Lup Yuen Lee 李立源

Now we port the Driver ... From Apache OS to

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

Our Driver has many Layers (like Shrek) ... Let's peel the Shrek ... (erm) Layers 🧅

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

The Application Layer (left) of our Driver exposes LoRaWAN Functions to Application Firmware ... Join Network, Open/Close Port, Transmit/Receive Packets

github.com/lupyuen/bl_iot_sdk/

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Lup Yuen Lee 李立源

OS has a Command-Line App that calls the Application Layer of the LoRaWAN Driver ... We shall port this app to too
mynewt.apache.org/latest/tutor

1
Lup Yuen Lee 李立源

For Fans: RAKwireless has a Tutorial ... We shall try this later

github.com/RAKWireless/WisBloc

1
Lup Yuen Lee 李立源

The Node Layer (centre) in our Driver handles the networking operations for our BL602 LoRaWAN Node ... It's called by the Application Layer (left)

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

What's MCPS in the Driver? ... That's the "MAC Common Part Sublayer", which is defined in the Semtech LoRaWAN Stack

stackforce.github.io/LoRaMac-d

1
Lup Yuen Lee 李立源

Semtech Stack is structured according to IEEE 802.15.4 ... Yep LoRaWAN shares the same legacy as Thread, Zigbee and 6LoWPAN! We shall port this Legacy to

en.wikipedia.org/wiki/IEEE_802

1
Lup Yuen Lee 李立源

The Medium Access Control Layer (right) of our Driver implements the LoRaWAN Protocol: Encryption, Receive Window, Duty Cycle, ... It exposes the MCPS Messaging Interface (IEEE 802.15.4) to the Node Layer (centre) via an Event Queue

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

The Protocol is explained in this thread: Encryption, Receive Window, Duty Cycle, ...

qoto.org/@lupyuen/105874847933

1
Lup Yuen Lee 李立源

How shall we implement the Event Queue for the Medium Access Control Layer? With the NimBLE Porting Layer of course!

lupyuen.github.io/articles/lor

1
Lup Yuen Lee 李立源

Curiously, our Driver includes a Command-Line Interface (bottom) that Transmits and Receives LoRa Packets ... Directly calling the SX1276 Driver 🤔

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

Uh-oh our Driver (from Mynewt) passes LoRaWAN Packets in Mbuf Format ... Let's find something equivalent on BL602 🤔

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

What's an Mbuf? Why is it used by our Driver? Mbufs are Chains of Fixed-Size Blocks ... Works great with little RAM (no fragmentation) ... Created for BSD Unix in 1983!

mynewt.apache.org/latest/os/co

1
Lup Yuen Lee 李立源

IoT SDK has a "pbuf" in the lwIP Lightweight TCP/IP Stack ... Maybe our BL602 Driver can use this instead of Mbuf? 🤔

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

Here's a friendly doc by STMicro that explains MCPS Messaging in our Driver

st.com/content/ccc/resource/te

1
Lup Yuen Lee 李立源

...Which explains why so many folks at STMicro are now reading this Thread

😉

1
Lup Yuen Lee 李立源

Yep "pbuf" from the Lightweight IP Stack can be used instead of Mbuf ... We just need to shift the Header / Payload Pointer to work on Packets

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

We verify that "pbuf" Packet Buffers can handle a full Packet ... Header: 20 bytes, Max Payload: 255 bytes

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

Why "pbuf" is OK for handling Packets

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

Our Driver uses Mbuf Queues (from Mynewt OS) ... We shall convert them to pbuf Event Queues ... From the NimBLE Porting Library

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

Porting pbuf Packet Buffer Queue from Mynewt OS to ... Makes me hungry for Peanut Butter Jelly Sandwich 🤤

github.com/lupyuen/bl_iot_sdk/

1+
Lup Yuen Lee 李立源

Using this simpler Windows CMD script to build the Driver ... Quicker for fixing build errors

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源
Follow

Add the "c_cpp_properties.json" file to ... So that our Build Errors are highlighted

github.com/lupyuen/bl_iot_sdk/

· · Tusky · 1 · 0 · 0
Lup Yuen Lee 李立源

Reference Implementation of Semtech Stack is here ... Includes drivers for SX1262 and SX1276

github.com/Lora-net/LoRaMac-no

1
Lup Yuen Lee 李立源

Bought the RAKwireless Gateway: Developer D4H ... Will benchmark this with LoRa Gateway (Also based on RAKwireless RAK2287)

docs.rakwireless.com/Product-C

1
Lup Yuen Lee 李立源

ChirpStack (open source server) is preinstalled on @RAKwireless ... We shall test this with and

docs.rakwireless.com/Product-C

1
Lup Yuen Lee 李立源

on RAKwireless can generate random Application Keys for Over-The-Air Activation (OTAA) ... We shall use keys to activate our and devices wirelessly

thethingsindustries.com/docs/d

1
Lup Yuen Lee 李立源

Our RAKwireless Gateway has received over 800 Packets in a day ... And I haven't powered on my BL602 and WisBlock gadgets yet! 🤔

docs.rakwireless.com/Product-C

1
Lup Yuen Lee 李立源

Something (or Someone) is transmitting Packets every minute ... Signal Strength (RSSI) shows that they're a few hundred metres away

gist.github.com/lupyuen/8dacf0

1+
Lup Yuen Lee 李立源

Based on earlier Coverage Testing (with and ) ... High chance that our Mystery Transmitter is at the nearby Subway Station 🤔

lupyuen.github.io/articles/wis

1+
Lup Yuen Lee 李立源

Someday I might walk around with RAKwireless to find the Mystery Transmitter ... But for now let's test WisGate with WisBlock and BL602!

docs.rakwireless.com/Product-C

1
Lup Yuen Lee 李立源

Still fixing Driver for ... So let's test WisGate with WisBlock first

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

Driver for ... One last build error

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

Driver for ... Builds and links OK yay! 🎉 Heading out for second dose of Moderna ... And some downtime

github.com/lupyuen/bl_iot_sdk/

1
Lup Yuen Lee 李立源

Let's test RAKwireless with ... With this program ... Once I get home from vaccination

github.com/RAKWireless/WisBloc

1
Lup Yuen Lee 李立源

sample fails to compile ... Let's find out why 🤔 (Hope it's not because of the vaccination)

github.com/lupyuen/wisblock-lo

1
Lup Yuen Lee 李立源

sample now builds OK ... After upgrading SX126x Arduino Library to Version 2 ... Released 2 weeks ago!

github.com/lupyuen/wisblock-lo

1
Lup Yuen Lee 李立源

We copy the Device EUI and Application Key from to the client ... For Over-The-Air Activation (OTAA)

github.com/lupyuen/wisblock-lo

1
Lup Yuen Lee 李立源

joins the Network ... And gets accepted!

github.com/lupyuen/wisblock-lo

1
Lup Yuen Lee 李立源

After joining 's Network wirelessly ... can now transmit LoRaWAN Packets to the LoRaWAN App

github.com/lupyuen/wisblock-lo

1
Lup Yuen Lee 李立源

What's inside the Packet received by ? Check the Device Data ... "Hello!"

github.com/lupyuen/wisblock-lo

1
Lup Yuen Lee 李立源

Inside the Join Network Request (Over-The-Air Activation) ... Received by from

github.com/lupyuen/wisblock-lo

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░▒▓█►─═ 𐌔Ꝋ𐌂𐌊𐌔 𐌐𐌓Ꝋ𐋄𐌙 𓂀 ═─◄█▓▒░

@lupyuen
You need to think of secu now. Who is and who isnt allowed on the net. Either no entrance from blacklist or whitelist guests only allowed.

0
░▒▓█►─═ 𐌔Ꝋ𐌂𐌊𐌔 𐌐𐌓Ꝋ𐋄𐌙 𓂀 ═─◄█▓▒░

@lupyuen
One more hint. Try to measure signal strength and drive around with detector and record gps plus power detected.
That should help to narrow it down.
Good luck.

0
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