well done, can you share more? :-)

Cheers,
Daniel

[jmarcelino]

@daniel
So far it's simple really, I started experimenting with UDP sockets yesterday, then expanded to implement a simplified (just Rx and Stat) version of the Semtech LoRa gateway protocol which TTN supports: https://github.com/Lora-net/packet_forwarder/blob/v2.2.0/PROTOCOL.TXT

Today I added LoRa from the nano-gateway example, so it's not real LoRaWAN yet at the moment. Next I'll try to capture actual single-channel LoRaWAN traffic and if possible forward to TTN.

Ultimate goal would be to match the ESP8266 Lua single-channel gateway code - https://github.com/JaapBraam/LoRaWanGateway - which is amazing and likely the closest thing possible to a real SX1301-based gateway, but that would very likely require your help - or to go down to the ESP-IDF level.

[daniel]

@jmarcelino thanks for the detailed info!

Ultimate goal would be to match the ESP8266 Lua single-channel gateway code - https://github.com/JaapBraam/LoRaWanGateway - which is amazing and likely the closest thing possible to a real SX1301-based gateway, but that would very likely require your help - or to go down to the ESP-IDF level.

We would be more than glad to help you with that. You should not have to go down to ESP-IDF level, but if there's any functionality that you need not already exposed via the MicroPython API just let us know and we'll add it :-)

Cheers,
Daniel

[jmarcelino]

@daniel
Great, thanks for offering to help.

I was going to look at BLE but hearing from Espressif staff on esp32.com it seems Bluetooth is about to go through major changes in the imminent esp-idf 2.0 so might take up a nice LoRa challenge instead :-)

[daniel]

@jmarcelino for this:

Add support for receiving multiple SF's on a channel

We will need to implement a few things in C.

[Batilan]

@daniel said in Someone can write a step by step guide for connecting LoPy to TTN ( in my case I don't have any gateway but I want to use LoPy as a micro-gateway) Thanks.:

Ultimate goal would be to match the ESP8266 Lua single-channel gateway code - https://github.com/JaapBraam/LoRaWanGateway - which is amazing and likely the closest thing possible to a real SX1301-based gateway, but that would very likely require your help - or to go down to the ESP-IDF level.

We would be more than glad to help you with that. You should not have to go down to ESP-IDF level, but if there's any functionality that you need not already exposed via the MicroPython API just let us know and we'll add it :-)

That would be great :-) I think we need to have the CAD detection functionality as it is in the detector() and dio0handler() functions in https://github.com/JaapBraam/LoRaWanGateway/blob/master/src/SX1276.lua somehow exposed

[gertjanvanhethof]

@jmarcelino Can you explain how data is sent to TTN. Based on the TTN Gateway documentation you should use gRPC. Is there an alternative? Where can I find documentation about this?

[Batilan]

@gertjanvanhethof : Note that TTN will allow gateways using the current Semtech demo protocol (UDP) to connect as well, see https://www.thethingsnetwork.org/forum/t/packet-forwarder-future/4021/3